./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3307686edde000bd6f2709f8ce62af668302d3bc ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:06:05,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:05,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:05,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:05,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:05,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:05,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:05,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:05,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:05,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:05,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:05,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:05,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:05,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:05,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:05,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:05,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:05,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:05,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:05,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:05,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:05,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:05,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:05,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:05,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:05,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:05,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:05,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:05,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:05,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:05,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:05,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:05,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:05,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:05,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:05,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:05,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:05,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:05,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:05,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:05,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:05,571 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:06:05,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:05,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:05,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:05,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:05,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:05,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:05,604 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:05,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:05,604 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:05,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:05,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:05,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:05,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:06:05,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:05,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:06:05,606 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:05,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:06:05,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:05,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:06:05,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:05,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:05,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:05,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:05,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:05,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:05,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:06:05,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:05,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:05,610 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:06:05,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:06:05,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:06:05,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:05,611 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_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3307686edde000bd6f2709f8ce62af668302d3bc [2021-10-15 19:06:05,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:05,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:05,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:05,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:05,902 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:05,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-10-15 19:06:05,985 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/data/ce51d0b2d/67c1e91b8de84b14affa591b616249f8/FLAG794d0317e [2021-10-15 19:06:06,400 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:06,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-10-15 19:06:06,406 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/data/ce51d0b2d/67c1e91b8de84b14affa591b616249f8/FLAG794d0317e [2021-10-15 19:06:06,799 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/data/ce51d0b2d/67c1e91b8de84b14affa591b616249f8 [2021-10-15 19:06:06,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:06,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:06:06,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:06,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:06,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:06,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:06,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@686883e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:06, skipping insertion in model container [2021-10-15 19:06:06,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:06" (1/1) ... [2021-10-15 19:06:06,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:06,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:06,995 WARN L228 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_add26293-a3a5-459a-9604-c5fdcc9748ee/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2021-10-15 19:06:07,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:07,032 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:07,041 WARN L228 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_add26293-a3a5-459a-9604-c5fdcc9748ee/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2021-10-15 19:06:07,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:07,055 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:07,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07 WrapperNode [2021-10-15 19:06:07,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:07,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:07,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:06:07,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:06:07,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:07,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:07,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:07,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:07,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:07,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:07,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:07,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:07,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (1/1) ... [2021-10-15 19:06:07,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:07,179 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:07,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:07,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:06:07,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:07,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:07,428 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-15 19:06:07,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:07 BoogieIcfgContainer [2021-10-15 19:06:07,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:07,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:07,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:07,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:07,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:06" (1/3) ... [2021-10-15 19:06:07,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f772edd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:07, skipping insertion in model container [2021-10-15 19:06:07,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:07" (2/3) ... [2021-10-15 19:06:07,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f772edd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:07, skipping insertion in model container [2021-10-15 19:06:07,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:07" (3/3) ... [2021-10-15 19:06:07,439 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2021-10-15 19:06:07,444 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:07,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:06:07,492 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:07,499 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:06:07,500 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:06:07,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 16 transitions, 32 flow [2021-10-15 19:06:07,527 INFO L129 PetriNetUnfolder]: 5/16 cut-off events. [2021-10-15 19:06:07,528 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:07,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 16 events. 