./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:37:39,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:37:39,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:37:39,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:37:39,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:37:39,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:37:39,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:37:39,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:37:39,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:37:39,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:37:39,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:37:39,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:37:39,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:37:39,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:37:39,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:37:39,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:37:39,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:37:39,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:37:39,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:37:39,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:37:39,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:37:39,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:37:39,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:37:39,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:37:39,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:37:39,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:37:39,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:37:39,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:37:39,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:37:39,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:37:39,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:37:39,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:37:39,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:37:39,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:37:39,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:37:39,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:37:39,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:37:39,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:37:39,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:37:39,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:37:39,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:37:39,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 11:37:39,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:37:39,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:37:39,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:37:39,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:37:39,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:37:39,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:37:39,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:37:39,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:37:39,724 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:37:39,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:37:39,726 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:37:39,726 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:37:39,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:37:39,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:37:39,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:37:39,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:37:39,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:37:39,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:37:39,728 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 11:37:39,728 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:37:39,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:37:39,729 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:37:39,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:37:39,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:37:39,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:37:39,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:37:39,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:37:39,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:37:39,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:37:39,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:37:39,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:37:39,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:37:39,732 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:37:39,732 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:37:39,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:37:39,733 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_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-20 11:37:40,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:37:40,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:37:40,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:37:40,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:37:40,129 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:37:40,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-20 11:37:43,428 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:37:43,679 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:37:43,679 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-20 11:37:43,687 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/data/ca19ce0dc/d6496768a7b84525b94b6a549bc715ba/FLAGed0ad9178 [2022-11-20 11:37:43,705 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/data/ca19ce0dc/d6496768a7b84525b94b6a549bc715ba [2022-11-20 11:37:43,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:37:43,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:37:43,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:37:43,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:37:43,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:37:43,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:43" (1/1) ... [2022-11-20 11:37:43,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6368842a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:43, skipping insertion in model container [2022-11-20 11:37:43,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:43" (1/1) ... [2022-11-20 11:37:43,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:37:43,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:37:44,056 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_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-20 11:37:44,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:37:44,073 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:37:44,109 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_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-20 11:37:44,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:37:44,135 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:37:44,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44 WrapperNode [2022-11-20 11:37:44,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:37:44,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:37:44,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:37:44,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:37:44,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,189 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 132 [2022-11-20 11:37:44,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:37:44,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:37:44,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:37:44,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:37:44,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,224 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:37:44,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:37:44,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:37:44,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:37:44,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (1/1) ... [2022-11-20 11:37:44,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:37:44,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:44,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:37:44,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:37:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:37:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:37:44,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:37:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:37:44,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:37:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:37:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:37:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:37:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:37:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:37:44,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:37:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:37:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:37:44,332 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:37:44,455 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:37:44,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:37:45,072 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:37:45,086 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:37:45,086 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:37:45,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:45 BoogieIcfgContainer [2022-11-20 11:37:45,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:37:45,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:37:45,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:37:45,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:37:45,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:37:43" (1/3) ... [2022-11-20 11:37:45,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158155ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:45, skipping insertion in model container [2022-11-20 11:37:45,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:44" (2/3) ... [2022-11-20 11:37:45,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158155ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:45, skipping insertion in model container [2022-11-20 11:37:45,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:45" (3/3) ... [2022-11-20 11:37:45,100 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-20 11:37:45,112 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:37:45,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:37:45,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-20 11:37:45,127 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:37:45,269 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:37:45,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 249 transitions, 514 flow [2022-11-20 11:37:45,441 INFO L130 PetriNetUnfolder]: 21/247 cut-off events. [2022-11-20 11:37:45,441 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:37:45,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 247 events. 21/247 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 328 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 169. Up to 3 conditions per place. [2022-11-20 11:37:45,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 249 transitions, 514 flow [2022-11-20 11:37:45,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 212 transitions, 433 flow [2022-11-20 11:37:45,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:45,479 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;@7f0d3e6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:45,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-20 11:37:45,501 INFO L130 PetriNetUnfolder]: 3/71 cut-off events. [2022-11-20 11:37:45,502 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:45,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:45,503 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] [2022-11-20 11:37:45,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:37:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash -583793825, now seen corresponding path program 1 times [2022-11-20 11:37:45,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:45,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921730455] [2022-11-20 11:37:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:45,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:46,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:46,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921730455] [2022-11-20 11:37:46,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921730455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:46,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:46,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:46,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143592308] [2022-11-20 11:37:46,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:37:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:37:46,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:46,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-20 11:37:46,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 212 transitions, 433 flow. Second operand has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:46,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-20 11:37:46,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:46,501 INFO L130 PetriNetUnfolder]: 19/328 cut-off events. [2022-11-20 11:37:46,501 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 11:37:46,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 328 events. 