./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i --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_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/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_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/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_461df4ed-d72a-46d8-bb3a-f399986713fa/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 bb07a385d9ee58b3b4f70410fbd2936e86f27502 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:28:10,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:28:10,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:28:10,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:28:10,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:28:10,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:28:10,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:28:10,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:28:10,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:28:10,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:28:10,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:28:10,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:28:10,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:28:10,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:28:10,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:28:10,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:28:10,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:28:10,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:28:10,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:28:10,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:28:10,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:28:10,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:28:10,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:28:10,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:28:10,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:28:10,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:28:10,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:28:10,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:28:10,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:28:10,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:28:10,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:28:10,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:28:10,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:28:10,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:28:10,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:28:10,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:28:10,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:28:10,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:28:10,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:28:10,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:28:10,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:28:10,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:28:10,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:28:10,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:28:10,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:28:10,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:28:10,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:28:10,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:28:10,443 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:28:10,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:28:10,443 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:28:10,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:28:10,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:28:10,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:28:10,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:28:10,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:28:10,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:28:10,446 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:28:10,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:28:10,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:28:10,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:28:10,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:28:10,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:28:10,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:28:10,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:28:10,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:28:10,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:28:10,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:28:10,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:28:10,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:28:10,451 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:28:10,451 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:28:10,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:28:10,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:28:10,452 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_461df4ed-d72a-46d8-bb3a-f399986713fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07a385d9ee58b3b4f70410fbd2936e86f27502 [2021-10-15 19:28:10,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:28:10,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:28:10,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:28:10,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:28:10,889 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:28:10,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-10-15 19:28:10,981 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/data/23d4430d1/24d4685acf8b4c5dbabaa619f5300fd8/FLAGacb6fc4d7 [2021-10-15 19:28:11,738 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:28:11,739 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-10-15 19:28:11,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/data/23d4430d1/24d4685acf8b4c5dbabaa619f5300fd8/FLAGacb6fc4d7 [2021-10-15 19:28:11,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/data/23d4430d1/24d4685acf8b4c5dbabaa619f5300fd8 [2021-10-15 19:28:11,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:28:11,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:28:12,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:28:12,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:28:12,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:28:12,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:28:11" (1/1) ... [2021-10-15 19:28:12,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@793c3b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12, skipping insertion in model container [2021-10-15 19:28:12,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:28:11" (1/1) ... [2021-10-15 19:28:12,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:28:12,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:28:12,595 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_461df4ed-d72a-46d8-bb3a-f399986713fa/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-10-15 19:28:12,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:28:12,617 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:28:12,680 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_461df4ed-d72a-46d8-bb3a-f399986713fa/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-10-15 19:28:12,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:28:12,735 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:28:12,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12 WrapperNode [2021-10-15 19:28:12,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:28:12,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:28:12,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:28:12,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:28:12,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:28:12,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:28:12,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:28:12,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:28:12,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:28:12,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:28:12,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:28:12,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:28:12,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (1/1) ... [2021-10-15 19:28:12,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:28:12,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:28:13,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:28:13,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:28:13,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:28:13,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:28:13,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:28:13,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:28:13,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:28:13,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:28:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:28:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 19:28:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:28:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:28:13,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:28:13,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:28:13,581 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-15 19:28:13,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:28:13 BoogieIcfgContainer [2021-10-15 19:28:13,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:28:13,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:28:13,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:28:13,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:28:13,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:28:11" (1/3) ... [2021-10-15 19:28:13,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794f56ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:28:13, skipping insertion in model container [2021-10-15 19:28:13,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:28:12" (2/3) ... [2021-10-15 19:28:13,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794f56ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:28:13, skipping insertion in model container [2021-10-15 19:28:13,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:28:13" (3/3) ... [2021-10-15 19:28:13,599 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2021-10-15 19:28:13,608 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:28:13,608 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:28:13,684 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:28:13,694 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 19:28:13,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:28:13,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 36 transitions, 72 flow [2021-10-15 19:28:13,742 INFO L129 PetriNetUnfolder]: 11/36 cut-off events. [2021-10-15 19:28:13,742 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:28:13,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 36 events. 