5/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:06:07,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 12 places, 16 transitions, 32 flow [2021-10-15 19:06:07,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 9 places, 12 transitions, 24 flow [2021-10-15 19:06:07,537 INFO L129 PetriNetUnfolder]: 4/11 cut-off events. [2021-10-15 19:06:07,537 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:07,537 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:07,538 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:06:07,539 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:07,544 INFO L82 PathProgramCache]: Analyzing trace with hash 890153191, now seen corresponding path program 1 times [2021-10-15 19:06:07,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:07,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504398216] [2021-10-15 19:06:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:07,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:07,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:07,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504398216] [2021-10-15 19:06:07,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504398216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:07,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:07,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:07,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056232808] [2021-10-15 19:06:07,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:06:07,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:06:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:06:07,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 16 [2021-10-15 19:06:07,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 9 places, 12 transitions, 24 flow. Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:07,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:07,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 16 [2021-10-15 19:06:07,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:07,843 INFO L129 PetriNetUnfolder]: 2/10 cut-off events. [2021-10-15 19:06:07,843 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:07,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/10 useless extension candidates. Maximal degree in co-relation 10. Up to 2 conditions per place. [2021-10-15 19:06:07,845 INFO L132 encePairwiseOnDemand]: 14/16 looper letters, 0 selfloop transitions, 0 changer transitions 0/10 dead transitions. [2021-10-15 19:06:07,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 10 transitions, 20 flow [2021-10-15 19:06:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:06:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:06:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 28 transitions. [2021-10-15 19:06:07,857 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875 [2021-10-15 19:06:07,858 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 28 transitions. [2021-10-15 19:06:07,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 28 transitions. [2021-10-15 19:06:07,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:07,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 28 transitions. [2021-10-15 19:06:07,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:07,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:07,868 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:07,870 INFO L186 Difference]: Start difference. First operand has 9 places, 12 transitions, 24 flow. Second operand 2 states and 28 transitions. [2021-10-15 19:06:07,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 10 transitions, 20 flow [2021-10-15 19:06:07,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 10 transitions, 20 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:07,877 INFO L242 Difference]: Finished difference. Result has 10 places, 10 transitions, 20 flow [2021-10-15 19:06:07,879 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=10, PETRI_TRANSITIONS=10} [2021-10-15 19:06:07,880 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 1 predicate places. [2021-10-15 19:06:07,881 INFO L470 AbstractCegarLoop]: Abstraction has has 10 places, 10 transitions, 20 flow [2021-10-15 19:06:07,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:07,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:07,882 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:06:07,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:06:07,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-10-15 19:06:07,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:07,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93345004] [2021-10-15 19:06:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:07,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:08,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93345004] [2021-10-15 19:06:08,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93345004] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255417692] [2021-10-15 19:06:08,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,049 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 16 [2021-10-15 19:06:08,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 10 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 16 [2021-10-15 19:06:08,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,080 INFO L129 PetriNetUnfolder]: 3/14 cut-off events. [2021-10-15 19:06:08,080 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:08,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 14 events. 3/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 21. Up to 6 conditions per place. [2021-10-15 19:06:08,082 INFO L132 encePairwiseOnDemand]: 13/16 looper letters, 5 selfloop transitions, 2 changer transitions 0/12 dead transitions. [2021-10-15 19:06:08,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 12 transitions, 38 flow [2021-10-15 19:06:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2021-10-15 19:06:08,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-10-15 19:06:08,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 32 transitions. [2021-10-15 19:06:08,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 32 transitions. [2021-10-15 19:06:08,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 32 transitions. [2021-10-15 19:06:08,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,095 INFO L186 Difference]: Start difference. First operand has 10 places, 10 transitions, 20 flow. Second operand 3 states and 32 transitions. [2021-10-15 19:06:08,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 12 transitions, 38 flow [2021-10-15 19:06:08,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 12 transitions, 38 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:08,100 INFO L242 Difference]: Finished difference. Result has 13 places, 11 transitions, 32 flow [2021-10-15 19:06:08,101 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=13, PETRI_TRANSITIONS=11} [2021-10-15 19:06:08,105 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 4 predicate places. [2021-10-15 19:06:08,105 INFO L470 AbstractCegarLoop]: Abstraction has has 13 places, 11 transitions, 32 flow [2021-10-15 19:06:08,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,106 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:06:08,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,107 INFO L82 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2021-10-15 19:06:08,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300265480] [2021-10-15 19:06:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:08,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300265480] [2021-10-15 19:06:08,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300265480] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:08,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:08,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:08,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764156874] [2021-10-15 19:06:08,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:08,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:08,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 16 [2021-10-15 19:06:08,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 11 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 16 [2021-10-15 19:06:08,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,227 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2021-10-15 19:06:08,227 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:06:08,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 16 events. 3/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 30. Up to 7 conditions per place. [2021-10-15 19:06:08,228 INFO L132 encePairwiseOnDemand]: 12/16 looper letters, 3 selfloop transitions, 3 changer transitions 0/13 dead transitions. [2021-10-15 19:06:08,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 13 transitions, 48 flow [2021-10-15 19:06:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2021-10-15 19:06:08,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2021-10-15 19:06:08,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 34 transitions. [2021-10-15 19:06:08,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 34 transitions. [2021-10-15 19:06:08,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 34 transitions. [2021-10-15 19:06:08,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,235 INFO L186 Difference]: Start difference. First operand has 13 places, 11 transitions, 32 flow. Second operand 3 states and 34 transitions. [2021-10-15 19:06:08,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 13 transitions, 48 flow [2021-10-15 19:06:08,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 13 transitions, 46 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:08,237 INFO L242 Difference]: Finished difference. Result has 16 places, 13 transitions, 52 flow [2021-10-15 19:06:08,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=16, PETRI_TRANSITIONS=13} [2021-10-15 19:06:08,238 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 7 predicate places. [2021-10-15 19:06:08,238 INFO L470 AbstractCegarLoop]: Abstraction has has 16 places, 13 transitions, 52 flow [2021-10-15 19:06:08,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,239 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:06:08,239 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2021-10-15 19:06:08,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637684977] [2021-10-15 19:06:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:08,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637684977] [2021-10-15 19:06:08,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637684977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:08,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752418227] [2021-10-15 19:06:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:08,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:08,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:08,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:06:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:06:08,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:08,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752418227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:08,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:08,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-15 19:06:08,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497137890] [2021-10-15 19:06:08,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:06:08,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:06:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:06:08,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 16 [2021-10-15 19:06:08,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 13 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:08,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 16 [2021-10-15 19:06:08,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:08,542 INFO L129 PetriNetUnfolder]: 4/24 cut-off events. [2021-10-15 19:06:08,543 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 19:06:08,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 24 events. 