19/328 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 911 event pairs, 0 based on Foata normal form. 12/296 useless extension candidates. Maximal degree in co-relation 287. Up to 29 conditions per place. [2022-11-20 11:37:46,507 INFO L137 encePairwiseOnDemand]: 228/249 looper letters, 38 selfloop transitions, 9 changer transitions 4/224 dead transitions. [2022-11-20 11:37:46,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 224 transitions, 560 flow [2022-11-20 11:37:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:37:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:37:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1108 transitions. [2022-11-20 11:37:46,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8899598393574297 [2022-11-20 11:37:46,541 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1108 transitions. [2022-11-20 11:37:46,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1108 transitions. [2022-11-20 11:37:46,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:46,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1108 transitions. [2022-11-20 11:37:46,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,576 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,578 INFO L175 Difference]: Start difference. First operand has 201 places, 212 transitions, 433 flow. Second operand 5 states and 1108 transitions. [2022-11-20 11:37:46,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 224 transitions, 560 flow [2022-11-20 11:37:46,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 224 transitions, 550 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 11:37:46,590 INFO L231 Difference]: Finished difference. Result has 205 places, 207 transitions, 471 flow [2022-11-20 11:37:46,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=471, PETRI_PLACES=205, PETRI_TRANSITIONS=207} [2022-11-20 11:37:46,598 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 4 predicate places. [2022-11-20 11:37:46,598 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 207 transitions, 471 flow [2022-11-20 11:37:46,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:46,600 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, 1, 1, 1, 1, 1] [2022-11-20 11:37:46,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:37:46,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:37:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:46,602 INFO L85 PathProgramCache]: Analyzing trace with hash 621522115, now seen corresponding path program 1 times [2022-11-20 11:37:46,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:46,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928114272] [2022-11-20 11:37:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:46,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:46,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:46,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928114272] [2022-11-20 11:37:46,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928114272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475540943] [2022-11-20 11:37:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:46,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:46,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:46,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:37:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:37:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:47,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:47,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475540943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:47,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:47,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 11:37:47,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642276899] [2022-11-20 11:37:47,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:47,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:37:47,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:47,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:37:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:37:47,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-20 11:37:47,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 207 transitions, 471 flow. Second operand has 12 states, 12 states have (on average 211.66666666666666) internal successors, (2540), 12 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:47,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:47,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-20 11:37:47,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:47,918 INFO L130 PetriNetUnfolder]: 46/700 cut-off events. [2022-11-20 11:37:47,918 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-20 11:37:47,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 700 events. 46/700 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3057 event pairs, 0 based on Foata normal form. 6/616 useless extension candidates. Maximal degree in co-relation 500. Up to 22 conditions per place. [2022-11-20 11:37:47,932 INFO L137 encePairwiseOnDemand]: 234/249 looper letters, 71 selfloop transitions, 40 changer transitions 0/284 dead transitions. [2022-11-20 11:37:47,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 284 transitions, 913 flow [2022-11-20 11:37:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:37:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:37:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3879 transitions. [2022-11-20 11:37:47,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8654618473895582 [2022-11-20 11:37:47,942 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3879 transitions. [2022-11-20 11:37:47,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3879 transitions. [2022-11-20 11:37:47,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:47,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3879 transitions. [2022-11-20 11:37:47,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 215.5) internal successors, (3879), 18 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:47,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:47,974 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:47,974 INFO L175 Difference]: Start difference. First operand has 205 places, 207 transitions, 471 flow. Second operand 18 states and 3879 transitions. [2022-11-20 11:37:47,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 284 transitions, 913 flow [2022-11-20 11:37:47,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 284 transitions, 908 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:47,989 INFO L231 Difference]: Finished difference. Result has 221 places, 234 transitions, 704 flow [2022-11-20 11:37:47,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=704, PETRI_PLACES=221, PETRI_TRANSITIONS=234} [2022-11-20 11:37:47,991 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 20 predicate places. [2022-11-20 11:37:47,991 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 234 transitions, 704 flow [2022-11-20 11:37:47,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.66666666666666) internal successors, (2540), 12 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:47,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:47,995 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, 1, 1, 1, 1, 1] [2022-11-20 11:37:48,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:48,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:48,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:37:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:48,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2087316897, now seen corresponding path program 1 times [2022-11-20 11:37:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:48,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915706381] [2022-11-20 11:37:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:48,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:48,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915706381] [2022-11-20 11:37:48,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915706381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:48,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450687433] [2022-11-20 11:37:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:48,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:48,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:48,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:48,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:37:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:48,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:37:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:48,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:37:48,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450687433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:48,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:37:48,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:37:48,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952611582] [2022-11-20 11:37:48,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:48,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:37:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:48,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:37:48,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:37:48,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-20 11:37:48,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 234 transitions, 704 flow. Second operand has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:48,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:48,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-20 11:37:48,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:48,971 INFO L130 PetriNetUnfolder]: 46/692 cut-off events. [2022-11-20 11:37:48,971 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-20 11:37:48,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 692 events. 46/692 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2999 event pairs, 0 based on Foata normal form. 8/610 useless extension candidates. Maximal degree in co-relation 707. Up to 44 conditions per place. [2022-11-20 11:37:48,979 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 39 selfloop transitions, 27 changer transitions 0/239 dead transitions. [2022-11-20 11:37:48,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 239 transitions, 816 flow [2022-11-20 11:37:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:37:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:37:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1510 transitions. [2022-11-20 11:37:48,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8663224325874929 [2022-11-20 11:37:48,984 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1510 transitions. [2022-11-20 11:37:48,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1510 transitions. [2022-11-20 11:37:48,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:48,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1510 transitions. [2022-11-20 11:37:48,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 215.71428571428572) internal successors, (1510), 7 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:48,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:48,996 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:48,996 INFO L175 Difference]: Start difference. First operand has 221 places, 234 transitions, 704 flow. Second operand 7 states and 1510 transitions. [2022-11-20 11:37:48,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 239 transitions, 816 flow [2022-11-20 11:37:49,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 239 transitions, 742 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-20 11:37:49,006 INFO L231 Difference]: Finished difference. Result has 216 places, 226 transitions, 630 flow [2022-11-20 11:37:49,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=216, PETRI_TRANSITIONS=226} [2022-11-20 11:37:49,008 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 15 predicate places. [2022-11-20 11:37:49,008 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 226 transitions, 630 flow [2022-11-20 11:37:49,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:49,010 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, 1, 1, 1, 1, 1] [2022-11-20 11:37:49,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 11:37:49,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:49,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:37:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:49,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1309834145, now seen corresponding path program 2 times [2022-11-20 11:37:49,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:49,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875892162] [2022-11-20 11:37:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:49,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:49,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:49,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875892162] [2022-11-20 11:37:49,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875892162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509670873] [2022-11-20 11:37:49,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:37:49,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:49,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:49,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:49,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:37:49,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:37:49,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:37:49,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:37:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:37:50,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 11:37:50,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509670873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:50,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:50,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 11:37:50,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977610838] [2022-11-20 11:37:50,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:50,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 249 [2022-11-20 11:37:50,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 226 transitions, 630 flow. Second operand has 18 states, 18 states have (on average 183.61111111111111) internal successors, (3305), 18 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:50,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:50,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 249 [2022-11-20 11:37:50,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:52,503 INFO L130 PetriNetUnfolder]: 722/3123 cut-off events. [2022-11-20 11:37:52,503 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2022-11-20 11:37:52,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4622 conditions, 3123 events. 