./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/diamond_2-2.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_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/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_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/diamond_2-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/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_201fc429-98e5-4a4b-8fc7-48814f49b4c6/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 3a7cdc2671d7dcfcceedceb0ed408847d70d2b4e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:42:34,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:42:34,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:42:34,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:42:34,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:42:34,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:42:34,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:42:34,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:42:34,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:42:34,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:42:34,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:42:34,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:42:34,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:42:34,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:42:34,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:42:34,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:42:34,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:42:34,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:42:34,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:42:34,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:42:34,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:42:34,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:42:34,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:42:34,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:42:34,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:42:34,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:42:34,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:42:34,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:42:34,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:42:34,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:42:34,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:42:34,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:42:34,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:42:34,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:42:34,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:42:34,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:42:34,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:42:34,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:42:34,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:42:34,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:42:34,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:42:34,556 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:42:34,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:42:34,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:42:34,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:42:34,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:42:34,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:42:34,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:42:34,606 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:42:34,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:42:34,606 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:42:34,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:42:34,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:42:34,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:42:34,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:42:34,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:42:34,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:42:34,609 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:42:34,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:42:34,609 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:42:34,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:42:34,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:42:34,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:42:34,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:42:34,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:42:34,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:42:34,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:42:34,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:42:34,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:42:34,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:42:34,612 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:42:34,614 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:42:34,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:42:34,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:42:34,615 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_201fc429-98e5-4a4b-8fc7-48814f49b4c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a7cdc2671d7dcfcceedceb0ed408847d70d2b4e [2021-10-15 19:42:34,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:42:35,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:42:35,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:42:35,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:42:35,052 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:42:35,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/loop-acceleration/diamond_2-2.c [2021-10-15 19:42:35,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/data/58e5c9b85/6d464b47b8664752943f9d41c4e950ff/FLAG1a8fe2312 [2021-10-15 19:42:35,746 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:42:35,746 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/sv-benchmarks/c/loop-acceleration/diamond_2-2.c [2021-10-15 19:42:35,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/data/58e5c9b85/6d464b47b8664752943f9d41c4e950ff/FLAG1a8fe2312 [2021-10-15 19:42:36,120 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/data/58e5c9b85/6d464b47b8664752943f9d41c4e950ff [2021-10-15 19:42:36,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:42:36,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:42:36,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:42:36,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:42:36,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:42:36,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2ef204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36, skipping insertion in model container [2021-10-15 19:42:36,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:42:36,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:42:36,362 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_201fc429-98e5-4a4b-8fc7-48814f49b4c6/sv-benchmarks/c/loop-acceleration/diamond_2-2.c[373,386] [2021-10-15 19:42:36,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:42:36,415 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:42:36,432 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_201fc429-98e5-4a4b-8fc7-48814f49b4c6/sv-benchmarks/c/loop-acceleration/diamond_2-2.c[373,386] [2021-10-15 19:42:36,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:42:36,483 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:42:36,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36 WrapperNode [2021-10-15 19:42:36,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:42:36,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:42:36,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:42:36,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:42:36,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:42:36,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:42:36,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:42:36,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:42:36,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:42:36,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:42:36,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:42:36,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:42:36,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (1/1) ... [2021-10-15 