4/24 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 1/22 useless extension candidates. Maximal degree in co-relation 72. Up to 13 conditions per place. [2021-10-15 19:06:08,544 INFO L132 encePairwiseOnDemand]: 10/16 looper letters, 10 selfloop transitions, 11 changer transitions 0/24 dead transitions. [2021-10-15 19:06:08,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 144 flow [2021-10-15 19:06:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:06:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:06:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2021-10-15 19:06:08,546 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.53125 [2021-10-15 19:06:08,547 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 85 transitions. [2021-10-15 19:06:08,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 85 transitions. [2021-10-15 19:06:08,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:08,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 85 transitions. [2021-10-15 19:06:08,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,550 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,551 INFO L186 Difference]: Start difference. First operand has 16 places, 13 transitions, 52 flow. Second operand 10 states and 85 transitions. [2021-10-15 19:06:08,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 144 flow [2021-10-15 19:06:08,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:08,554 INFO L242 Difference]: Finished difference. Result has 27 places, 20 transitions, 122 flow [2021-10-15 19:06:08,554 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=122, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2021-10-15 19:06:08,554 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 18 predicate places. [2021-10-15 19:06:08,554 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 122 flow [2021-10-15 19:06:08,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:08,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:08,555 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:08,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:08,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:08,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash 311415160, now seen corresponding path program 2 times [2021-10-15 19:06:08,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:08,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452030704] [2021-10-15 19:06:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:08,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:06:08,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:08,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452030704] [2021-10-15 19:06:08,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452030704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:08,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522564938] [2021-10-15 19:06:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:06:08,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:08,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:08,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:08,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:06:08,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:06:08,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:06:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:06:09,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522564938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:09,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:09,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-15 19:06:09,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445660075] [2021-10-15 19:06:09,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:06:09,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:09,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:06:09,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:06:09,058 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 16 [2021-10-15 19:06:09,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:09,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 16 [2021-10-15 19:06:09,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:09,239 INFO L129 PetriNetUnfolder]: 5/34 cut-off events. [2021-10-15 19:06:09,239 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-10-15 19:06:09,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 34 events. 5/34 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 155. Up to 21 conditions per place. [2021-10-15 19:06:09,242 INFO L132 encePairwiseOnDemand]: 10/16 looper letters, 12 selfloop transitions, 19 changer transitions 0/34 dead transitions. [2021-10-15 19:06:09,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 310 flow [2021-10-15 19:06:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:06:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:06:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 138 transitions. [2021-10-15 19:06:09,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5073529411764706 [2021-10-15 19:06:09,251 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 138 transitions. [2021-10-15 19:06:09,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 138 transitions. [2021-10-15 19:06:09,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:09,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 138 transitions. [2021-10-15 19:06:09,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.117647058823529) internal successors, (138), 17 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,259 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,259 INFO L186 Difference]: Start difference. First operand has 27 places, 20 transitions, 122 flow. Second operand 17 states and 138 transitions. [2021-10-15 19:06:09,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 310 flow [2021-10-15 19:06:09,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 284 flow, removed 12 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:09,269 INFO L242 Difference]: Finished difference. Result has 47 places, 28 transitions, 232 flow [2021-10-15 19:06:09,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=232, PETRI_PLACES=47, PETRI_TRANSITIONS=28} [2021-10-15 19:06:09,270 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 38 predicate places. [2021-10-15 19:06:09,270 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 28 transitions, 232 flow [2021-10-15 19:06:09,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:09,271 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:09,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:09,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:09,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1517479077, now seen corresponding path program 3 times [2021-10-15 19:06:09,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:09,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962292781] [2021-10-15 19:06:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:09,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-10-15 19:06:09,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:09,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962292781] [2021-10-15 19:06:09,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962292781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:09,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516993304] [2021-10-15 19:06:09,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:06:09,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:09,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:09,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:06:09,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-15 19:06:09,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:06:09,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-15 19:06:09,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516993304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:09,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:09,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-15 19:06:09,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228175898] [2021-10-15 19:06:09,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:06:09,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:06:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:06:09,849 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 16 [2021-10-15 19:06:09,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 28 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:09,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 16 [2021-10-15 19:06:09,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:09,885 INFO L129 PetriNetUnfolder]: 5/38 cut-off events. [2021-10-15 19:06:09,885 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2021-10-15 19:06:09,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 38 events. 