722/3123 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 24291 event pairs, 371 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 3660. Up to 182 conditions per place. [2022-11-20 11:37:52,533 INFO L137 encePairwiseOnDemand]: 229/249 looper letters, 191 selfloop transitions, 65 changer transitions 0/400 dead transitions. [2022-11-20 11:37:52,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 400 transitions, 1573 flow [2022-11-20 11:37:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 11:37:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 11:37:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 9080 transitions. [2022-11-20 11:37:52,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7442012949758217 [2022-11-20 11:37:52,558 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 9080 transitions. [2022-11-20 11:37:52,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 9080 transitions. [2022-11-20 11:37:52,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:52,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 9080 transitions. [2022-11-20 11:37:52,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 185.30612244897958) internal successors, (9080), 49 states have internal predecessors, (9080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:52,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 249.0) internal successors, (12450), 50 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:52,617 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 249.0) internal successors, (12450), 50 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:52,617 INFO L175 Difference]: Start difference. First operand has 216 places, 226 transitions, 630 flow. Second operand 49 states and 9080 transitions. [2022-11-20 11:37:52,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 400 transitions, 1573 flow [2022-11-20 11:37:52,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 400 transitions, 1530 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:37:52,627 INFO L231 Difference]: Finished difference. Result has 262 places, 251 transitions, 845 flow [2022-11-20 11:37:52,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=845, PETRI_PLACES=262, PETRI_TRANSITIONS=251} [2022-11-20 11:37:52,628 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 61 predicate places. [2022-11-20 11:37:52,629 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 251 transitions, 845 flow [2022-11-20 11:37:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.61111111111111) internal successors, (3305), 18 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:52,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:52,631 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:52,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:52,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-20 11:37:52,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:37:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:52,839 INFO L85 PathProgramCache]: Analyzing trace with hash 167424311, now seen corresponding path program 1 times [2022-11-20 11:37:52,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:52,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386917952] [2022-11-20 11:37:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:53,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:53,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386917952] [2022-11-20 11:37:53,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386917952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:53,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:53,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:37:53,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856724871] [2022-11-20 11:37:53,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:53,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:37:53,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:37:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:37:53,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 249 [2022-11-20 11:37:53,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 251 transitions, 845 flow. Second operand has 11 states, 11 states have (on average 163.1818181818182) internal successors, (1795), 11 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:53,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:53,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 249 [2022-11-20 11:37:53,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:55,107 INFO L130 PetriNetUnfolder]: 1289/5611 cut-off events. [2022-11-20 11:37:55,107 INFO L131 PetriNetUnfolder]: For 615/615 co-relation queries the response was YES. [2022-11-20 11:37:55,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8251 conditions, 5611 events. 1289/5611 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 51138 event pairs, 546 based on Foata normal form. 0/4393 useless extension candidates. Maximal degree in co-relation 7076. Up to 951 conditions per place. [2022-11-20 11:37:55,163 INFO L137 encePairwiseOnDemand]: 231/249 looper letters, 136 selfloop transitions, 28 changer transitions 0/317 dead transitions. [2022-11-20 11:37:55,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 317 transitions, 1408 flow [2022-11-20 11:37:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:37:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 11:37:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2673 transitions. [2022-11-20 11:37:55,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.670933734939759 [2022-11-20 11:37:55,173 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2673 transitions. [2022-11-20 11:37:55,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2673 transitions. [2022-11-20 11:37:55,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:55,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2673 transitions. [2022-11-20 11:37:55,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.0625) internal successors, (2673), 16 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,196 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,196 INFO L175 Difference]: Start difference. First operand has 262 places, 251 transitions, 845 flow. Second operand 16 states and 2673 transitions. [2022-11-20 11:37:55,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 317 transitions, 1408 flow [2022-11-20 11:37:55,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 317 transitions, 1301 flow, removed 13 selfloop flow, removed 15 redundant places. [2022-11-20 11:37:55,216 INFO L231 Difference]: Finished difference. Result has 270 places, 258 transitions, 879 flow [2022-11-20 11:37:55,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=879, PETRI_PLACES=270, PETRI_TRANSITIONS=258} [2022-11-20 11:37:55,220 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 69 predicate places. [2022-11-20 11:37:55,220 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 258 transitions, 879 flow [2022-11-20 11:37:55,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 163.1818181818182) internal successors, (1795), 11 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:55,222 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:37:55,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:37:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash 895186976, now seen corresponding path program 1 times [2022-11-20 11:37:55,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909353935] [2022-11-20 11:37:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:55,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909353935] [2022-11-20 11:37:55,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909353935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:55,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:55,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:37:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914229858] [2022-11-20 11:37:55,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:55,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:37:55,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:55,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:37:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:37:55,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 249 [2022-11-20 11:37:55,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 258 transitions, 879 flow. Second operand has 8 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:55,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 249 [2022-11-20 11:37:55,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:57,046 INFO L130 PetriNetUnfolder]: 1312/5840 cut-off events. [2022-11-20 11:37:57,046 INFO L131 PetriNetUnfolder]: For 1200/1200 co-relation queries the response was YES. [2022-11-20 11:37:57,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9118 conditions, 5840 events. 1312/5840 cut-off events. For 1200/1200 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 54779 event pairs, 358 based on Foata normal form. 59/5038 useless extension candidates. Maximal degree in co-relation 7795. Up to 1158 conditions per place. [2022-11-20 11:37:57,107 INFO L137 encePairwiseOnDemand]: 235/249 looper letters, 105 selfloop transitions, 20 changer transitions 0/289 dead transitions. [2022-11-20 11:37:57,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 289 transitions, 1222 flow [2022-11-20 11:37:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:37:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 11:37:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2150 transitions. [2022-11-20 11:37:57,114 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7849580138736765 [2022-11-20 11:37:57,114 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2150 transitions. [2022-11-20 11:37:57,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2150 transitions. [2022-11-20 11:37:57,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:57,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2150 transitions. [2022-11-20 11:37:57,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.45454545454547) internal successors, (2150), 11 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:57,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:57,127 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:57,127 INFO L175 Difference]: Start difference. First operand has 270 places, 258 transitions, 879 flow. Second operand 11 states and 2150 transitions. [2022-11-20 11:37:57,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 289 transitions, 1222 flow [2022-11-20 11:37:57,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 289 transitions, 1204 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:37:57,138 INFO L231 Difference]: Finished difference. Result has 278 places, 261 transitions, 936 flow [2022-11-20 11:37:57,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=936, PETRI_PLACES=278, PETRI_TRANSITIONS=261} [2022-11-20 11:37:57,140 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 77 predicate places. [2022-11-20 11:37:57,140 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 261 transitions, 936 flow [2022-11-20 11:37:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:57,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:57,141 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:57,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:37:57,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:37:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2125735385, now seen corresponding path program 1 times [2022-11-20 11:37:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:57,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947268310] [2022-11-20 11:37:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:57,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:57,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:57,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947268310] [2022-11-20 11:37:57,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947268310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:57,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:57,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219660061] [2022-11-20 11:37:57,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:37:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:37:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:57,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-20 11:37:57,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 261 transitions, 936 flow. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:57,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:57,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-20 11:37:57,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:58,520 INFO L130 PetriNetUnfolder]: 588/4038 cut-off events. [2022-11-20 11:37:58,520 INFO L131 PetriNetUnfolder]: For 934/982 co-relation queries the response was YES. [2022-11-20 11:37:58,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 4038 events. 