11/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:28:13,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 36 transitions, 72 flow [2021-10-15 19:28:13,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 24 transitions, 48 flow [2021-10-15 19:28:13,757 INFO L129 PetriNetUnfolder]: 5/21 cut-off events. [2021-10-15 19:28:13,757 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:28:13,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:13,758 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:13,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:13,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1758326402, now seen corresponding path program 1 times [2021-10-15 19:28:13,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:13,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888611790] [2021-10-15 19:28:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:13,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:14,055 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 19:28:14,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:14,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888611790] [2021-10-15 19:28:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888611790] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:14,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:14,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:28:14,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537818141] [2021-10-15 19:28:14,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:28:14,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:14,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:28:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:28:14,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 36 [2021-10-15 19:28:14,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 24 transitions, 48 flow. Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:28:14,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:14,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 36 [2021-10-15 19:28:14,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:14,144 INFO L129 PetriNetUnfolder]: 4/22 cut-off events. [2021-10-15 19:28:14,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:28:14,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 22 events. 4/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 2/20 useless extension candidates. Maximal degree in co-relation 22. Up to 3 conditions per place. [2021-10-15 19:28:14,148 INFO L132 encePairwiseOnDemand]: 34/36 looper letters, 0 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2021-10-15 19:28:14,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 22 transitions, 44 flow [2021-10-15 19:28:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:28:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:28:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 66 transitions. [2021-10-15 19:28:14,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-10-15 19:28:14,167 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 66 transitions. [2021-10-15 19:28:14,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 66 transitions. [2021-10-15 19:28:14,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:14,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 66 transitions. [2021-10-15 19:28:14,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 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 19:28:14,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 19:28:14,182 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 19:28:14,184 INFO L186 Difference]: Start difference. First operand has 19 places, 24 transitions, 48 flow. Second operand 2 states and 66 transitions. [2021-10-15 19:28:14,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 22 transitions, 44 flow [2021-10-15 19:28:14,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 44 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:28:14,191 INFO L242 Difference]: Finished difference. Result has 20 places, 22 transitions, 44 flow [2021-10-15 19:28:14,194 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=20, PETRI_TRANSITIONS=22} [2021-10-15 19:28:14,195 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2021-10-15 19:28:14,196 INFO L470 AbstractCegarLoop]: Abstraction has has 20 places, 22 transitions, 44 flow [2021-10-15 19:28:14,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:28:14,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:14,197 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:14,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:28:14,198 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:14,199 INFO L82 PathProgramCache]: Analyzing trace with hash 612826738, now seen corresponding path program 1 times [2021-10-15 19:28:14,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:14,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873372689] [2021-10-15 19:28:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:14,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:14,343 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 19:28:14,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:14,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873372689] [2021-10-15 19:28:14,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873372689] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:14,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:14,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:28:14,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834804058] [2021-10-15 19:28:14,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:28:14,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:28:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:28:14,356 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 36 [2021-10-15 19:28:14,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 22 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 19:28:14,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:14,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 36 [2021-10-15 19:28:14,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:14,391 INFO L129 PetriNetUnfolder]: 4/27 cut-off events. [2021-10-15 19:28:14,392 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:28:14,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 33. Up to 5 conditions per place. [2021-10-15 19:28:14,393 INFO L132 encePairwiseOnDemand]: 33/36 looper letters, 4 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2021-10-15 19:28:14,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 60 flow [2021-10-15 19:28:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:28:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:28:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2021-10-15 19:28:14,397 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-10-15 19:28:14,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2021-10-15 19:28:14,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2021-10-15 19:28:14,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:14,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2021-10-15 19:28:14,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 19:28:14,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:28:14,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:28:14,404 INFO L186 Difference]: Start difference. First operand has 20 places, 22 transitions, 44 flow. Second operand 3 states and 91 transitions. [2021-10-15 19:28:14,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 60 flow [2021-10-15 19:28:14,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 24 transitions, 60 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:28:14,408 INFO L242 Difference]: Finished difference. Result has 23 places, 23 transitions, 56 flow [2021-10-15 19:28:14,409 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=23} [2021-10-15 19:28:14,410 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2021-10-15 19:28:14,410 INFO L470 AbstractCegarLoop]: Abstraction has has 23 places, 23 transitions, 56 flow [2021-10-15 19:28:14,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 19:28:14,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:14,411 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:14,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:28:14,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 505987594, now seen corresponding path program 1 times [2021-10-15 