5/38 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 235. Up to 21 conditions per place. [2021-10-15 19:06:09,887 INFO L132 encePairwiseOnDemand]: 12/16 looper letters, 3 selfloop transitions, 17 changer transitions 0/29 dead transitions. [2021-10-15 19:06:09,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 29 transitions, 290 flow [2021-10-15 19:06:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:06:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:06:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2021-10-15 19:06:09,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-10-15 19:06:09,888 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 64 transitions. [2021-10-15 19:06:09,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 64 transitions. [2021-10-15 19:06:09,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:09,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 64 transitions. [2021-10-15 19:06:09,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,891 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,891 INFO L186 Difference]: Start difference. First operand has 47 places, 28 transitions, 232 flow. Second operand 6 states and 64 transitions. [2021-10-15 19:06:09,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 29 transitions, 290 flow [2021-10-15 19:06:09,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 29 transitions, 218 flow, removed 22 selfloop flow, removed 9 redundant places. [2021-10-15 19:06:09,898 INFO L242 Difference]: Finished difference. Result has 44 places, 29 transitions, 221 flow [2021-10-15 19:06:09,899 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2021-10-15 19:06:09,899 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 35 predicate places. [2021-10-15 19:06:09,899 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 221 flow [2021-10-15 19:06:09,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:09,900 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:09,900 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:09,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:10,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:10,115 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash 640077219, now seen corresponding path program 4 times [2021-10-15 19:06:10,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:10,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291587960] [2021-10-15 19:06:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:10,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-15 19:06:10,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:10,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291587960] [2021-10-15 19:06:10,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291587960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:10,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064064587] [2021-10-15 19:06:10,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:06:10,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:10,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:10,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:10,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:06:10,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:06:10,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:10,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:06:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:06:10,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064064587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:10,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:10,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-15 19:06:10,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380301543] [2021-10-15 19:06:10,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:06:10,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:06:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:06:10,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 16 [2021-10-15 19:06:10,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 221 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:10,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:10,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 16 [2021-10-15 19:06:10,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:10,911 INFO L129 PetriNetUnfolder]: 6/51 cut-off events. [2021-10-15 19:06:10,912 INFO L130 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2021-10-15 19:06:10,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 51 events. 6/51 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 349. Up to 26 conditions per place. [2021-10-15 19:06:10,914 INFO L132 encePairwiseOnDemand]: 10/16 looper letters, 15 selfloop transitions, 34 changer transitions 0/51 dead transitions. [2021-10-15 19:06:10,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 51 transitions, 698 flow [2021-10-15 19:06:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-15 19:06:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-15 19:06:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 179 transitions. [2021-10-15 19:06:10,924 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36088709677419356 [2021-10-15 19:06:10,924 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 179 transitions. [2021-10-15 19:06:10,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 179 transitions. [2021-10-15 19:06:10,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:10,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 179 transitions. [2021-10-15 19:06:10,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 5.774193548387097) internal successors, (179), 31 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:10,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 16.0) internal successors, (512), 32 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:10,928 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 16.0) internal successors, (512), 32 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:10,928 INFO L186 Difference]: Start difference. First operand has 44 places, 29 transitions, 221 flow. Second operand 31 states and 179 transitions. [2021-10-15 19:06:10,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 51 transitions, 698 flow [2021-10-15 19:06:10,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 51 transitions, 578 flow, removed 45 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:10,935 INFO L242 Difference]: Finished difference. Result has 77 places, 43 transitions, 426 flow [2021-10-15 19:06:10,936 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=426, PETRI_PLACES=77, PETRI_TRANSITIONS=43} [2021-10-15 19:06:10,936 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 68 predicate places. [2021-10-15 19:06:10,936 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 43 transitions, 426 flow [2021-10-15 19:06:10,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:10,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:10,937 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:10,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:11,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:11,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:11,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1035828652, now seen corresponding path program 5 times [2021-10-15 19:06:11,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:11,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805953606] [2021-10-15 19:06:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:11,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-10-15 19:06:11,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:11,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805953606] [2021-10-15 19:06:11,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805953606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:11,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860665953] [2021-10-15 19:06:11,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:06:11,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:11,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:11,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:11,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:06:11,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-15 19:06:11,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:06:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-10-15 19:06:11,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860665953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:11,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:11,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-15 19:06:11,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208349677] [2021-10-15 19:06:11,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:06:11,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:06:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:06:11,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 16 [2021-10-15 19:06:11,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 43 transitions, 426 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:11,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:11,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 16 [2021-10-15 19:06:11,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:11,574 INFO L129 PetriNetUnfolder]: 6/56 cut-off events. [2021-10-15 19:06:11,575 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2021-10-15 19:06:11,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 56 events. 