588/4038 cut-off events. For 934/982 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 38821 event pairs, 202 based on Foata normal form. 14/3672 useless extension candidates. Maximal degree in co-relation 6237. Up to 655 conditions per place. [2022-11-20 11:37:58,568 INFO L137 encePairwiseOnDemand]: 243/249 looper letters, 28 selfloop transitions, 4 changer transitions 0/276 dead transitions. [2022-11-20 11:37:58,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 276 transitions, 1037 flow [2022-11-20 11:37:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:37:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:37:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1129 transitions. [2022-11-20 11:37:58,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9068273092369478 [2022-11-20 11:37:58,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1129 transitions. [2022-11-20 11:37:58,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1129 transitions. [2022-11-20 11:37:58,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:58,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1129 transitions. [2022-11-20 11:37:58,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,579 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,580 INFO L175 Difference]: Start difference. First operand has 278 places, 261 transitions, 936 flow. Second operand 5 states and 1129 transitions. [2022-11-20 11:37:58,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 276 transitions, 1037 flow [2022-11-20 11:37:58,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 276 transitions, 1008 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-20 11:37:58,593 INFO L231 Difference]: Finished difference. Result has 278 places, 264 transitions, 937 flow [2022-11-20 11:37:58,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=937, PETRI_PLACES=278, PETRI_TRANSITIONS=264} [2022-11-20 11:37:58,595 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 77 predicate places. [2022-11-20 11:37:58,595 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 264 transitions, 937 flow [2022-11-20 11:37:58,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:58,596 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:58,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:37:58,596 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:37:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash -522835495, now seen corresponding path program 1 times [2022-11-20 11:37:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:58,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120217073] [2022-11-20 11:37:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:58,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:58,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120217073] [2022-11-20 11:37:58,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120217073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:58,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:58,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:37:58,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443815952] [2022-11-20 11:37:58,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:58,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:37:58,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:58,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:37:58,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:37:58,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 249 [2022-11-20 11:37:58,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 264 transitions, 937 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:58,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 249 [2022-11-20 11:37:58,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:01,872 INFO L130 PetriNetUnfolder]: 2007/9970 cut-off events. [2022-11-20 11:38:01,873 INFO L131 PetriNetUnfolder]: For 3494/3494 co-relation queries the response was YES. [2022-11-20 11:38:01,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17230 conditions, 9970 events. 2007/9970 cut-off events. For 3494/3494 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 109998 event pairs, 1158 based on Foata normal form. 36/8909 useless extension candidates. Maximal degree in co-relation 14663. Up to 2894 conditions per place. [2022-11-20 11:38:01,967 INFO L137 encePairwiseOnDemand]: 229/249 looper letters, 103 selfloop transitions, 36 changer transitions 0/295 dead transitions. [2022-11-20 11:38:01,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 295 transitions, 1312 flow [2022-11-20 11:38:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:38:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:38:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2973 transitions. [2022-11-20 11:38:01,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6633199464524766 [2022-11-20 11:38:01,974 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2973 transitions. [2022-11-20 11:38:01,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2973 transitions. [2022-11-20 11:38:01,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:01,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2973 transitions. [2022-11-20 11:38:01,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 165.16666666666666) internal successors, (2973), 18 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:01,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:01,990 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:01,990 INFO L175 Difference]: Start difference. First operand has 278 places, 264 transitions, 937 flow. Second operand 18 states and 2973 transitions. [2022-11-20 11:38:01,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 295 transitions, 1312 flow [2022-11-20 11:38:02,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 295 transitions, 1310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:02,019 INFO L231 Difference]: Finished difference. Result has 297 places, 266 transitions, 1042 flow [2022-11-20 11:38:02,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1042, PETRI_PLACES=297, PETRI_TRANSITIONS=266} [2022-11-20 11:38:02,020 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 96 predicate places. [2022-11-20 11:38:02,020 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 266 transitions, 1042 flow [2022-11-20 11:38:02,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:02,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:02,021 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:02,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:38:02,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash 976082515, now seen corresponding path program 1 times [2022-11-20 11:38:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:02,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642829649] [2022-11-20 11:38:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:02,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642829649] [2022-11-20 11:38:02,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642829649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583381430] [2022-11-20 11:38:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:02,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:02,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:02,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:02,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:38:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:02,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:38:02,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:38:02,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:38:02,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583381430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:02,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:38:02,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2022-11-20 11:38:02,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495837469] [2022-11-20 11:38:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:02,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:38:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:38:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:38:02,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 249 [2022-11-20 11:38:02,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 266 transitions, 1042 flow. Second operand has 9 states, 9 states have (on average 169.11111111111111) internal successors, (1522), 9 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:02,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:02,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 249 [2022-11-20 11:38:02,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:05,530 INFO L130 PetriNetUnfolder]: 1818/9546 cut-off events. [2022-11-20 11:38:05,531 INFO L131 PetriNetUnfolder]: For 5603/5603 co-relation queries the response was YES. [2022-11-20 11:38:05,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15985 conditions, 9546 events. 1818/9546 cut-off events. For 5603/5603 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 105158 event pairs, 1182 based on Foata normal form. 175/8655 useless extension candidates. Maximal degree in co-relation 14744. Up to 3174 conditions per place. [2022-11-20 11:38:05,628 INFO L137 encePairwiseOnDemand]: 235/249 looper letters, 56 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2022-11-20 11:38:05,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 261 transitions, 1144 flow [2022-11-20 11:38:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:38:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 11:38:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1867 transitions. [2022-11-20 11:38:05,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6816356334428624 [2022-11-20 11:38:05,633 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1867 transitions. [2022-11-20 11:38:05,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1867 transitions. [2022-11-20 11:38:05,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:05,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1867 transitions. [2022-11-20 11:38:05,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,648 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,648 INFO L175 Difference]: Start difference. First operand has 297 places, 266 transitions, 1042 flow. Second operand 11 states and 1867 transitions. [2022-11-20 11:38:05,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 261 transitions, 1144 flow [2022-11-20 11:38:05,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 261 transitions, 1070 flow, removed 1 selfloop flow, removed 19 redundant places. [2022-11-20 11:38:05,668 INFO L231 Difference]: Finished difference. Result has 285 places, 261 transitions, 958 flow [2022-11-20 11:38:05,668 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=958, PETRI_PLACES=285, PETRI_TRANSITIONS=261} [2022-11-20 11:38:05,669 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 84 predicate places. [2022-11-20 11:38:05,669 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 261 transitions, 958 flow [2022-11-20 11:38:05,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.11111111111111) internal successors, (1522), 9 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:05,670 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:05,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:05,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:05,876 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:05,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2146650667, now seen corresponding path program 1 times [2022-11-20 11:38:05,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:05,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748843223] [2022-11-20 11:38:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:05,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:06,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748843223] [2022-11-20 11:38:06,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748843223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530979075] [2022-11-20 11:38:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:06,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:06,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:06,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:38:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:38:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:38:07,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:38:07,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530979075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:07,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:38:07,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 20 [2022-11-20 11:38:07,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159401430] [2022-11-20 11:38:07,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:07,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:38:07,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:38:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:38:07,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 249 [2022-11-20 11:38:07,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 261 transitions, 958 flow. Second operand has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:07,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:07,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 249 [2022-11-20 11:38:07,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:09,123 INFO L130 PetriNetUnfolder]: 1506/8154 cut-off events. [2022-11-20 11:38:09,123 INFO L131 PetriNetUnfolder]: For 2179/2179 co-relation queries the response was YES. [2022-11-20 11:38:09,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12669 conditions, 8154 events. 1506/8154 cut-off events. For 2179/2179 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 86561 event pairs, 930 based on Foata normal form. 276/7460 useless extension candidates. Maximal degree in co-relation 11110. Up to 2539 conditions per place. [2022-11-20 11:38:09,179 INFO L137 encePairwiseOnDemand]: 231/249 looper letters, 45 selfloop transitions, 29 changer transitions 0/257 dead transitions. [2022-11-20 11:38:09,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 257 transitions, 1076 flow [2022-11-20 11:38:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:38:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 11:38:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2195 transitions. [2022-11-20 11:38:09,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6780970033982082 [2022-11-20 11:38:09,184 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2195 transitions. [2022-11-20 11:38:09,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2195 transitions. [2022-11-20 11:38:09,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:09,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2195 transitions. [2022-11-20 11:38:09,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.84615384615384) internal successors, (2195), 13 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:09,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:09,197 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:09,198 INFO L175 Difference]: Start difference. First operand has 285 places, 261 transitions, 958 flow. Second operand 13 states and 2195 transitions. [2022-11-20 11:38:09,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 257 transitions, 1076 flow [2022-11-20 11:38:09,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 257 transitions, 1010 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-11-20 11:38:09,214 INFO L231 Difference]: Finished difference. Result has 279 places, 257 transitions, 920 flow [2022-11-20 11:38:09,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=920, PETRI_PLACES=279, PETRI_TRANSITIONS=257} [2022-11-20 11:38:09,215 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 78 predicate places. [2022-11-20 11:38:09,216 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 257 transitions, 920 flow [2022-11-20 11:38:09,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:09,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:09,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:09,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:09,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:38:09,423 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1753887381, now seen corresponding path program 1 times [2022-11-20 11:38:09,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:09,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478476928] [2022-11-20 11:38:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:09,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:09,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:09,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478476928] [2022-11-20 11:38:09,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478476928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:09,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:09,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:38:09,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203458361] [2022-11-20 11:38:09,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:09,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:38:09,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:38:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:38:09,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-20 11:38:09,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 257 transitions, 920 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:09,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:09,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-20 11:38:09,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:10,905 INFO L130 PetriNetUnfolder]: 1746/7178 cut-off events. [2022-11-20 11:38:10,905 INFO L131 PetriNetUnfolder]: For 1583/1607 co-relation queries the response was YES. [2022-11-20 11:38:10,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11071 conditions, 7178 events. 