19:42:36,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:42:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:36,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:42:36,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:42:36,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:42:36,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:42:36,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:42:36,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:42:37,115 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:42:37,115 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:42:37,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:37 BoogieIcfgContainer [2021-10-15 19:42:37,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:42:37,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:42:37,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:42:37,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:42:37,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:42:36" (1/3) ... [2021-10-15 19:42:37,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f33a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:42:37, skipping insertion in model container [2021-10-15 19:42:37,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:42:36" (2/3) ... [2021-10-15 19:42:37,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f33a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:42:37, skipping insertion in model container [2021-10-15 19:42:37,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:37" (3/3) ... [2021-10-15 19:42:37,146 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-2.c [2021-10-15 19:42:37,152 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:42:37,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:42:37,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:42:37,287 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 19:42:37,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:42:37,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 32 transitions, 64 flow [2021-10-15 19:42:37,320 INFO L129 PetriNetUnfolder]: 13/32 cut-off events. [2021-10-15 19:42:37,320 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:37,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 32 events. 13/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:42:37,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 32 transitions, 64 flow [2021-10-15 19:42:37,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 28 transitions, 56 flow [2021-10-15 19:42:37,330 INFO L129 PetriNetUnfolder]: 5/14 cut-off events. [2021-10-15 19:42:37,331 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:37,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:37,332 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:42:37,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:37,338 INFO L82 PathProgramCache]: Analyzing trace with hash 891600039, now seen corresponding path program 1 times [2021-10-15 19:42:37,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:37,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429222532] [2021-10-15 19:42:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:37,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:37,489 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 19:42:37,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:37,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429222532] [2021-10-15 19:42:37,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429222532] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:37,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:37,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:42:37,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910693014] [2021-10-15 19:42:37,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:42:37,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:37,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:42:37,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:42:37,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 32 [2021-10-15 19:42:37,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 28 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 19:42:37,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:37,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 32 [2021-10-15 19:42:37,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:37,535 INFO L129 PetriNetUnfolder]: 11/27 cut-off events. [2021-10-15 19:42:37,535 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:37,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 27 events. 11/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2021-10-15 19:42:37,538 INFO L132 encePairwiseOnDemand]: 31/32 looper letters, 0 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2021-10-15 19:42:37,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 27 transitions, 54 flow [2021-10-15 19:42:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:42:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:42:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 61 transitions. [2021-10-15 19:42:37,550 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.953125 [2021-10-15 19:42:37,551 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 61 transitions. [2021-10-15 19:42:37,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 61 transitions. [2021-10-15 19:42:37,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:37,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 61 transitions. [2021-10-15 19:42:37,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 19:42:37,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 19:42:37,562 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 19:42:37,564 INFO L186 Difference]: Start difference. First operand has 17 places, 28 transitions, 56 flow. Second operand 2 states and 61 transitions. [2021-10-15 19:42:37,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 27 transitions, 54 flow [2021-10-15 19:42:37,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 27 transitions, 54 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:42:37,569 INFO L242 Difference]: Finished difference. Result has 18 places, 27 transitions, 54 flow [2021-10-15 19:42:37,571 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=18, PETRI_TRANSITIONS=27} [2021-10-15 19:42:37,572 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-10-15 19:42:37,573 INFO L470 AbstractCegarLoop]: Abstraction has has 18 places, 27 transitions, 54 flow [2021-10-15 19:42:37,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 19:42:37,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:37,574 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:42:37,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:42:37,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:37,575 INFO L82 PathProgramCache]: Analyzing trace with hash 889693415, now seen corresponding path program 1 times [2021-10-15 19:42:37,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:37,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485385360] [2021-10-15 19:42:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:37,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:37,666 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 19:42:37,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:37,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485385360] [2021-10-15 19:42:37,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485385360] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:37,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:37,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:37,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145598009] [2021-10-15 19:42:37,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:37,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:37,673 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2021-10-15 19:42:37,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 27 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 19:42:37,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:37,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2021-10-15 19:42:37,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:37,755 INFO L129 PetriNetUnfolder]: 12/30 cut-off events. [2021-10-15 19:42:37,755 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:42:37,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 30 events. 