6/56 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 454. Up to 26 conditions per place. [2021-10-15 19:06:11,576 INFO L132 encePairwiseOnDemand]: 12/16 looper letters, 3 selfloop transitions, 31 changer transitions 0/44 dead transitions. [2021-10-15 19:06:11,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 44 transitions, 524 flow [2021-10-15 19:06:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:06:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:06:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2021-10-15 19:06:11,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.65625 [2021-10-15 19:06:11,578 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 84 transitions. [2021-10-15 19:06:11,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 84 transitions. [2021-10-15 19:06:11,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:11,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 84 transitions. [2021-10-15 19:06:11,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:11,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:11,580 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:11,580 INFO L186 Difference]: Start difference. First operand has 77 places, 43 transitions, 426 flow. Second operand 8 states and 84 transitions. [2021-10-15 19:06:11,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 44 transitions, 524 flow [2021-10-15 19:06:11,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 44 transitions, 352 flow, removed 53 selfloop flow, removed 18 redundant places. [2021-10-15 19:06:11,592 INFO L242 Difference]: Finished difference. Result has 67 places, 44 transitions, 356 flow [2021-10-15 19:06:11,592 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=356, PETRI_PLACES=67, PETRI_TRANSITIONS=44} [2021-10-15 19:06:11,593 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 58 predicate places. [2021-10-15 19:06:11,593 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 44 transitions, 356 flow [2021-10-15 19:06:11,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:11,594 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:11,594 INFO L254 CegarLoopForPetriNet]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:11,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:11,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:11,809 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash -294987944, now seen corresponding path program 6 times [2021-10-15 19:06:11,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:11,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922250849] [2021-10-15 19:06:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:11,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-15 19:06:11,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:11,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922250849] [2021-10-15 19:06:11,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922250849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:11,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560058562] [2021-10-15 19:06:11,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:06:11,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:11,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:11,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:11,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:06:12,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-15 19:06:12,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:06:12,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-10-15 19:06:12,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560058562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:12,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:12,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-15 19:06:12,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170004828] [2021-10-15 19:06:12,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:06:12,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:06:12,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:06:12,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 16 [2021-10-15 19:06:12,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 44 transitions, 356 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:12,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:12,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 16 [2021-10-15 19:06:12,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:12,448 INFO L129 PetriNetUnfolder]: 6/61 cut-off events. [2021-10-15 19:06:12,448 INFO L130 PetriNetUnfolder]: For 495/495 co-relation queries the response was YES. [2021-10-15 19:06:12,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 61 events. 6/61 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 503. Up to 26 conditions per place. [2021-10-15 19:06:12,451 INFO L132 encePairwiseOnDemand]: 12/16 looper letters, 3 selfloop transitions, 32 changer transitions 0/45 dead transitions. [2021-10-15 19:06:12,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 45 transitions, 458 flow [2021-10-15 19:06:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:06:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:06:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2021-10-15 19:06:12,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2021-10-15 19:06:12,453 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 94 transitions. [2021-10-15 19:06:12,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 94 transitions. [2021-10-15 19:06:12,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:12,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 94 transitions. [2021-10-15 19:06:12,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:12,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:12,456 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:12,456 INFO L186 Difference]: Start difference. First operand has 67 places, 44 transitions, 356 flow. Second operand 9 states and 94 transitions. [2021-10-15 19:06:12,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 45 transitions, 458 flow [2021-10-15 19:06:12,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 45 transitions, 378 flow, removed 15 selfloop flow, removed 5 redundant places. [2021-10-15 19:06:12,467 INFO L242 Difference]: Finished difference. Result has 71 places, 45 transitions, 378 flow [2021-10-15 19:06:12,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=378, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2021-10-15 19:06:12,468 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 62 predicate places. [2021-10-15 19:06:12,468 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 378 flow [2021-10-15 19:06:12,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:12,470 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:12,470 INFO L254 CegarLoopForPetriNet]: trace histogram [28, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:12,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:12,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 19:06:12,681 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1517248044, now seen corresponding path program 7 times [2021-10-15 19:06:12,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:12,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029168936] [2021-10-15 19:06:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:12,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-15 19:06:12,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:12,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029168936] [2021-10-15 19:06:12,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029168936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:12,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305997210] [2021-10-15 19:06:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:06:12,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:12,826 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:12,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:06:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:12,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:06:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 330 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-15 19:06:13,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305997210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:13,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:13,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-15 19:06:13,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816978702] [2021-10-15 19:06:13,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:06:13,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:13,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:06:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:06:13,157 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 16 [2021-10-15 19:06:13,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:13,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:13,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 16 [2021-10-15 19:06:13,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:13,219 INFO L129 PetriNetUnfolder]: 6/66 cut-off events. [2021-10-15 19:06:13,220 INFO L130 PetriNetUnfolder]: For 582/582 co-relation queries the response was YES. [2021-10-15 19:06:13,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 574 conditions, 66 events. 