1746/7178 cut-off events. For 1583/1607 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 82831 event pairs, 684 based on Foata normal form. 0/5626 useless extension candidates. Maximal degree in co-relation 9404. Up to 1709 conditions per place. [2022-11-20 11:38:10,951 INFO L137 encePairwiseOnDemand]: 243/249 looper letters, 27 selfloop transitions, 4 changer transitions 0/271 dead transitions. [2022-11-20 11:38:10,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 271 transitions, 1013 flow [2022-11-20 11:38:10,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:38:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:38:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2022-11-20 11:38:10,954 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9060240963855422 [2022-11-20 11:38:10,954 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2022-11-20 11:38:10,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2022-11-20 11:38:10,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:10,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2022-11-20 11:38:10,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:10,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:10,960 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:10,960 INFO L175 Difference]: Start difference. First operand has 279 places, 257 transitions, 920 flow. Second operand 5 states and 1128 transitions. [2022-11-20 11:38:10,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 271 transitions, 1013 flow [2022-11-20 11:38:10,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 271 transitions, 955 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-20 11:38:10,968 INFO L231 Difference]: Finished difference. Result has 274 places, 260 transitions, 892 flow [2022-11-20 11:38:10,969 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=892, PETRI_PLACES=274, PETRI_TRANSITIONS=260} [2022-11-20 11:38:10,970 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 73 predicate places. [2022-11-20 11:38:10,970 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 260 transitions, 892 flow [2022-11-20 11:38:10,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:10,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:10,971 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:10,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:38:10,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash -970522674, now seen corresponding path program 1 times [2022-11-20 11:38:10,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:10,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664386270] [2022-11-20 11:38:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:10,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:38:11,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:11,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664386270] [2022-11-20 11:38:11,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664386270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:11,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:11,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:38:11,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600308099] [2022-11-20 11:38:11,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:11,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:38:11,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:11,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:38:11,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:38:11,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-20 11:38:11,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 260 transitions, 892 flow. Second operand has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:11,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-20 11:38:11,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:13,575 INFO L130 PetriNetUnfolder]: 2969/11438 cut-off events. [2022-11-20 11:38:13,575 INFO L131 PetriNetUnfolder]: For 2263/2305 co-relation queries the response was YES. [2022-11-20 11:38:13,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20197 conditions, 11438 events. 2969/11438 cut-off events. For 2263/2305 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 125595 event pairs, 1941 based on Foata normal form. 7/9947 useless extension candidates. Maximal degree in co-relation 17265. Up to 4348 conditions per place. [2022-11-20 11:38:13,652 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 118 selfloop transitions, 22 changer transitions 5/311 dead transitions. [2022-11-20 11:38:13,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 311 transitions, 1385 flow [2022-11-20 11:38:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:38:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:38:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1944 transitions. [2022-11-20 11:38:13,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7807228915662651 [2022-11-20 11:38:13,657 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1944 transitions. [2022-11-20 11:38:13,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1944 transitions. [2022-11-20 11:38:13,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:13,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1944 transitions. [2022-11-20 11:38:13,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.4) internal successors, (1944), 10 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:13,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:13,668 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:13,668 INFO L175 Difference]: Start difference. First operand has 274 places, 260 transitions, 892 flow. Second operand 10 states and 1944 transitions. [2022-11-20 11:38:13,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 311 transitions, 1385 flow [2022-11-20 11:38:13,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 311 transitions, 1383 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:13,685 INFO L231 Difference]: Finished difference. Result has 284 places, 261 transitions, 947 flow [2022-11-20 11:38:13,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=947, PETRI_PLACES=284, PETRI_TRANSITIONS=261} [2022-11-20 11:38:13,686 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 83 predicate places. [2022-11-20 11:38:13,686 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 261 transitions, 947 flow [2022-11-20 11:38:13,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:13,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:13,688 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:13,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:38:13,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:13,689 INFO L85 PathProgramCache]: Analyzing trace with hash -14427536, now seen corresponding path program 1 times [2022-11-20 11:38:13,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:13,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141380186] [2022-11-20 11:38:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:13,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:38:13,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:13,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141380186] [2022-11-20 11:38:13,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141380186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:13,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:13,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:38:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902174412] [2022-11-20 11:38:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:13,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:38:13,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:38:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:38:13,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-20 11:38:13,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 261 transitions, 947 flow. Second operand has 7 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:13,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:13,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-20 11:38:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:16,416 INFO L130 PetriNetUnfolder]: 3151/11597 cut-off events. [2022-11-20 11:38:16,417 INFO L131 PetriNetUnfolder]: For 3261/3326 co-relation queries the response was YES. [2022-11-20 11:38:16,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20494 conditions, 11597 events. 3151/11597 cut-off events. For 3261/3326 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 124303 event pairs, 2156 based on Foata normal form. 41/10578 useless extension candidates. Maximal degree in co-relation 17838. Up to 5003 conditions per place. [2022-11-20 11:38:16,515 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 94 selfloop transitions, 21 changer transitions 28/309 dead transitions. [2022-11-20 11:38:16,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 309 transitions, 1426 flow [2022-11-20 11:38:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:38:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:38:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1941 transitions. [2022-11-20 11:38:16,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7795180722891566 [2022-11-20 11:38:16,519 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1941 transitions. [2022-11-20 11:38:16,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1941 transitions. [2022-11-20 11:38:16,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:16,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1941 transitions. [2022-11-20 11:38:16,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.1) internal successors, (1941), 10 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,528 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,528 INFO L175 Difference]: Start difference. First operand has 284 places, 261 transitions, 947 flow. Second operand 10 states and 1941 transitions. [2022-11-20 11:38:16,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 309 transitions, 1426 flow [2022-11-20 11:38:16,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 309 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-20 11:38:16,543 INFO L231 Difference]: Finished difference. Result has 288 places, 260 transitions, 949 flow [2022-11-20 11:38:16,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=949, PETRI_PLACES=288, PETRI_TRANSITIONS=260} [2022-11-20 11:38:16,544 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 87 predicate places. [2022-11-20 11:38:16,545 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 260 transitions, 949 flow [2022-11-20 11:38:16,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:16,546 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:16,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:38:16,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1878758166, now seen corresponding path program 1 times [2022-11-20 11:38:16,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:16,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005556764] [2022-11-20 11:38:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:16,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:38:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:16,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005556764] [2022-11-20 11:38:16,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005556764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:16,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:16,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:38:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808865919] [2022-11-20 11:38:16,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:16,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:38:16,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:38:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:38:16,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-20 11:38:16,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 260 transitions, 949 flow. Second operand has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:16,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-20 11:38:16,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:18,358 INFO L130 PetriNetUnfolder]: 2112/8192 cut-off events. [2022-11-20 11:38:18,358 INFO L131 PetriNetUnfolder]: For 2414/2445 co-relation queries the response was YES. [2022-11-20 11:38:18,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15137 conditions, 8192 events. 