12/30 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. 0/18 useless extension candidates. Maximal degree in co-relation 57. Up to 26 conditions per place. [2021-10-15 19:42:37,757 INFO L132 encePairwiseOnDemand]: 28/32 looper letters, 24 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2021-10-15 19:42:37,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 30 transitions, 114 flow [2021-10-15 19:42:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2021-10-15 19:42:37,762 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2021-10-15 19:42:37,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2021-10-15 19:42:37,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2021-10-15 19:42:37,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:37,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2021-10-15 19:42:37,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:42:37,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 19:42:37,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 19:42:37,766 INFO L186 Difference]: Start difference. First operand has 18 places, 27 transitions, 54 flow. Second operand 3 states and 46 transitions. [2021-10-15 19:42:37,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 30 transitions, 114 flow [2021-10-15 19:42:37,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:42:37,772 INFO L242 Difference]: Finished difference. Result has 21 places, 29 transitions, 73 flow [2021-10-15 19:42:37,773 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=21, PETRI_TRANSITIONS=29} [2021-10-15 19:42:37,781 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 4 predicate places. [2021-10-15 19:42:37,781 INFO L470 AbstractCegarLoop]: Abstraction has has 21 places, 29 transitions, 73 flow [2021-10-15 19:42:37,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 19:42:37,782 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:37,782 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:37,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:42:37,783 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:37,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:37,789 INFO L82 PathProgramCache]: Analyzing trace with hash -857064336, now seen corresponding path program 1 times [2021-10-15 19:42:37,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:37,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570112087] [2021-10-15 19:42:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:37,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:37,919 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 19:42:37,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:37,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570112087] [2021-10-15 19:42:37,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570112087] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:37,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:37,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:37,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635375164] [2021-10-15 19:42:37,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:37,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:37,924 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2021-10-15 19:42:37,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 19:42:37,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:37,925 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2021-10-15 19:42:37,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:38,051 INFO L129 PetriNetUnfolder]: 12/45 cut-off events. [2021-10-15 19:42:38,052 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 19:42:38,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 45 events. 12/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 90. Up to 22 conditions per place. [2021-10-15 19:42:38,054 INFO L132 encePairwiseOnDemand]: 12/32 looper letters, 24 selfloop transitions, 11 changer transitions 0/40 dead transitions. [2021-10-15 19:42:38,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 40 transitions, 167 flow [2021-10-15 19:42:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2021-10-15 19:42:38,057 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6979166666666666 [2021-10-15 19:42:38,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 67 transitions. [2021-10-15 19:42:38,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 67 transitions. [2021-10-15 19:42:38,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:38,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 67 transitions. [2021-10-15 19:42:38,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 19:42:38,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 19:42:38,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 19:42:38,070 INFO L186 Difference]: Start difference. First operand has 21 places, 29 transitions, 73 flow. Second operand 3 states and 67 transitions. [2021-10-15 19:42:38,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 40 transitions, 167 flow [2021-10-15 19:42:38,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:42:38,075 INFO L242 Difference]: Finished difference. Result has 24 places, 39 transitions, 176 flow [2021-10-15 19:42:38,076 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=24, PETRI_TRANSITIONS=39} [2021-10-15 19:42:38,076 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 7 predicate places. [2021-10-15 19:42:38,090 INFO L470 AbstractCegarLoop]: Abstraction has has 24 places, 39 transitions, 176 flow [2021-10-15 19:42:38,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 19:42:38,090 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:38,090 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:38,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:42:38,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:38,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1853162346, now seen corresponding path program 1 times [2021-10-15 19:42:38,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:38,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556213269] [2021-10-15 19:42:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:38,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:38,135 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 19:42:38,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:38,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556213269] [2021-10-15 19:42:38,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556213269] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:38,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:38,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:42:38,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29047468] [2021-10-15 19:42:38,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:42:38,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:42:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:42:38,150 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2021-10-15 19:42:38,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 39 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 19:42:38,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:38,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2021-10-15 19:42:38,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:38,247 INFO L129 PetriNetUnfolder]: 2/35 cut-off events. [2021-10-15 19:42:38,247 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-10-15 19:42:38,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 35 events. 