6/66 cut-off events. For 582/582 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 548. Up to 26 conditions per place. [2021-10-15 19:06:13,221 INFO L132 encePairwiseOnDemand]: 12/16 looper letters, 3 selfloop transitions, 33 changer transitions 0/46 dead transitions. [2021-10-15 19:06:13,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 46 transitions, 484 flow [2021-10-15 19:06:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:06:13,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:06:13,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2021-10-15 19:06:13,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.65 [2021-10-15 19:06:13,223 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 104 transitions. [2021-10-15 19:06:13,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 104 transitions. [2021-10-15 19:06:13,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:13,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 104 transitions. [2021-10-15 19:06:13,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:13,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:13,225 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:13,225 INFO L186 Difference]: Start difference. First operand has 71 places, 45 transitions, 378 flow. Second operand 10 states and 104 transitions. [2021-10-15 19:06:13,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 46 transitions, 484 flow [2021-10-15 19:06:13,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 46 transitions, 390 flow, removed 16 selfloop flow, removed 7 redundant places. [2021-10-15 19:06:13,236 INFO L242 Difference]: Finished difference. Result has 74 places, 46 transitions, 390 flow [2021-10-15 19:06:13,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=74, PETRI_TRANSITIONS=46} [2021-10-15 19:06:13,237 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 65 predicate places. [2021-10-15 19:06:13,237 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 46 transitions, 390 flow [2021-10-15 19:06:13,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:13,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:13,237 INFO L254 CegarLoopForPetriNet]: trace histogram [32, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:13,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:13,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:06:13,457 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash -750680872, now seen corresponding path program 8 times [2021-10-15 19:06:13,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:13,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311971983] [2021-10-15 19:06:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:13,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 247 proven. 36 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-10-15 19:06:13,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:13,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311971983] [2021-10-15 19:06:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311971983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:13,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121569044] [2021-10-15 19:06:13,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:06:13,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:13,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:13,634 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:13,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:06:13,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:06:13,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:13,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:06:13,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-15 19:06:13,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121569044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:13,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:13,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-10-15 19:06:13,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939361097] [2021-10-15 19:06:13,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 19:06:13,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 19:06:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:06:13,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 16 [2021-10-15 19:06:13,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 46 transitions, 390 flow. Second operand has 16 states, 16 states have (on average 8.1875) internal successors, (131), 16 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:13,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:13,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 16 [2021-10-15 19:06:13,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:14,959 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2021-10-15 19:06:14,959 INFO L130 PetriNetUnfolder]: For 777/777 co-relation queries the response was YES. [2021-10-15 19:06:14,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 84 events. 7/84 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 712. Up to 31 conditions per place. [2021-10-15 19:06:14,961 INFO L132 encePairwiseOnDemand]: 10/16 looper letters, 16 selfloop transitions, 65 changer transitions 0/84 dead transitions. [2021-10-15 19:06:14,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 84 transitions, 1424 flow [2021-10-15 19:06:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-15 19:06:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-10-15 19:06:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 454 transitions. [2021-10-15 19:06:14,965 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4651639344262295 [2021-10-15 19:06:14,965 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 454 transitions. [2021-10-15 19:06:14,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 454 transitions. [2021-10-15 19:06:14,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:14,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 454 transitions. [2021-10-15 19:06:14,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 7.442622950819672) internal successors, (454), 61 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:14,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 16.0) internal successors, (992), 62 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:14,973 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 16.0) internal successors, (992), 62 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:14,973 INFO L186 Difference]: Start difference. First operand has 74 places, 46 transitions, 390 flow. Second operand 61 states and 454 transitions. [2021-10-15 19:06:14,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 84 transitions, 1424 flow [2021-10-15 19:06:14,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 84 transitions, 1124 flow, removed 102 selfloop flow, removed 8 redundant places. [2021-10-15 19:06:14,988 INFO L242 Difference]: Finished difference. Result has 133 places, 74 transitions, 776 flow [2021-10-15 19:06:14,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=776, PETRI_PLACES=133, PETRI_TRANSITIONS=74} [2021-10-15 19:06:14,989 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 124 predicate places. [2021-10-15 19:06:14,989 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 74 transitions, 776 flow [2021-10-15 19:06:14,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.1875) internal successors, (131), 16 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:14,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:14,990 INFO L254 CegarLoopForPetriNet]: trace histogram [45, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:15,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:15,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:06:15,214 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash -75863613, now seen corresponding path program 9 times [2021-10-15 19:06:15,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:15,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50414904] [2021-10-15 19:06:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:15,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 405 proven. 45 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-10-15 19:06:15,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:15,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50414904] [2021-10-15 19:06:15,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50414904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:15,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112645280] [2021-10-15 19:06:15,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:06:15,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:15,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:15,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:06:15,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-15 19:06:15,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:15,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:06:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 405 proven. 45 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-10-15 19:06:15,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112645280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:15,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:15,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-15 19:06:15,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291257868] [2021-10-15 19:06:15,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:06:15,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:06:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:06:15,867 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 16 [2021-10-15 19:06:15,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 74 transitions, 776 flow. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:15,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:15,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 16 [2021-10-15 19:06:15,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:15,968 INFO L129 PetriNetUnfolder]: 7/90 cut-off events. [2021-10-15 19:06:15,968 INFO L130 PetriNetUnfolder]: For 964/964 co-relation queries the response was YES. [2021-10-15 19:06:15,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 90 events. 