2112/8192 cut-off events. For 2414/2445 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 84070 event pairs, 1614 based on Foata normal form. 11/7526 useless extension candidates. Maximal degree in co-relation 14319. Up to 3808 conditions per place. [2022-11-20 11:38:18,407 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 95 selfloop transitions, 15 changer transitions 6/282 dead transitions. [2022-11-20 11:38:18,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 282 transitions, 1246 flow [2022-11-20 11:38:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:38:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:38:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1560 transitions. [2022-11-20 11:38:18,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7831325301204819 [2022-11-20 11:38:18,411 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1560 transitions. [2022-11-20 11:38:18,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1560 transitions. [2022-11-20 11:38:18,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:18,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1560 transitions. [2022-11-20 11:38:18,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,420 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,420 INFO L175 Difference]: Start difference. First operand has 288 places, 260 transitions, 949 flow. Second operand 8 states and 1560 transitions. [2022-11-20 11:38:18,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 282 transitions, 1246 flow [2022-11-20 11:38:18,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 282 transitions, 1193 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-11-20 11:38:18,436 INFO L231 Difference]: Finished difference. Result has 284 places, 261 transitions, 943 flow [2022-11-20 11:38:18,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=284, PETRI_TRANSITIONS=261} [2022-11-20 11:38:18,438 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 83 predicate places. [2022-11-20 11:38:18,438 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 261 transitions, 943 flow [2022-11-20 11:38:18,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:18,439 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:18,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:38:18,440 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash -5635444, now seen corresponding path program 1 times [2022-11-20 11:38:18,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:18,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589864361] [2022-11-20 11:38:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:18,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:38:18,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:18,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589864361] [2022-11-20 11:38:18,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589864361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:18,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:18,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:38:18,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35966202] [2022-11-20 11:38:18,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:18,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:38:18,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:18,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:38:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:38:18,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-20 11:38:18,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 261 transitions, 943 flow. Second operand has 7 states, 7 states have (on average 190.42857142857142) internal successors, (1333), 7 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:18,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-20 11:38:18,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:20,604 INFO L130 PetriNetUnfolder]: 2567/9582 cut-off events. [2022-11-20 11:38:20,604 INFO L131 PetriNetUnfolder]: For 2870/2875 co-relation queries the response was YES. [2022-11-20 11:38:20,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16964 conditions, 9582 events. 2567/9582 cut-off events. For 2870/2875 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 99229 event pairs, 1830 based on Foata normal form. 5/8745 useless extension candidates. Maximal degree in co-relation 16154. Up to 4354 conditions per place. [2022-11-20 11:38:20,674 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 80 selfloop transitions, 13 changer transitions 21/280 dead transitions. [2022-11-20 11:38:20,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 280 transitions, 1222 flow [2022-11-20 11:38:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:38:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:38:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1557 transitions. [2022-11-20 11:38:20,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7816265060240963 [2022-11-20 11:38:20,679 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1557 transitions. [2022-11-20 11:38:20,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1557 transitions. [2022-11-20 11:38:20,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:20,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1557 transitions. [2022-11-20 11:38:20,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:20,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:20,690 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:20,690 INFO L175 Difference]: Start difference. First operand has 284 places, 261 transitions, 943 flow. Second operand 8 states and 1557 transitions. [2022-11-20 11:38:20,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 280 transitions, 1222 flow [2022-11-20 11:38:20,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 280 transitions, 1195 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 11:38:20,711 INFO L231 Difference]: Finished difference. Result has 288 places, 257 transitions, 921 flow [2022-11-20 11:38:20,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=921, PETRI_PLACES=288, PETRI_TRANSITIONS=257} [2022-11-20 11:38:20,713 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 87 predicate places. [2022-11-20 11:38:20,713 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 257 transitions, 921 flow [2022-11-20 11:38:20,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.42857142857142) internal successors, (1333), 7 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:20,714 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:20,714 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:20,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:38:20,715 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash -582249507, now seen corresponding path program 1 times [2022-11-20 11:38:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:20,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392588756] [2022-11-20 11:38:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:20,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:38:21,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:21,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392588756] [2022-11-20 11:38:21,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392588756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755979595] [2022-11-20 11:38:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:21,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:21,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:21,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:38:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:21,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:38:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:38:21,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:38:21,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755979595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:21,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:21,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-20 11:38:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108611731] [2022-11-20 11:38:21,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:21,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:38:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:21,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:38:21,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:38:21,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 249 [2022-11-20 11:38:21,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 257 transitions, 921 flow. Second operand has 28 states, 28 states have (on average 173.10714285714286) internal successors, (4847), 28 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:21,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:21,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 249 [2022-11-20 11:38:21,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:26,851 INFO L130 PetriNetUnfolder]: 3773/14709 cut-off events. [2022-11-20 11:38:26,852 INFO L131 PetriNetUnfolder]: For 4137/4148 co-relation queries the response was YES. [2022-11-20 11:38:26,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27796 conditions, 14709 events. 3773/14709 cut-off events. For 4137/4148 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 175129 event pairs, 2093 based on Foata normal form. 90/13731 useless extension candidates. Maximal degree in co-relation 23036. Up to 3705 conditions per place. [2022-11-20 11:38:26,948 INFO L137 encePairwiseOnDemand]: 223/249 looper letters, 221 selfloop transitions, 78 changer transitions 62/499 dead transitions. [2022-11-20 11:38:26,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 499 transitions, 2493 flow [2022-11-20 11:38:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 11:38:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-20 11:38:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 8922 transitions. [2022-11-20 11:38:26,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7025750059059769 [2022-11-20 11:38:26,962 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 8922 transitions. [2022-11-20 11:38:26,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 8922 transitions. [2022-11-20 11:38:26,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:26,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 8922 transitions. [2022-11-20 11:38:26,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 174.94117647058823) internal successors, (8922), 51 states have internal predecessors, (8922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:27,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 249.0) internal successors, (12948), 52 states have internal predecessors, (12948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:27,007 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 249.0) internal successors, (12948), 52 states have internal predecessors, (12948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:27,008 INFO L175 Difference]: Start difference. First operand has 288 places, 257 transitions, 921 flow. Second operand 51 states and 8922 transitions. [2022-11-20 11:38:27,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 499 transitions, 2493 flow [2022-11-20 11:38:27,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 499 transitions, 2373 flow, removed 27 selfloop flow, removed 10 redundant places. [2022-11-20 11:38:27,040 INFO L231 Difference]: Finished difference. Result has 328 places, 291 transitions, 1230 flow [2022-11-20 11:38:27,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1230, PETRI_PLACES=328, PETRI_TRANSITIONS=291} [2022-11-20 11:38:27,041 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 127 predicate places. [2022-11-20 11:38:27,042 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 291 transitions, 1230 flow [2022-11-20 11:38:27,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.10714285714286) internal successors, (4847), 28 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:27,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:27,044 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:27,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:27,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:38:27,249 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1594287935, now seen corresponding path program 1 times [2022-11-20 11:38:27,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:27,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641231282] [2022-11-20 11:38:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:27,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:38:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:27,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641231282] [2022-11-20 11:38:27,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641231282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:27,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279591486] [2022-11-20 11:38:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:27,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:27,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:27,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:27,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:38:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:27,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:38:27,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:38:28,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:38:28,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279591486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:28,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:28,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-20 11:38:28,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193188119] [2022-11-20 11:38:28,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:28,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:38:28,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:38:28,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:38:28,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 249 [2022-11-20 11:38:28,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 291 transitions, 1230 flow. Second operand has 28 states, 28 states have (on average 173.17857142857142) internal successors, (4849), 28 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:28,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 249 [2022-11-20 11:38:28,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:34,259 INFO L130 PetriNetUnfolder]: 4841/17239 cut-off events. [2022-11-20 11:38:34,259 INFO L131 PetriNetUnfolder]: For 10722/10941 co-relation queries the response was YES. [2022-11-20 11:38:34,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32680 conditions, 17239 events. 