2/35 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 10/45 useless extension candidates. Maximal degree in co-relation 89. Up to 14 conditions per place. [2021-10-15 19:42:38,249 INFO L132 encePairwiseOnDemand]: 21/32 looper letters, 24 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2021-10-15 19:42:38,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 166 flow [2021-10-15 19:42:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:42:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:42:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2021-10-15 19:42:38,254 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2021-10-15 19:42:38,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 58 transitions. [2021-10-15 19:42:38,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 58 transitions. [2021-10-15 19:42:38,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:38,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 58 transitions. [2021-10-15 19:42:38,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 19:42:38,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 19:42:38,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 19:42:38,264 INFO L186 Difference]: Start difference. First operand has 24 places, 39 transitions, 176 flow. Second operand 3 states and 58 transitions. [2021-10-15 19:42:38,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 166 flow [2021-10-15 19:42:38,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:42:38,274 INFO L242 Difference]: Finished difference. Result has 25 places, 29 transitions, 115 flow [2021-10-15 19:42:38,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=25, PETRI_TRANSITIONS=29} [2021-10-15 19:42:38,275 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 8 predicate places. [2021-10-15 19:42:38,275 INFO L470 AbstractCegarLoop]: Abstraction has has 25 places, 29 transitions, 115 flow [2021-10-15 19:42:38,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 19:42:38,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:38,276 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:38,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:42:38,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash -170777494, now seen corresponding path program 1 times [2021-10-15 19:42:38,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:38,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816563194] [2021-10-15 19:42:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:38,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:38,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:38,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816563194] [2021-10-15 19:42:38,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816563194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:38,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936131617] [2021-10-15 19:42:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:38,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:38,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:38,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:38,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:42:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-15 19:42:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:39,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936131617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:39,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:42:39,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 11 [2021-10-15 19:42:39,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973015261] [2021-10-15 19:42:39,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:42:39,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:42:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:42:39,399 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 32 [2021-10-15 19:42:39,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 29 transitions, 115 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 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 19:42:39,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:39,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 32 [2021-10-15 19:42:39,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:39,579 INFO L129 PetriNetUnfolder]: 1/31 cut-off events. [2021-10-15 19:42:39,579 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 19:42:39,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 31 events. 1/31 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 2/33 useless extension candidates. Maximal degree in co-relation 88. Up to 16 conditions per place. [2021-10-15 19:42:39,583 INFO L132 encePairwiseOnDemand]: 17/32 looper letters, 15 selfloop transitions, 2 changer transitions 12/31 dead transitions. [2021-10-15 19:42:39,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 175 flow [2021-10-15 19:42:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:42:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:42:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 67 transitions. [2021-10-15 19:42:39,590 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2326388888888889 [2021-10-15 19:42:39,591 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 67 transitions. [2021-10-15 19:42:39,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 67 transitions. [2021-10-15 19:42:39,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:39,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 67 transitions. [2021-10-15 19:42:39,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 19:42:39,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 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 19:42:39,596 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 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 19:42:39,597 INFO L186 Difference]: Start difference. First operand has 25 places, 29 transitions, 115 flow. Second operand 9 states and 67 transitions. [2021-10-15 19:42:39,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 175 flow [2021-10-15 19:42:39,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:42:39,604 INFO L242 Difference]: Finished difference. Result has 34 places, 18 transitions, 77 flow [2021-10-15 19:42:39,604 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=77, PETRI_PLACES=34, PETRI_TRANSITIONS=18} [2021-10-15 19:42:39,605 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 17 predicate places. [2021-10-15 19:42:39,605 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 18 transitions, 77 flow [2021-10-15 19:42:39,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 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 19:42:39,605 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:39,606 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:39,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:42:39,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:39,834 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash -843881686, now seen corresponding path program 1 times [2021-10-15 19:42:39,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:39,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862877388] [2021-10-15 19:42:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:39,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:40,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:40,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862877388] [2021-10-15 19:42:40,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862877388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:40,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320700600] [2021-10-15 