19:28:14,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:14,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141541624] [2021-10-15 19:28:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:14,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:14,568 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 19:28:14,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:14,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141541624] [2021-10-15 19:28:14,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141541624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:14,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634761482] [2021-10-15 19:28:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:14,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:28:14,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:28:14,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:28:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:28:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:14,949 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 19:28:14,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634761482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:14,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:28:14,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 19:28:14,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974969611] [2021-10-15 19:28:14,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:28:14,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:28:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:28:14,956 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 36 [2021-10-15 19:28:14,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 23 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 19:28:14,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:14,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 36 [2021-10-15 19:28:14,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:15,013 INFO L129 PetriNetUnfolder]: 4/28 cut-off events. [2021-10-15 19:28:15,014 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 19:28:15,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 28 events. 4/28 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 40. Up to 4 conditions per place. [2021-10-15 19:28:15,015 INFO L132 encePairwiseOnDemand]: 32/36 looper letters, 3 selfloop transitions, 4 changer transitions 0/25 dead transitions. [2021-10-15 19:28:15,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 74 flow [2021-10-15 19:28:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:28:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:28:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2021-10-15 19:28:15,018 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-10-15 19:28:15,018 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2021-10-15 19:28:15,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2021-10-15 19:28:15,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:15,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2021-10-15 19:28:15,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 19:28:15,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 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 19:28:15,023 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 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 19:28:15,024 INFO L186 Difference]: Start difference. First operand has 23 places, 23 transitions, 56 flow. Second operand 4 states and 120 transitions. [2021-10-15 19:28:15,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 74 flow [2021-10-15 19:28:15,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:28:15,027 INFO L242 Difference]: Finished difference. Result has 27 places, 24 transitions, 74 flow [2021-10-15 19:28:15,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2021-10-15 19:28:15,028 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2021-10-15 19:28:15,028 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 74 flow [2021-10-15 19:28:15,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 19:28:15,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:15,029 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:15,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:15,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:15,244 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:15,245 INFO L82 PathProgramCache]: Analyzing trace with hash -980845198, now seen corresponding path program 2 times [2021-10-15 19:28:15,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:15,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987944256] [2021-10-15 19:28:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:15,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 19:28:15,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:15,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987944256] [2021-10-15 19:28:15,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987944256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:15,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:15,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:28:15,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846345994] [2021-10-15 19:28:15,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:28:15,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:28:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:28:15,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2021-10-15 19:28:15,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 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 19:28:15,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:15,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2021-10-15 19:28:15,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:15,958 INFO L129 PetriNetUnfolder]: 3/27 cut-off events. [2021-10-15 19:28:15,959 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 19:28:15,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 27 events. 3/27 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 59. Up to 10 conditions per place. [2021-10-15 19:28:15,962 INFO L132 encePairwiseOnDemand]: 29/36 looper letters, 8 selfloop transitions, 6 changer transitions 0/23 dead transitions. [2021-10-15 19:28:15,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 100 flow [2021-10-15 19:28:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:28:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:28:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2021-10-15 19:28:15,972 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2021-10-15 19:28:15,972 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 105 transitions. [2021-10-15 19:28:15,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 105 transitions. [2021-10-15 19:28:15,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:15,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 105 transitions. [2021-10-15 19:28:15,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:28:15,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 36.0) internal successors, (288), 8 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:28:15,980 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 36.0) internal successors, (288), 8 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:28:15,980 INFO L186 Difference]: Start difference. First operand has 27 places, 24 transitions, 74 flow. Second operand 7 states and 105 transitions. [2021-10-15 19:28:15,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 100 flow [2021-10-15 19:28:15,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 96 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:28:15,992 INFO L242 Difference]: Finished difference. Result has 32 places, 23 transitions, 80 flow [2021-10-15 19:28:15,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2021-10-15 19:28:15,992 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 13 predicate places. [2021-10-15 19:28:15,992 INFO L470 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 80 flow [2021-10-15 19:28:15,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 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 19:28:15,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:15,993 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:15,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:28:15,994 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1994364605, now seen corresponding path program 1 times [2021-10-15 19:28:15,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:15,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917092411] [2021-10-15 19:28:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:15,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:28:16,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:16,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917092411] [2021-10-15 19:28:16,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917092411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:16,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:16,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-15 19:28:16,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815151911] [2021-10-15 19:28:16,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:28:16,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:28:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:28:16,484 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2021-10-15 19:28:16,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 80 flow. Second operand has 12 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 0 states have call successors, (0), 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 19:28:16,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:16,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2021-10-15 19:28:16,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:17,185 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2021-10-15 19:28:17,186 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 19:28:17,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 31 events. 