4841/17239 cut-off events. For 10722/10941 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 209618 event pairs, 2051 based on Foata normal form. 219/15834 useless extension candidates. Maximal degree in co-relation 27011. Up to 4420 conditions per place. [2022-11-20 11:38:34,379 INFO L137 encePairwiseOnDemand]: 223/249 looper letters, 120 selfloop transitions, 55 changer transitions 190/503 dead transitions. [2022-11-20 11:38:34,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 503 transitions, 2655 flow [2022-11-20 11:38:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 11:38:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-20 11:38:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 8745 transitions. [2022-11-20 11:38:34,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7024096385542169 [2022-11-20 11:38:34,393 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 8745 transitions. [2022-11-20 11:38:34,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 8745 transitions. [2022-11-20 11:38:34,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:34,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 8745 transitions. [2022-11-20 11:38:34,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 174.9) internal successors, (8745), 50 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:34,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:34,434 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:34,434 INFO L175 Difference]: Start difference. First operand has 328 places, 291 transitions, 1230 flow. Second operand 50 states and 8745 transitions. [2022-11-20 11:38:34,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 503 transitions, 2655 flow [2022-11-20 11:38:34,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 503 transitions, 2572 flow, removed 6 selfloop flow, removed 19 redundant places. [2022-11-20 11:38:34,482 INFO L231 Difference]: Finished difference. Result has 375 places, 275 transitions, 1179 flow [2022-11-20 11:38:34,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1179, PETRI_PLACES=375, PETRI_TRANSITIONS=275} [2022-11-20 11:38:34,483 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 174 predicate places. [2022-11-20 11:38:34,483 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 275 transitions, 1179 flow [2022-11-20 11:38:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.17857142857142) internal successors, (4849), 28 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:34,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:34,485 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:34,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:34,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:38:34,695 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1493130083, now seen corresponding path program 1 times [2022-11-20 11:38:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:34,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257816302] [2022-11-20 11:38:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:34,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:35,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:35,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257816302] [2022-11-20 11:38:35,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257816302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:35,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738068327] [2022-11-20 11:38:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:35,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:35,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:35,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:35,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:38:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:35,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:38:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:35,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:35,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738068327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:35,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:35,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-20 11:38:35,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381355088] [2022-11-20 11:38:35,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:38:35,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:38:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:38:35,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-20 11:38:35,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 275 transitions, 1179 flow. Second operand has 32 states, 32 states have (on average 212.28125) internal successors, (6793), 32 states have internal predecessors, (6793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:35,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:35,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-20 11:38:35,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:37,789 INFO L130 PetriNetUnfolder]: 120/3824 cut-off events. [2022-11-20 11:38:37,790 INFO L131 PetriNetUnfolder]: For 2403/2429 co-relation queries the response was YES. [2022-11-20 11:38:37,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 3824 events. 120/3824 cut-off events. For 2403/2429 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 30439 event pairs, 0 based on Foata normal form. 24/3653 useless extension candidates. Maximal degree in co-relation 5714. Up to 98 conditions per place. [2022-11-20 11:38:37,824 INFO L137 encePairwiseOnDemand]: 237/249 looper letters, 208 selfloop transitions, 119 changer transitions 0/513 dead transitions. [2022-11-20 11:38:37,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 513 transitions, 2996 flow [2022-11-20 11:38:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 11:38:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-20 11:38:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 9498 transitions. [2022-11-20 11:38:37,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8669222343921139 [2022-11-20 11:38:37,838 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 9498 transitions. [2022-11-20 11:38:37,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 9498 transitions. [2022-11-20 11:38:37,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:37,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 9498 transitions. [2022-11-20 11:38:37,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 215.86363636363637) internal successors, (9498), 44 states have internal predecessors, (9498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:37,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:37,873 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:37,873 INFO L175 Difference]: Start difference. First operand has 375 places, 275 transitions, 1179 flow. Second operand 44 states and 9498 transitions. [2022-11-20 11:38:37,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 513 transitions, 2996 flow [2022-11-20 11:38:37,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 513 transitions, 2743 flow, removed 26 selfloop flow, removed 51 redundant places. [2022-11-20 11:38:37,898 INFO L231 Difference]: Finished difference. Result has 344 places, 343 transitions, 1793 flow [2022-11-20 11:38:37,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1793, PETRI_PLACES=344, PETRI_TRANSITIONS=343} [2022-11-20 11:38:37,899 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 143 predicate places. [2022-11-20 11:38:37,899 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 343 transitions, 1793 flow [2022-11-20 11:38:37,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 212.28125) internal successors, (6793), 32 states have internal predecessors, (6793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:37,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:37,901 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:37,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 11:38:38,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:38:38,107 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:38,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1553412178, now seen corresponding path program 2 times [2022-11-20 11:38:38,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:38,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003241347] [2022-11-20 11:38:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:38:38,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:38,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003241347] [2022-11-20 11:38:38,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003241347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719460583] [2022-11-20 11:38:38,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:38:38,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:38,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:38,252 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:38,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:38:38,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:38:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:38:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:38:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:38:38,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:38:38,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719460583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:38,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:38,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 11:38:38,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621096860] [2022-11-20 11:38:38,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:38,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:38,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:38,846 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 249 [2022-11-20 11:38:38,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 343 transitions, 1793 flow. Second operand has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:38,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:38,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 249 [2022-11-20 11:38:38,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:45,221 INFO L130 PetriNetUnfolder]: 7998/28043 cut-off events. [2022-11-20 11:38:45,222 INFO L131 PetriNetUnfolder]: For 4946/4959 co-relation queries the response was YES. [2022-11-20 11:38:45,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50203 conditions, 28043 events. 7998/28043 cut-off events. For 4946/4959 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 329096 event pairs, 741 based on Foata normal form. 325/24817 useless extension candidates. Maximal degree in co-relation 49599. Up to 3224 conditions per place. [2022-11-20 11:38:45,490 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 106 selfloop transitions, 15 changer transitions 0/430 dead transitions. [2022-11-20 11:38:45,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 430 transitions, 2260 flow [2022-11-20 11:38:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:38:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 11:38:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2736 transitions. [2022-11-20 11:38:45,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.845227062094532 [2022-11-20 11:38:45,499 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2736 transitions. [2022-11-20 11:38:45,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2736 transitions. [2022-11-20 11:38:45,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:45,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2736 transitions. [2022-11-20 11:38:45,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 210.46153846153845) internal successors, (2736), 13 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:45,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:45,509 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:45,510 INFO L175 Difference]: Start difference. First operand has 344 places, 343 transitions, 1793 flow. Second operand 13 states and 2736 transitions. [2022-11-20 11:38:45,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 430 transitions, 2260 flow [2022-11-20 11:38:45,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 430 transitions, 2178 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-11-20 11:38:45,555 INFO L231 Difference]: Finished difference. Result has 342 places, 347 transitions, 1768 flow [2022-11-20 11:38:45,556 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1768, PETRI_PLACES=342, PETRI_TRANSITIONS=347} [2022-11-20 11:38:45,556 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 141 predicate places. [2022-11-20 11:38:45,556 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 347 transitions, 1768 flow [2022-11-20 11:38:45,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:45,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:45,557 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:45,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 11:38:45,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:45,763 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash -911136616, now seen corresponding path program 1 times [2022-11-20 11:38:45,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490435900] [2022-11-20 11:38:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:45,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:38:45,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490435900] [2022-11-20 11:38:45,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490435900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731255754] [2022-11-20 11:38:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:45,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:45,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:45,907 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:45,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:38:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:38:46,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:38:46,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:38:46,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731255754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:46,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:38:46,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:38:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756623920] [2022-11-20 11:38:46,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:46,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:38:46,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:46,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:38:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:38:46,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-20 11:38:46,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 347 transitions, 1768 flow. Second operand has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:46,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:46,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-20 11:38:46,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:47,674 INFO L130 PetriNetUnfolder]: 627/6333 cut-off events. [2022-11-20 11:38:47,674 INFO L131 PetriNetUnfolder]: For 2098/2111 co-relation queries the response was YES. [2022-11-20 11:38:47,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11117 conditions, 6333 events. 