7/90 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 851. Up to 31 conditions per place. [2021-10-15 19:06:15,970 INFO L132 encePairwiseOnDemand]: 12/16 looper letters, 3 selfloop transitions, 61 changer transitions 0/75 dead transitions. [2021-10-15 19:06:15,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 75 transitions, 952 flow [2021-10-15 19:06:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:06:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:06:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2021-10-15 19:06:15,972 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2021-10-15 19:06:15,972 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 124 transitions. [2021-10-15 19:06:15,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 124 transitions. [2021-10-15 19:06:15,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:15,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 124 transitions. [2021-10-15 19:06:15,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:15,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 16.0) internal successors, (208), 13 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:15,975 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 16.0) internal successors, (208), 13 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:15,975 INFO L186 Difference]: Start difference. First operand has 133 places, 74 transitions, 776 flow. Second operand 12 states and 124 transitions. [2021-10-15 19:06:15,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 75 transitions, 952 flow [2021-10-15 19:06:15,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 75 transitions, 600 flow, removed 112 selfloop flow, removed 34 redundant places. [2021-10-15 19:06:15,997 INFO L242 Difference]: Finished difference. Result has 111 places, 75 transitions, 605 flow [2021-10-15 19:06:15,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=605, PETRI_PLACES=111, PETRI_TRANSITIONS=75} [2021-10-15 19:06:15,998 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 102 predicate places. [2021-10-15 19:06:15,998 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 75 transitions, 605 flow [2021-10-15 19:06:15,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:15,999 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:15,999 INFO L254 CegarLoopForPetriNet]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:16,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:16,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:06:16,221 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:16,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:16,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1313015549, now seen corresponding path program 10 times [2021-10-15 19:06:16,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:16,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652201916] [2021-10-15 19:06:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:16,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-10-15 19:06:16,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:16,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652201916] [2021-10-15 19:06:16,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652201916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:16,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60538766] [2021-10-15 19:06:16,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:06:16,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:16,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:16,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:06:16,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:06:16,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:16,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:06:16,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-10-15 19:06:17,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60538766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:17,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:17,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-10-15 19:06:17,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851197418] [2021-10-15 19:06:17,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:06:17,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:06:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:06:17,004 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 16 [2021-10-15 19:06:17,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 75 transitions, 605 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:17,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 16 [2021-10-15 19:06:17,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:17,095 INFO L129 PetriNetUnfolder]: 8/104 cut-off events. [2021-10-15 19:06:17,095 INFO L130 PetriNetUnfolder]: For 1845/1845 co-relation queries the response was YES. [2021-10-15 19:06:17,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 104 events. 8/104 cut-off events. For 1845/1845 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 16 event pairs, 0 based on Foata normal form. 1/98 useless extension candidates. Maximal degree in co-relation 811. Up to 29 conditions per place. [2021-10-15 19:06:17,097 INFO L132 encePairwiseOnDemand]: 13/16 looper letters, 11 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2021-10-15 19:06:17,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 77 transitions, 661 flow [2021-10-15 19:06:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:06:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:06:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2021-10-15 19:06:17,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2021-10-15 19:06:17,098 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 67 transitions. [2021-10-15 19:06:17,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 67 transitions. [2021-10-15 19:06:17,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:17,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 67 transitions. [2021-10-15 19:06:17,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,100 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,100 INFO L186 Difference]: Start difference. First operand has 111 places, 75 transitions, 605 flow. Second operand 8 states and 67 transitions. [2021-10-15 19:06:17,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 77 transitions, 661 flow [2021-10-15 19:06:17,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 77 transitions, 504 flow, removed 24 selfloop flow, removed 9 redundant places. [2021-10-15 19:06:17,123 INFO L242 Difference]: Finished difference. Result has 110 places, 76 transitions, 481 flow [2021-10-15 19:06:17,123 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=481, PETRI_PLACES=110, PETRI_TRANSITIONS=76} [2021-10-15 19:06:17,124 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 101 predicate places. [2021-10-15 19:06:17,124 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 76 transitions, 481 flow [2021-10-15 19:06:17,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:17,124 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:17,124 INFO L254 CegarLoopForPetriNet]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:17,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:17,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:17,341 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:17,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2025848776, now seen corresponding path program 11 times [2021-10-15 19:06:17,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:17,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521562324] [2021-10-15 19:06:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:17,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-10-15 19:06:17,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:17,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521562324] [2021-10-15 19:06:17,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521562324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:17,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213298424] [2021-10-15 19:06:17,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:06:17,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:17,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:17,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:17,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:06:19,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-10-15 19:06:19,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:19,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:06:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-10-15 19:06:19,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213298424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:19,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:06:19,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-15 19:06:19,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664619492] [2021-10-15 19:06:19,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:06:19,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:06:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:06:19,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 16 [2021-10-15 19:06:19,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 76 transitions, 481 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:19,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 16 [2021-10-15 19:06:19,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:19,726 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2021-10-15 19:06:19,727 INFO L130 PetriNetUnfolder]: For 2332/2332 co-relation queries the response was YES. [2021-10-15 19:06:19,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 118 events. 9/118 cut-off events. For 2332/2332 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 17 event pairs, 0 based on Foata normal form. 1/111 useless extension candidates. Maximal degree in co-relation 672. Up to 25 conditions per place. [2021-10-15 19:06:19,730 INFO L132 encePairwiseOnDemand]: 13/16 looper letters, 11 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2021-10-15 19:06:19,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 79 transitions, 547 flow [2021-10-15 19:06:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:06:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:06:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2021-10-15 19:06:19,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2021-10-15 19:06:19,732 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 92 transitions. [2021-10-15 19:06:19,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 92 transitions. [2021-10-15 19:06:19,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:19,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 92 transitions. [2021-10-15 19:06:19,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,734 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,734 INFO L186 Difference]: Start difference. First operand has 110 places, 76 transitions, 481 flow. Second operand 9 states and 92 transitions. [2021-10-15 19:06:19,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 79 transitions, 547 flow [2021-10-15 19:06:19,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 79 transitions, 525 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-10-15 19:06:19,750 INFO L242 Difference]: Finished difference. Result has 113 places, 77 transitions, 495 