3/31 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 72. Up to 5 conditions per place. [2021-10-15 19:28:17,191 INFO L132 encePairwiseOnDemand]: 24/36 looper letters, 9 selfloop transitions, 14 changer transitions 0/29 dead transitions. [2021-10-15 19:28:17,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 29 transitions, 140 flow [2021-10-15 19:28:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:28:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:28:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 166 transitions. [2021-10-15 19:28:17,199 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3547008547008547 [2021-10-15 19:28:17,199 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 166 transitions. [2021-10-15 19:28:17,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 166 transitions. [2021-10-15 19:28:17,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:17,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 166 transitions. [2021-10-15 19:28:17,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.76923076923077) internal successors, (166), 13 states have internal predecessors, (166), 0 states have call successors, (0), 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 19:28:17,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 36.0) internal successors, (504), 14 states have internal predecessors, (504), 0 states have call successors, (0), 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 19:28:17,212 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 36.0) internal successors, (504), 14 states have internal predecessors, (504), 0 states have call successors, (0), 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 19:28:17,213 INFO L186 Difference]: Start difference. First operand has 32 places, 23 transitions, 80 flow. Second operand 13 states and 166 transitions. [2021-10-15 19:28:17,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 29 transitions, 140 flow [2021-10-15 19:28:17,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-15 19:28:17,217 INFO L242 Difference]: Finished difference. Result has 40 places, 27 transitions, 116 flow [2021-10-15 19:28:17,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2021-10-15 19:28:17,218 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 21 predicate places. [2021-10-15 19:28:17,218 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 116 flow [2021-10-15 19:28:17,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 0 states have call successors, (0), 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 19:28:17,219 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:17,219 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:17,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:28:17,220 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1994362931, now seen corresponding path program 1 times [2021-10-15 19:28:17,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:17,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996359992] [2021-10-15 19:28:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:17,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:28:17,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:17,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996359992] [2021-10-15 19:28:17,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996359992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:17,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700824927] [2021-10-15 19:28:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:17,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:17,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:28:17,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:28:17,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:28:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-15 19:28:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:18,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:28:18,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:28:18,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-15 19:28:19,117 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 19:28:19,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-15 19:28:19,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:19,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:19,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-10-15 19:28:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:19,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-10-15 19:28:19,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2021-10-15 19:28:19,428 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-15 19:28:19,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-10-15 19:28:19,681 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-10-15 19:28:19,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 143 [2021-10-15 19:28:19,732 INFO L354 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2021-10-15 19:28:19,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 122 [2021-10-15 19:28:19,792 INFO L354 Elim1Store]: treesize reduction 222, result has 14.9 percent of original size [2021-10-15 19:28:19,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 139 [2021-10-15 19:28:20,309 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-10-15 19:28:20,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 84 [2021-10-15 19:28:20,332 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-10-15 19:28:20,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 51 [2021-10-15 19:28:20,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:28:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:28:20,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700824927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:20,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:28:20,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-10-15 19:28:20,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021300258] [2021-10-15 19:28:20,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-15 19:28:20,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:20,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-15 19:28:20,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-10-15 19:28:20,486 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2021-10-15 19:28:20,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 27 transitions, 116 flow. Second operand has 24 states, 24 states have (on average 11.541666666666666) internal successors, (277), 24 states have internal predecessors, (277), 0 states have call successors, (0), 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 19:28:20,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:20,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2021-10-15 19:28:20,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:22,182 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-10-15 19:28:22,185 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 19:28:22,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 29 events. 3/29 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2021-10-15 19:28:22,187 INFO L132 encePairwiseOnDemand]: 23/36 looper letters, 9 selfloop transitions, 15 changer transitions 0/29 dead transitions. [2021-10-15 19:28:22,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 29 transitions, 168 flow [2021-10-15 19:28:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:28:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:28:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 164 transitions. [2021-10-15 19:28:22,190 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2021-10-15 19:28:22,191 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 164 transitions. [2021-10-15 19:28:22,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 164 transitions. [2021-10-15 19:28:22,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:22,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 164 transitions. [2021-10-15 19:28:22,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 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 19:28:22,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 36.0) internal successors, (540), 15 states have internal predecessors, (540), 0 states have call successors, (0), 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 19:28:22,196 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 36.0) internal successors, (540), 15 states have internal predecessors, (540), 0 states have call successors, (0), 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 19:28:22,197 INFO L186 Difference]: Start difference. First operand has 40 places, 27 transitions, 116 flow. Second operand 14 states and 164 transitions. [2021-10-15 19:28:22,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 29 transitions, 168 flow [2021-10-15 19:28:22,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 154 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-10-15 19:28:22,202 INFO L242 Difference]: Finished difference. Result has 49 places, 28 transitions, 142 flow [2021-10-15 19:28:22,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=142, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2021-10-15 19:28:22,203 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 30 predicate places. [2021-10-15 19:28:22,203 INFO L470 