19:42:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:40,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:40,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:40,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:42:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:40,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:42:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:40,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320700600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:40,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:42:40,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-15 19:42:40,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640080835] [2021-10-15 19:42:40,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:42:40,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:42:40,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:42:40,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2021-10-15 19:42:40,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 18 transitions, 77 flow. Second operand has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 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 19:42:40,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:40,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2021-10-15 19:42:40,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:40,673 INFO L129 PetriNetUnfolder]: 1/30 cut-off events. [2021-10-15 19:42:40,674 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 19:42:40,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 30 events. 1/30 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 91. Up to 21 conditions per place. [2021-10-15 19:42:40,675 INFO L132 encePairwiseOnDemand]: 20/32 looper letters, 15 selfloop transitions, 12 changer transitions 0/30 dead transitions. [2021-10-15 19:42:40,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 30 transitions, 181 flow [2021-10-15 19:42:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:42:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:42:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 106 transitions. [2021-10-15 19:42:40,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2548076923076923 [2021-10-15 19:42:40,679 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 106 transitions. [2021-10-15 19:42:40,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 106 transitions. [2021-10-15 19:42:40,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:40,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 106 transitions. [2021-10-15 19:42:40,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 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 19:42:40,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 32.0) internal successors, (448), 14 states have internal predecessors, (448), 0 states have call successors, (0), 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 19:42:40,687 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 32.0) internal successors, (448), 14 states have internal predecessors, (448), 0 states have call successors, (0), 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 19:42:40,687 INFO L186 Difference]: Start difference. First operand has 34 places, 18 transitions, 77 flow. Second operand 13 states and 106 transitions. [2021-10-15 19:42:40,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 30 transitions, 181 flow [2021-10-15 19:42:40,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 130 flow, removed 23 selfloop flow, removed 5 redundant places. [2021-10-15 19:42:40,694 INFO L242 Difference]: Finished difference. Result has 44 places, 28 transitions, 138 flow [2021-10-15 19:42:40,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2021-10-15 19:42:40,695 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 27 predicate places. [2021-10-15 19:42:40,702 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 138 flow [2021-10-15 19:42:40,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 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 19:42:40,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:40,703 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:40,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:42:40,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:40,918 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2006766329, now seen corresponding path program 2 times [2021-10-15 19:42:40,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:40,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252559808] [2021-10-15 19:42:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:40,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:41,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:41,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252559808] [2021-10-15 19:42:41,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252559808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:41,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435927885] [2021-10-15 19:42:41,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:42:41,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:41,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:41,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:42:41,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:42:41,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:42:41,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-15 19:42:41,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:41,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435927885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:41,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:42:41,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-15 19:42:41,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678468767] [2021-10-15 19:42:41,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-15 19:42:41,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-15 19:42:41,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-10-15 19:42:41,907 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2021-10-15 19:42:41,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 138 flow. Second operand has 24 states, 24 states have (on average 7.125) internal successors, (171), 24 states have internal predecessors, (171), 0 states have call successors, (0), 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 19:42:41,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:41,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2021-10-15 19:42:41,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:42,333 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2021-10-15 19:42:42,333 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-10-15 19:42:42,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 41 events. 1/41 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 133. Up to 15 conditions per place. [2021-10-15 19:42:42,334 INFO L132 encePairwiseOnDemand]: 20/32 looper letters, 16 selfloop transitions, 22 changer transitions 0/41 dead transitions. [2021-10-15 19:42:42,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 41 transitions, 264 flow [2021-10-15 19:42:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 19:42:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-15 19:42:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 177 transitions. [2021-10-15 19:42:42,337 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.24048913043478262 [2021-10-15 19:42:42,337 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 177 transitions. [2021-10-15 19:42:42,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 177 transitions. [2021-10-15 19:42:42,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:42,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 177 transitions. [2021-10-15 19:42:42,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.695652173913044) internal successors, (177), 23 states have internal predecessors, (177), 0 states have call successors, (0), 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 19:42:42,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 32.0) internal successors, (768), 24 states have internal predecessors, (768), 0 states have call successors, (0), 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 19:42:42,342 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 32.0) internal successors, (768), 24 states have internal predecessors, (768), 0 states have call successors, (0), 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 19:42:42,342 INFO L186 Difference]: Start difference. First operand has 44 places, 28 transitions, 138 flow. Second operand 23 states and 177 transitions. [2021-10-15 19:42:42,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 41 transitions, 264 flow [2021-10-15 19:42:42,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 41 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 19:42:42,346 INFO L242 Difference]: Finished difference. Result has 74 places, 38 transitions, 260 flow [2021-10-15 19:42:42,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=260, PETRI_PLACES=74, PETRI_TRANSITIONS=38} [2021-10-15 19:42:42,346 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 57 predicate places. [2021-10-15 19:42:42,346 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 38 transitions, 260 flow [2021-10-15 19:42:42,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.125) internal successors, (171), 24 states have internal predecessors, (171), 0 states have call successors, (0), 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 19:42:42,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:42,347 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:42,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-15 19:42:42,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:42,574 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:42,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1182300406, now seen corresponding path program 3 times [2021-10-15 19:42:42,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:42,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058410448] [2021-10-15 19:42:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:42,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:43,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:43,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058410448] [2021-10-15 19:42:43,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058410448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:43,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705361211] [2021-10-15 19:42:43,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:42:43,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:43,541 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:43,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:42:43,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:42:43,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:42:43,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-15 19:42:43,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:44,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705361211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:44,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:42:44,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-10-15 19:42:44,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130440503] [2021-10-15 19:42:44,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-15 19:42:44,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-15 19:42:44,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-10-15 19:42:44,127 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2021-10-15 19:42:44,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 38 transitions, 260 flow. Second operand has 34 states, 34 states have (on average 7.117647058823529) internal successors, (242), 34 states have internal predecessors, (242), 0 states have call successors, (0), 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 19:42:44,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:44,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2021-10-15 19:42:44,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:44,890 INFO L129 PetriNetUnfolder]: 1/52 cut-off events. [2021-10-15 19:42:44,890 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2021-10-15 19:42:44,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 52 events. 1/52 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/53 useless extension candidates. Maximal degree in co-relation 216. Up to 15 conditions per place. [2021-10-15 19:42:44,893 INFO L132 encePairwiseOnDemand]: 20/32 looper letters, 17 selfloop transitions, 32 changer transitions 0/52 dead transitions. [2021-10-15 19:42:44,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 52 transitions, 430 flow [2021-10-15 19:42:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-15 19:42:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-15 19:42:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 248 transitions. [2021-10-15 19:42:44,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.23484848484848486 [2021-10-15 19:42:44,899 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 248 transitions. [2021-10-15 19:42:44,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 248 transitions. [2021-10-15 19:42:44,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:44,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 248 transitions. [2021-10-15 19:42:44,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 7.515151515151516) internal successors, (248), 33 states have internal predecessors, (248), 0 states have call successors, (0), 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 19:42:44,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 32.0) internal successors, (1088), 34 states have internal predecessors, (1088), 0 states have call successors, (0), 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 19:42:44,907 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 32.0) internal successors, (1088), 34 states have internal predecessors, (1088), 0 states have call successors, (0), 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 19:42:44,908 INFO L186 Difference]: Start difference. First operand has 74 places, 38 transitions, 260 flow. Second operand 33 states and 248 transitions. [2021-10-15 19:42:44,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 52 transitions, 430 flow [2021-10-15 19:42:44,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 52 transitions, 382 flow, removed 12 selfloop flow, removed 12 redundant places. [2021-10-15 19:42:44,924 INFO L242 Difference]: Finished difference. Result has 104 places, 48 transitions, 382 flow [2021-10-15 19:42:44,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=382, PETRI_PLACES=104, PETRI_TRANSITIONS=48} [2021-10-15 19:42:44,925 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 87 predicate places. [2021-10-15 19:42:44,925 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 48 transitions, 382 flow [2021-10-15 19:42:44,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.117647058823529) internal successors, (242), 34 states have internal predecessors, (242), 0 states have call successors, (0), 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 19:42:44,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:44,926 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:44,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:42:45,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:45,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:45,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1256465113, now seen corresponding path program 4 times [2021-10-15 19:42:45,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:45,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292178448] [2021-10-15 19:42:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:45,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:46,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:46,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292178448] [2021-10-15 19:42:46,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292178448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:46,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757280186] [2021-10-15 19:42:46,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:42:46,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:46,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:46,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:46,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:42:46,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:42:46,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:42:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-15 19:42:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:49,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757280186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:49,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:42:49,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 84 [2021-10-15 19:42:49,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26643086] [2021-10-15 19:42:49,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-10-15 19:42:49,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-10-15 19:42:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=6688, Unknown=0, NotChecked=0, Total=6972 [2021-10-15 19:42:49,924 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 32 [2021-10-15 19:42:49,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 48 transitions, 382 flow. Second operand has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 0 states have call successors, (0), 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 19:42:49,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:49,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 32 [2021-10-15 19:42:49,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:51,563 INFO L129 PetriNetUnfolder]: 1/63 cut-off events. [2021-10-15 19:42:51,564 INFO L130 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2021-10-15 19:42:51,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 63 events. 1/63 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 300. Up to 16 conditions per place. [2021-10-15 19:42:51,565 INFO L132 encePairwiseOnDemand]: 20/32 looper letters, 19 selfloop transitions, 42 changer transitions 0/63 dead transitions. [2021-10-15 19:42:51,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 63 transitions, 598 flow [2021-10-15 19:42:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-15 19:42:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-15 19:42:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 234 transitions. [2021-10-15 19:42:51,570 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17005813953488372 [2021-10-15 19:42:51,570 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 234 transitions. [2021-10-15 19:42:51,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 234 transitions. [2021-10-15 19:42:51,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:51,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 234 transitions. [2021-10-15 19:42:51,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 5.441860465116279) internal successors, (234), 43 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:42:51,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 32.0) internal successors, (1408), 44 states have internal predecessors, (1408), 0 states have call successors, (0), 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 19:42:51,578 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 32.0) internal successors, (1408), 44 states have internal predecessors, (1408), 0 states have call successors, (0), 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 19:42:51,578 INFO L186 Difference]: Start difference. First operand has 104 places, 48 transitions, 382 flow. Second operand 43 states and 234 transitions. [2021-10-15 19:42:51,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 63 transitions, 598 flow [2021-10-15 19:42:51,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 63 transitions, 510 flow, removed 22 selfloop flow, removed 22 redundant places. [2021-10-15 19:42:51,587 INFO L242 Difference]: Finished difference. Result has 134 places, 58 transitions, 504 flow [2021-10-15 19:42:51,588 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=504, PETRI_PLACES=134, PETRI_TRANSITIONS=58} [2021-10-15 19:42:51,588 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 117 predicate places. [2021-10-15 19:42:51,589 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 58 transitions, 504 flow [2021-10-15 19:42:51,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 0 states have call successors, (0), 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 19:42:51,589 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:42:51,590 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-15 19:42:51,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:42:51,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:51,810 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:42:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:42:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash 28672746, now seen corresponding path program 5 times [2021-10-15 19:42:51,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:42:51,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626074834] [2021-10-15 19:42:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:42:51,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:42:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:42:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-10-15 19:42:52,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:42:52,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626074834] [2021-10-15 19:42:52,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626074834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:52,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124162754] [2021-10-15 19:42:52,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:42:52,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:42:52,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:42:52,734 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:42:52,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:42:53,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-15 19:42:53,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:42:53,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-15 19:42:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:42:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:42:55,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124162754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:42:55,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:42:55,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 54] total 57 [2021-10-15 19:42:55,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858088210] [2021-10-15 19:42:55,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-15 19:42:55,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:42:55,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-15 19:42:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3003, Unknown=0, NotChecked=0, Total=3192 [2021-10-15 19:42:55,677 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 32 [2021-10-15 19:42:55,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 58 transitions, 504 flow. Second operand has 57 states, 57 states have (on average 5.315789473684211) internal successors, (303), 57 states have internal predecessors, (303), 0 states have call successors, (0), 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 19:42:55,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:55,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 32 [2021-10-15 19:42:55,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:57,794 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-10-15 19:42:57,794 INFO L130 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2021-10-15 19:42:57,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 59 events. 