flow [2021-10-15 19:06:19,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=495, PETRI_PLACES=113, PETRI_TRANSITIONS=77} [2021-10-15 19:06:19,751 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 104 predicate places. [2021-10-15 19:06:19,751 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 77 transitions, 495 flow [2021-10-15 19:06:19,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:19,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:19,752 INFO L254 CegarLoopForPetriNet]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:19,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:19,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:06:19,958 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash -771025117, now seen corresponding path program 12 times [2021-10-15 19:06:19,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:19,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042812029] [2021-10-15 19:06:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:19,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-10-15 19:06:20,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:20,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042812029] [2021-10-15 19:06:20,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042812029] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:20,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246110446] [2021-10-15 19:06:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:06:20,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:20,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:20,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:20,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:06:21,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-15 19:06:21,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:06:21,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:06:21,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2021-10-15 19:06:24,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246110446] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:24,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:24,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-10-15 19:06:24,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653436085] [2021-10-15 19:06:24,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:06:24,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:24,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:06:24,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:06:24,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 16 [2021-10-15 19:06:24,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 77 transitions, 495 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:24,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:24,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 16 [2021-10-15 19:06:24,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:24,402 INFO L129 PetriNetUnfolder]: 9/116 cut-off events. [2021-10-15 19:06:24,403 INFO L130 PetriNetUnfolder]: For 2331/2331 co-relation queries the response was YES. [2021-10-15 19:06:24,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 116 events. 9/116 cut-off events. For 2331/2331 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 670. Up to 25 conditions per place. [2021-10-15 19:06:24,403 INFO L132 encePairwiseOnDemand]: 10/16 looper letters, 0 selfloop transitions, 0 changer transitions 75/75 dead transitions. [2021-10-15 19:06:24,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 75 transitions, 525 flow [2021-10-15 19:06:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:06:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:06:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 50 transitions. [2021-10-15 19:06:24,404 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2021-10-15 19:06:24,404 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 50 transitions. [2021-10-15 19:06:24,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 50 transitions. [2021-10-15 19:06:24,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:24,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 50 transitions. [2021-10-15 19:06:24,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:24,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:24,406 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:24,406 INFO L186 Difference]: Start difference. First operand has 113 places, 77 transitions, 495 flow. Second operand 7 states and 50 transitions. [2021-10-15 19:06:24,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 75 transitions, 525 flow [2021-10-15 19:06:24,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 75 transitions, 499 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-10-15 19:06:24,422 INFO L242 Difference]: Finished difference. Result has 110 places, 0 transitions, 0 flow [2021-10-15 19:06:24,422 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=110, PETRI_TRANSITIONS=0} [2021-10-15 19:06:24,423 INFO L334 CegarLoopForPetriNet]: 9 programPoint places, 101 predicate places. [2021-10-15 19:06:24,423 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 0 transitions, 0 flow [2021-10-15 19:06:24,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:24,426 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:24,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:24,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:24,639 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:06:24,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:06:24 BoogieIcfgContainer [2021-10-15 19:06:24,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:06:24,648 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:06:24,648 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:06:24,649 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:06:24,649 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:07" (3/4) ... [2021-10-15 19:06:24,654 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:06:24,665 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:06:24,666 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:06:24,666 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:06:24,666 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:06:24,699 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:06:24,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:06:24,700 INFO L168 Benchmark]: Toolchain (without parser) took 17896.76 ms. Allocated memory was 98.6 MB in the beginning and 163.6 MB in the end (delta: 65.0 MB). Free memory was 57.7 MB in the beginning and 122.1 MB in the end (delta: -64.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:24,701 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 98.6 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:24,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.59 ms. Allocated memory is still 98.6 MB. Free memory was 57.5 MB in the beginning and 74.6 MB in the end (delta: -17.1 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:24,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.90 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:24,702 INFO L168 Benchmark]: Boogie Preprocessor took 35.08 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 72.1 MB in the end (delta: 982.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:24,702 INFO L168 Benchmark]: RCFGBuilder took 294.93 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 62.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:24,703 INFO L168 Benchmark]: TraceAbstraction took 17216.01 ms. Allocated memory was 98.6 MB in the beginning and 163.6 MB in the end (delta: 65.0 MB). Free memory was 62.3 MB in the beginning and 124.2 MB in the end (delta: -61.8 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:24,703 INFO L168 Benchmark]: Witness Printer took 50.95 ms. Allocated memory is still 163.6 MB. Free memory was 124.2 MB in the beginning and 122.1 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:24,709 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 98.6 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 238.59 ms. Allocated memory is still 98.6 MB. Free memory was 57.5 MB in the beginning and 74.6 MB in the end (delta: -17.1 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.90 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.08 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 72.1 MB in the end (delta: 982.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 294.93 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 62.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17216.01 ms. Allocated memory was 98.6 MB in the beginning and 163.6 MB in the end (delta: 65.0 MB). Free memory was 62.3 MB in the beginning and 124.2 MB in the end (delta: -61.8 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Witness Printer took 50.95 ms. Allocated memory is still 163.6 MB. Free memory was 124.2 MB in the beginning and 122.1 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17151.2ms, OverallIterations: 15, TraceHistogramMax: 70, EmptinessCheckTime: 0.0ms, AutomataDifference: 2820.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 56 SDtfs, 31 SDslu, 88 SDs, 0 SdLazy, 1607 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 799.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 752 GetRequests, 561 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 3872.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=776occurred in iteration=11, InterpolantAutomatonStates: 196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 156.6ms SsaConstructionTime, 3702.5ms SatisfiabilityAnalysisTime, 6355.6ms InterpolantComputationTime, 1163 NumberOfCodeBlocks, 972 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 1136 ConstructedInterpolants, 1 QuantifiedInterpolants, 3977 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1274 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 27 InterpolantComputations, 4 PerfectInterpolantSequences, 10298/19941 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:06:24,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add26293-a3a5-459a-9604-c5fdcc9748ee/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...