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 142 flow [2021-10-15 19:28:22,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.541666666666666) internal successors, (277), 24 states have internal predecessors, (277), 0 states have call successors, (0), 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 19:28:22,204 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:22,204 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:22,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:22,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:22,424 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1027328152, now seen corresponding path program 1 times [2021-10-15 19:28:22,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:22,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016516853] [2021-10-15 19:28:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:22,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:23,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:23,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016516853] [2021-10-15 19:28:23,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016516853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:23,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56295516] [2021-10-15 19:28:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:23,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:28:23,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:28:23,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:28:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:23,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 110 conjunts are in the unsatisfiable core [2021-10-15 19:28:23,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:23,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:28:24,080 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:28:24,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 19:28:24,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:28:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:24,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-15 19:28:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:24,594 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:28:24,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-15 19:28:24,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-10-15 19:28:25,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:28:25,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-10-15 19:28:25,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:25,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2021-10-15 19:28:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:25,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:25,717 INFO L354 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2021-10-15 19:28:25,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-10-15 19:28:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:26,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:26,137 INFO L354 Elim1Store]: treesize reduction 119, result has 9.8 percent of original size [2021-10-15 19:28:26,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 183 treesize of output 123 [2021-10-15 19:28:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:26,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:26,180 INFO L354 Elim1Store]: treesize reduction 103, result has 9.6 percent of original size [2021-10-15 19:28:26,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 150 [2021-10-15 19:28:26,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 119 [2021-10-15 19:28:26,213 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-10-15 19:28:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 115 [2021-10-15 19:28:26,526 INFO L354 Elim1Store]: treesize reduction 102, result has 21.5 percent of original size [2021-10-15 19:28:26,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 201 [2021-10-15 19:28:26,601 INFO L354 Elim1Store]: treesize reduction 160, result has 15.3 percent of original size [2021-10-15 19:28:26,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 206 treesize of output 179 [2021-10-15 19:28:26,646 INFO L354 Elim1Store]: treesize reduction 106, result has 25.4 percent of original size [2021-10-15 19:28:26,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 109 [2021-10-15 19:28:27,650 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-10-15 19:28:27,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 302 treesize of output 130 [2021-10-15 19:28:27,696 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-10-15 19:28:27,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 74 [2021-10-15 19:28:27,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:28:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:27,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56295516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:27,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:28:27,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-15 19:28:27,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034409025] [2021-10-15 19:28:27,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-15 19:28:27,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-15 19:28:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1038, Unknown=0, NotChecked=0, Total=1122 [2021-10-15 19:28:27,981 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2021-10-15 19:28:27,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 142 flow. Second operand has 34 states, 34 states have (on average 11.205882352941176) internal successors, (381), 34 states have internal predecessors, (381), 0 states have call successors, (0), 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 19:28:27,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:27,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2021-10-15 19:28:27,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:32,949 INFO L129 PetriNetUnfolder]: 2/38 cut-off events. [2021-10-15 19:28:32,950 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 19:28:32,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 38 events. 2/38 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2021-10-15 19:28:32,951 INFO L132 encePairwiseOnDemand]: 22/36 looper letters, 8 selfloop transitions, 22 changer transitions 0/35 dead transitions. [2021-10-15 19:28:32,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 35 transitions, 228 flow [2021-10-15 19:28:32,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 19:28:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 19:28:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 251 transitions. [2021-10-15 19:28:32,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31691919191919193 [2021-10-15 19:28:32,963 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 251 transitions. [2021-10-15 19:28:32,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 251 transitions. [2021-10-15 19:28:32,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:32,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 251 transitions. [2021-10-15 19:28:32,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.409090909090908) internal successors, (251), 22 states have internal predecessors, (251), 0 states have call successors, (0), 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 19:28:32,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 0 states have call successors, (0), 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 19:28:32,971 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 0 states have call successors, (0), 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 19:28:32,971 INFO L186 Difference]: Start difference. First operand has 49 places, 28 transitions, 142 flow. Second operand 22 states and 251 transitions. [2021-10-15 19:28:32,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 35 transitions, 228 flow [2021-10-15 19:28:32,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 35 transitions, 198 flow, removed 0 selfloop flow, removed 12 redundant places. [2021-10-15 19:28:32,977 INFO L242 Difference]: Finished difference. Result has 60 places, 33 transitions, 189 flow [2021-10-15 19:28:32,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=189, PETRI_PLACES=60, PETRI_TRANSITIONS=33} [2021-10-15 19:28:32,978 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2021-10-15 19:28:32,978 INFO L470 AbstractCegarLoop]: Abstraction has has 60 places, 33 transitions, 189 flow [2021-10-15 19:28:32,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 11.205882352941176) internal successors, (381), 34 states have internal predecessors, (381), 0 states have call successors, (0), 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 19:28:32,979 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:32,980 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:33,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:33,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:28:33,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1027329826, now seen corresponding path program 1 times [2021-10-15 19:28:33,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:33,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221396494] [2021-10-15 19:28:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:33,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:33,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:33,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221396494] [2021-10-15 19:28:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221396494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:33,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652976979] [2021-10-15 19:28:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:33,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:33,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:28:33,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:28:33,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:28:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-15 19:28:34,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:34,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:28:34,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-15 19:28:34,776 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 19:28:34,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-15 19:28:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:35,031 INFO L354 Elim1Store]: treesize reduction 119, result has 9.8 percent of original size [2021-10-15 19:28:35,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 69 [2021-10-15 19:28:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:35,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-10-15 19:28:35,293 INFO L354 Elim1Store]: treesize reduction 178, result has 17.6 percent of original size [2021-10-15 19:28:35,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 118 [2021-10-15 19:28:35,345 INFO L354 Elim1Store]: treesize reduction 66, result has 27.5 percent of original size [2021-10-15 19:28:35,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 115 [2021-10-15 19:28:35,690 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-15 19:28:35,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 103 [2021-10-15 19:28:35,952 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-10-15 19:28:35,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 43 [2021-10-15 19:28:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:35,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652976979] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:35,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:28:35,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-10-15 19:28:35,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021730911] [2021-10-15 19:28:35,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-15 19:28:35,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-15 19:28:35,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-10-15 19:28:35,980 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2021-10-15 19:28:35,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 33 transitions, 189 flow. Second operand has 30 states, 30 states have (on average 12.233333333333333) internal successors, (367), 30 states have internal predecessors, (367), 0 states have call successors, (0), 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 19:28:35,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:35,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2021-10-15 19:28:35,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:38,477 INFO L129 PetriNetUnfolder]: 2/35 cut-off events. [2021-10-15 19:28:38,478 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2021-10-15 19:28:38,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 35 events. 2/35 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/36 useless extension candidates. Maximal degree in co-relation 122. Up to 5 conditions per place. [2021-10-15 19:28:38,486 INFO L132 encePairwiseOnDemand]: 23/36 looper letters, 8 selfloop transitions, 20 changer transitions 0/34 dead transitions. [2021-10-15 19:28:38,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 34 transitions, 242 flow [2021-10-15 19:28:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 19:28:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 19:28:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 237 transitions. [2021-10-15 19:28:38,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.34649122807017546 [2021-10-15 19:28:38,492 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 237 transitions. [2021-10-15 19:28:38,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 237 transitions. [2021-10-15 19:28:38,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:38,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 237 transitions. [2021-10-15 19:28:38,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.473684210526315) internal successors, (237), 19 states have internal predecessors, (237), 0 states have call successors, (0), 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 19:28:38,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 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 19:28:38,499 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 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 19:28:38,500 INFO L186 Difference]: Start difference. First operand has 60 places, 33 transitions, 189 flow. Second operand 19 states and 237 transitions. [2021-10-15 19:28:38,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 34 transitions, 242 flow [2021-10-15 19:28:38,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 34 transitions, 192 flow, removed 5 selfloop flow, removed 15 redundant places. [2021-10-15 19:28:38,515 INFO L242 Difference]: Finished difference. Result has 62 places, 32 transitions, 172 flow [2021-10-15 19:28:38,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=172, PETRI_PLACES=62, PETRI_TRANSITIONS=32} [2021-10-15 19:28:38,516 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 43 predicate places. [2021-10-15 19:28:38,517 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 32 transitions, 172 flow [2021-10-15 19:28:38,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.233333333333333) internal successors, (367), 30 states have internal predecessors, (367), 0 states have call successors, (0), 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 19:28:38,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:38,520 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:38,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:38,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:38,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash 580158531, now seen corresponding path program 2 times [2021-10-15 19:28:38,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:38,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010413617] [2021-10-15 19:28:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:38,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:40,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:40,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010413617] [2021-10-15 19:28:40,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010413617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:40,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764682914] [2021-10-15 19:28:40,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:28:40,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:40,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:28:40,069 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:28:40,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:28:40,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:28:40,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:28:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-15 19:28:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:40,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:28:40,530 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:28:40,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 19:28:40,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:28:40,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:28:40,974 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-15 19:28:40,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-15 19:28:41,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-15 19:28:41,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-15 19:28:41,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:28:41,379 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-10-15 19:28:41,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 67 [2021-10-15 19:28:41,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:28:41,405 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-10-15 19:28:41,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 77 [2021-10-15 19:28:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:41,915 INFO L354 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2021-10-15 19:28:41,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-10-15 19:28:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:42,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:42,214 INFO L354 Elim1Store]: treesize reduction 206, result has 9.3 percent of original size [2021-10-15 19:28:42,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 192 treesize of output 123 [2021-10-15 19:28:42,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:42,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:28:42,260 INFO L354 Elim1Store]: treesize reduction 188, result has 9.2 percent of original size [2021-10-15 19:28:42,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 181 treesize of output 150 [2021-10-15 19:28:42,489 INFO L354 Elim1Store]: treesize reduction 214, result has 11.2 percent of original size [2021-10-15 19:28:42,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 203 treesize of output 175 [2021-10-15 19:28:42,530 INFO L354 Elim1Store]: treesize reduction 114, result has 11.6 percent of original size [2021-10-15 19:28:42,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 168 treesize of output 102 [2021-10-15 19:28:43,588 INFO L354 Elim1Store]: treesize reduction 243, result has 5.4 percent of original size [2021-10-15 19:28:43,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 15 new quantified variables, introduced 21 case distinctions, treesize of input 320 treesize of output 153 [2021-10-15 19:28:43,667 INFO L354 Elim1Store]: treesize reduction 203, result has 4.7 percent of original size [2021-10-15 19:28:43,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 70 [2021-10-15 19:28:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:43,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764682914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:43,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:28:43,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-10-15 19:28:43,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708619923] [2021-10-15 19:28:43,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-15 19:28:43,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:43,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-15 19:28:43,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1117, Unknown=0, NotChecked=0, Total=1190 [2021-10-15 19:28:43,775 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2021-10-15 19:28:43,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 32 transitions, 172 flow. Second operand has 35 states, 35 states have (on average 10.228571428571428) internal successors, (358), 35 states have internal predecessors, (358), 0 states have call successors, (0), 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 19:28:43,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:43,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2021-10-15 19:28:43,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:52,241 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2021-10-15 19:28:52,241 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2021-10-15 19:28:52,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 54 events. 2/54 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 183. Up to 21 conditions per place. [2021-10-15 19:28:52,242 INFO L132 encePairwiseOnDemand]: 23/36 looper letters, 25 selfloop transitions, 19 changer transitions 0/49 dead transitions. [2021-10-15 19:28:52,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 49 transitions, 350 flow [2021-10-15 19:28:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 19:28:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 19:28:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 221 transitions. [2021-10-15 19:28:52,246 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.30694444444444446 [2021-10-15 19:28:52,246 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 221 transitions. [2021-10-15 19:28:52,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 221 transitions. [2021-10-15 19:28:52,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:52,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 221 transitions. [2021-10-15 19:28:52,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 0 states have call successors, (0), 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 19:28:52,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 36.0) internal successors, (756), 21 states have internal predecessors, (756), 0 states have call successors, (0), 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 19:28:52,252 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 36.0) internal successors, (756), 21 states have internal predecessors, (756), 0 states have call successors, (0), 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 19:28:52,253 INFO L186 Difference]: Start difference. First operand has 62 places, 32 transitions, 172 flow. Second operand 20 states and 221 transitions. [2021-10-15 19:28:52,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 49 transitions, 350 flow [2021-10-15 19:28:52,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 49 transitions, 286 flow, removed 0 selfloop flow, removed 18 redundant places. [2021-10-15 19:28:52,259 INFO L242 Difference]: Finished difference. Result has 75 places, 44 transitions, 272 flow [2021-10-15 19:28:52,260 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=272, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2021-10-15 19:28:52,260 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 56 predicate places. [2021-10-15 19:28:52,260 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 272 flow [2021-10-15 19:28:52,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 10.228571428571428) internal successors, (358), 35 states have internal predecessors, (358), 0 states have call successors, (0), 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 19:28:52,261 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:52,261 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:52,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-15 19:28:52,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:52,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 580156857, now seen corresponding path program 2 times [2021-10-15 19:28:52,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:52,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106590479] [2021-10-15 19:28:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:52,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 19:28:52,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:52,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106590479] [2021-10-15 19:28:52,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106590479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:52,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839844135] [2021-10-15 19:28:52,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:28:52,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:28:52,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:28:52,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:28:53,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:28:53,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:28:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:28:53,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 19:28:53,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839844135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:53,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:28:53,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-15 19:28:53,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498309071] [2021-10-15 19:28:53,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:28:53,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:28:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:28:53,281 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 36 [2021-10-15 19:28:53,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 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 19:28:53,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:53,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 36 [2021-10-15 19:28:53,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:53,332 INFO L129 PetriNetUnfolder]: 2/57 cut-off events. [2021-10-15 19:28:53,332 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2021-10-15 19:28:53,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 57 events. 2/57 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 176. Up to 8 conditions per place. [2021-10-15 19:28:53,334 INFO L132 encePairwiseOnDemand]: 32/36 looper letters, 2 selfloop transitions, 5 changer transitions 11/45 dead transitions. [2021-10-15 19:28:53,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 45 transitions, 298 flow [2021-10-15 19:28:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:28:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:28:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2021-10-15 19:28:53,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7870370370370371 [2021-10-15 19:28:53,337 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 170 transitions. [2021-10-15 19:28:53,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 170 transitions. [2021-10-15 19:28:53,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:53,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 170 transitions. [2021-10-15 19:28:53,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 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 19:28:53,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 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 19:28:53,340 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 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 19:28:53,341 INFO L186 Difference]: Start difference. First operand has 75 places, 44 transitions, 272 flow. Second operand 6 states and 170 transitions. [2021-10-15 19:28:53,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 45 transitions, 298 flow [2021-10-15 19:28:53,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 45 transitions, 286 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-15 19:28:53,346 INFO L242 Difference]: Finished difference. Result has 75 places, 34 transitions, 192 flow [2021-10-15 19:28:53,347 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=75, PETRI_TRANSITIONS=34} [2021-10-15 19:28:53,347 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 56 predicate places. [2021-10-15 19:28:53,348 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 34 transitions, 192 flow [2021-10-15 19:28:53,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 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 19:28:53,348 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:53,349 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:53,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:53,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:53,576 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:53,577 INFO L82 PathProgramCache]: Analyzing trace with hash 53221339, now seen corresponding path program 3 times [2021-10-15 19:28:53,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:53,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185993999] [2021-10-15 19:28:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:53,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:28:53,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:53,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185993999] [2021-10-15 19:28:53,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185993999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:28:53,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772293795] [2021-10-15 19:28:53,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:28:53,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:53,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:28:53,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:28:53,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:28:54,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:28:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:28:54,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:28:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:28:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772293795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:54,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:28:54,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-10-15 19:28:54,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449474490] [2021-10-15 19:28:54,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:28:54,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:28:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:28:54,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 36 [2021-10-15 19:28:54,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 34 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 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 19:28:54,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:54,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 36 [2021-10-15 19:28:54,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:54,800 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-10-15 19:28:54,800 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 19:28:54,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 13 events. 0/13 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:28:54,801 INFO L132 encePairwiseOnDemand]: 33/36 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-10-15 19:28:54,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 12 transitions, 65 flow [2021-10-15 19:28:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:28:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:28:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2021-10-15 19:28:54,804 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8166666666666667 [2021-10-15 19:28:54,804 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 147 transitions. [2021-10-15 19:28:54,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 147 transitions. [2021-10-15 19:28:54,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:54,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 147 transitions. [2021-10-15 19:28:54,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 19:28:54,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 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 19:28:54,806 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 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 19:28:54,807 INFO L186 Difference]: Start difference. First operand has 75 places, 34 transitions, 192 flow. Second operand 5 states and 147 transitions. [2021-10-15 19:28:54,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 12 transitions, 65 flow [2021-10-15 19:28:54,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 12 transitions, 60 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 19:28:54,808 INFO L242 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2021-10-15 19:28:54,808 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2021-10-15 19:28:54,809 INFO L334 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2021-10-15 19:28:54,809 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2021-10-15 19:28:54,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 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 19:28:54,813 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:28:54,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:55,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:28:55,023 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:28:55,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:28:55 BoogieIcfgContainer [2021-10-15 19:28:55,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:28:55,031 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:28:55,031 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:28:55,031 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:28:55,032 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:28:13" (3/4) ... [2021-10-15 19:28:55,038 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:28:55,057 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-15 19:28:55,057 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-15 19:28:55,058 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:28:55,059 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:28:55,140 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:28:55,144 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:28:55,146 INFO L168 Benchmark]: Toolchain (without parser) took 43153.37 ms. Allocated memory was 77.6 MB in the beginning and 197.1 MB in the end (delta: 119.5 MB). Free memory was 48.0 MB in the beginning and 70.1 MB in the end (delta: -22.1 MB). Peak memory consumption was 97.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:55,146 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 77.6 MB. Free memory is still 38.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:28:55,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 738.94 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 47.8 MB in the beginning and 81.7 MB in the end (delta: -33.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:55,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.85 ms. Allocated memory is still 113.2 MB. Free memory was 81.7 MB in the beginning and 79.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:55,147 INFO L168 Benchmark]: Boogie Preprocessor took 114.55 ms. Allocated memory is still 113.2 MB. Free memory was 79.4 MB in the beginning and 78.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:55,147 INFO L168 Benchmark]: RCFGBuilder took 632.68 ms. Allocated memory is still 113.2 MB. Free memory was 78.0 MB in the beginning and 64.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:55,148 INFO L168 Benchmark]: TraceAbstraction took 41442.64 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 64.3 MB in the beginning and 74.3 MB in the end (delta: -10.1 MB). Peak memory consumption was 74.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:55,148 INFO L168 Benchmark]: Witness Printer took 113.95 ms. Allocated memory is still 197.1 MB. Free memory was 74.3 MB in the beginning and 70.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:55,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 77.6 MB. Free memory is still 38.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 738.94 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 47.8 MB in the beginning and 81.7 MB in the end (delta: -33.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 87.85 ms. Allocated memory is still 113.2 MB. Free memory was 81.7 MB in the beginning and 79.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 114.55 ms. Allocated memory is still 113.2 MB. Free memory was 79.4 MB in the beginning and 78.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 632.68 ms. Allocated memory is still 113.2 MB. Free memory was 78.0 MB in the beginning and 64.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 41442.64 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 64.3 MB in the beginning and 74.3 MB in the end (delta: -10.1 MB). Peak memory consumption was 74.1 MB. Max. memory is 16.1 GB. * Witness Printer took 113.95 ms. Allocated memory is still 197.1 MB. Free memory was 74.3 MB in the beginning and 70.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 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: 629]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 41344.9ms, OverallIterations: 11, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 19137.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28 SDtfs, 308 SDslu, 98 SDs, 0 SdLazy, 1882 SolverSat, 225 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 7599.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 349 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 16412.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=272occurred in iteration=9, InterpolantAutomatonStates: 115, 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: 258.1ms SsaConstructionTime, 1483.0ms SatisfiabilityAnalysisTime, 16665.6ms InterpolantComputationTime, 416 NumberOfCodeBlocks, 416 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 398 ConstructedInterpolants, 9 QuantifiedInterpolants, 9436 SizeOfPredicates, 153 NumberOfNonLiveVariables, 1457 ConjunctsInSsa, 383 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 81/160 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 19:28:55,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_461df4ed-d72a-46d8-bb3a-f399986713fa/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...