0/59 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-10-15 19:42:57,795 INFO L132 encePairwiseOnDemand]: 18/32 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2021-10-15 19:42:57,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 59 transitions, 610 flow [2021-10-15 19:42:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-15 19:42:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-15 19:42:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 276 transitions. [2021-10-15 19:42:57,799 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.1597222222222222 [2021-10-15 19:42:57,799 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 276 transitions. [2021-10-15 19:42:57,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 276 transitions. [2021-10-15 19:42:57,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:57,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 276 transitions. [2021-10-15 19:42:57,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 5.111111111111111) internal successors, (276), 54 states have internal predecessors, (276), 0 states have call successors, (0), 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 19:42:57,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 32.0) internal successors, (1760), 55 states have internal predecessors, (1760), 0 states have call successors, (0), 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 19:42:57,808 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 32.0) internal successors, (1760), 55 states have internal predecessors, (1760), 0 states have call successors, (0), 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 19:42:57,808 INFO L186 Difference]: Start difference. First operand has 134 places, 58 transitions, 504 flow. Second operand 54 states and 276 transitions. [2021-10-15 19:42:57,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 59 transitions, 610 flow [2021-10-15 19:42:57,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 59 transitions, 481 flow, removed 32 selfloop flow, removed 33 redundant places. [2021-10-15 19:42:57,817 INFO L242 Difference]: Finished difference. Result has 152 places, 0 transitions, 0 flow [2021-10-15 19:42:57,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=0, PETRI_PLACES=152, PETRI_TRANSITIONS=0} [2021-10-15 19:42:57,818 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 135 predicate places. [2021-10-15 19:42:57,818 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 0 transitions, 0 flow [2021-10-15 19:42:57,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.315789473684211) internal successors, (303), 57 states have internal predecessors, (303), 0 states have call successors, (0), 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 19:42:57,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:42:57,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:42:58,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:42:58,033 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:42:58,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:42:58 BoogieIcfgContainer [2021-10-15 19:42:58,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:42:58,038 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:42:58,038 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:42:58,039 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:42:58,039 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:42:37" (3/4) ... [2021-10-15 19:42:58,043 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:42:58,056 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:42:58,056 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:42:58,057 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:42:58,057 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:42:58,110 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:42:58,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:42:58,112 INFO L168 Benchmark]: Toolchain (without parser) took 21986.41 ms. Allocated memory was 104.9 MB in the beginning and 172.0 MB in the end (delta: 67.1 MB). Free memory was 64.0 MB in the beginning and 85.2 MB in the end (delta: -21.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:58,113 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 80.4 MB in the end (delta: 67.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:42:58,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.70 ms. Allocated memory is still 104.9 MB. Free memory was 63.8 MB in the beginning and 80.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:58,114 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.50 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:58,114 INFO L168 Benchmark]: Boogie Preprocessor took 44.47 ms. Allocated memory is still 104.9 MB. Free memory was 78.3 MB in the beginning and 77.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:58,115 INFO L168 Benchmark]: RCFGBuilder took 509.62 ms. Allocated memory is still 104.9 MB. Free memory was 77.1 MB in the beginning and 66.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:58,116 INFO L168 Benchmark]: TraceAbstraction took 20918.16 ms. Allocated memory was 104.9 MB in the beginning and 172.0 MB in the end (delta: 67.1 MB). Free memory was 65.4 MB in the beginning and 88.1 MB in the end (delta: -22.7 MB). Peak memory consumption was 48.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:58,116 INFO L168 Benchmark]: Witness Printer took 72.38 ms. Allocated memory is still 172.0 MB. Free memory was 88.1 MB in the beginning and 85.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:58,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 80.4 MB in the end (delta: 67.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 357.70 ms. Allocated memory is still 104.9 MB. Free memory was 63.8 MB in the beginning and 80.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.50 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.47 ms. Allocated memory is still 104.9 MB. Free memory was 78.3 MB in the beginning and 77.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 509.62 ms. Allocated memory is still 104.9 MB. Free memory was 77.1 MB in the beginning and 66.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20918.16 ms. Allocated memory was 104.9 MB in the beginning and 172.0 MB in the end (delta: 67.1 MB). Free memory was 65.4 MB in the beginning and 88.1 MB in the end (delta: -22.7 MB). Peak memory consumption was 48.1 MB. Max. memory is 16.1 GB. * Witness Printer took 72.38 ms. Allocated memory is still 172.0 MB. Free memory was 88.1 MB in the beginning and 85.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. 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: 8]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 20774.0ms, OverallIterations: 10, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 5946.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 74 SDtfs, 42 SDslu, 69 SDs, 0 SdLazy, 7843 SolverSat, 174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3684.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 416 GetRequests, 130 SyntacticMatches, 57 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 7965.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=504occurred in iteration=9, InterpolantAutomatonStates: 186, 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: 99.9ms SsaConstructionTime, 891.0ms SatisfiabilityAnalysisTime, 11601.0ms InterpolantComputationTime, 470 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 4000 SizeOfPredicates, 12 NumberOfNonLiveVariables, 870 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 104/474 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 19:42:58,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201fc429-98e5-4a4b-8fc7-48814f49b4c6/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...