627/6333 cut-off events. For 2098/2111 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 59593 event pairs, 0 based on Foata normal form. 65/6019 useless extension candidates. Maximal degree in co-relation 10547. Up to 728 conditions per place. [2022-11-20 11:38:47,753 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 29 selfloop transitions, 8 changer transitions 0/360 dead transitions. [2022-11-20 11:38:47,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 360 transitions, 1873 flow [2022-11-20 11:38:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:38:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:38:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1567 transitions. [2022-11-20 11:38:47,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8990246701090074 [2022-11-20 11:38:47,756 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1567 transitions. [2022-11-20 11:38:47,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1567 transitions. [2022-11-20 11:38:47,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:47,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1567 transitions. [2022-11-20 11:38:47,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 223.85714285714286) internal successors, (1567), 7 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:47,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:47,762 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:47,762 INFO L175 Difference]: Start difference. First operand has 342 places, 347 transitions, 1768 flow. Second operand 7 states and 1567 transitions. [2022-11-20 11:38:47,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 360 transitions, 1873 flow [2022-11-20 11:38:47,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 360 transitions, 1838 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-20 11:38:47,791 INFO L231 Difference]: Finished difference. Result has 337 places, 345 transitions, 1736 flow [2022-11-20 11:38:47,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=337, PETRI_TRANSITIONS=345} [2022-11-20 11:38:47,792 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 136 predicate places. [2022-11-20 11:38:47,793 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 345 transitions, 1736 flow [2022-11-20 11:38:47,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:47,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:47,793 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:47,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:47,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:47,999 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:38:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1694350768, now seen corresponding path program 2 times [2022-11-20 11:38:48,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:48,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762088555] [2022-11-20 11:38:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:38:48,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762088555] [2022-11-20 11:38:48,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762088555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364015913] [2022-11-20 11:38:48,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:38:48,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:48,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:48,126 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:48,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:38:48,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:38:48,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:38:48,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:38:48,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:38:48,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:38:48,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364015913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:48,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:48,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 11:38:48,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453651080] [2022-11-20 11:38:48,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:48,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:48,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 249 [2022-11-20 11:38:48,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 345 transitions, 1736 flow. Second operand has 10 states, 10 states have (on average 205.2) internal successors, (2052), 10 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:48,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:48,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 249 [2022-11-20 11:38:48,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:03,381 INFO L130 PetriNetUnfolder]: 18736/58827 cut-off events. [2022-11-20 11:39:03,381 INFO L131 PetriNetUnfolder]: For 16321/17413 co-relation queries the response was YES. [2022-11-20 11:39:03,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107890 conditions, 58827 events. 18736/58827 cut-off events. For 16321/17413 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 758279 event pairs, 1599 based on Foata normal form. 1846/55107 useless extension candidates. Maximal degree in co-relation 107294. Up to 6981 conditions per place. [2022-11-20 11:39:03,983 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 113 selfloop transitions, 15 changer transitions 0/438 dead transitions. [2022-11-20 11:39:03,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 438 transitions, 2262 flow [2022-11-20 11:39:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:39:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 11:39:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2733 transitions. [2022-11-20 11:39:03,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8443002780352178 [2022-11-20 11:39:03,988 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2733 transitions. [2022-11-20 11:39:03,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2733 transitions. [2022-11-20 11:39:03,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:03,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2733 transitions. [2022-11-20 11:39:03,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 210.23076923076923) internal successors, (2733), 13 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:03,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:03,999 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:04,000 INFO L175 Difference]: Start difference. First operand has 337 places, 345 transitions, 1736 flow. Second operand 13 states and 2733 transitions. [2022-11-20 11:39:04,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 438 transitions, 2262 flow [2022-11-20 11:39:04,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 438 transitions, 2246 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 11:39:04,135 INFO L231 Difference]: Finished difference. Result has 344 places, 349 transitions, 1777 flow [2022-11-20 11:39:04,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1777, PETRI_PLACES=344, PETRI_TRANSITIONS=349} [2022-11-20 11:39:04,136 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 143 predicate places. [2022-11-20 11:39:04,137 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 349 transitions, 1777 flow [2022-11-20 11:39:04,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.2) internal successors, (2052), 10 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:04,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:04,138 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:04,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 11:39:04,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:04,344 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:39:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:04,345 INFO L85 PathProgramCache]: Analyzing trace with hash -985265572, now seen corresponding path program 1 times [2022-11-20 11:39:04,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:04,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451668833] [2022-11-20 11:39:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:04,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:39:04,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451668833] [2022-11-20 11:39:04,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451668833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:04,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563711396] [2022-11-20 11:39:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:04,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:04,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:04,495 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:04,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:39:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:04,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:39:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:39:04,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:39:04,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563711396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:04,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:39:04,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:39:04,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473439133] [2022-11-20 11:39:04,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:04,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:39:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:39:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:39:04,730 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-20 11:39:04,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 349 transitions, 1777 flow. Second operand has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:04,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:04,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-20 11:39:04,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:10,065 INFO L130 PetriNetUnfolder]: 4397/17812 cut-off events. [2022-11-20 11:39:10,065 INFO L131 PetriNetUnfolder]: For 8789/8867 co-relation queries the response was YES. [2022-11-20 11:39:10,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31177 conditions, 17812 events. 4397/17812 cut-off events. For 8789/8867 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 232936 event pairs, 0 based on Foata normal form. 234/14144 useless extension candidates. Maximal degree in co-relation 30581. Up to 3770 conditions per place. [2022-11-20 11:39:10,249 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 0 selfloop transitions, 0 changer transitions 119/360 dead transitions. [2022-11-20 11:39:10,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 360 transitions, 1867 flow [2022-11-20 11:39:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:39:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1565 transitions. [2022-11-20 11:39:10,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.897877223178428 [2022-11-20 11:39:10,252 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1565 transitions. [2022-11-20 11:39:10,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1565 transitions. [2022-11-20 11:39:10,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:10,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1565 transitions. [2022-11-20 11:39:10,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 223.57142857142858) internal successors, (1565), 7 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:10,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:10,257 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:10,257 INFO L175 Difference]: Start difference. First operand has 344 places, 349 transitions, 1777 flow. Second operand 7 states and 1565 transitions. [2022-11-20 11:39:10,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 360 transitions, 1867 flow [2022-11-20 11:39:10,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 360 transitions, 1832 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-20 11:39:10,316 INFO L231 Difference]: Finished difference. Result has 339 places, 241 transitions, 1451 flow [2022-11-20 11:39:10,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1451, PETRI_PLACES=339, PETRI_TRANSITIONS=241} [2022-11-20 11:39:10,317 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 138 predicate places. [2022-11-20 11:39:10,317 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 241 transitions, 1451 flow [2022-11-20 11:39:10,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:10,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:10,318 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:10,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:10,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e442c7d-d7d7-4418-9d84-2c662bd1b9c5/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:39:10,523 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-20 11:39:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 429528605, now seen corresponding path program 2 times [2022-11-20 11:39:10,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534220599] [2022-11-20 11:39:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:10,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat