./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b2_o3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b2_o3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg --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 27149dc6702b40ed508ca85da6c2aa8aa33688ab27cc92cc19b394120cb70fd9 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:12:41,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:12:41,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:12:41,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:12:41,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:12:41,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:12:41,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:12:41,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:12:41,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:12:41,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:12:41,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:12:41,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:12:41,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:12:41,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:12:41,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:12:41,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:12:41,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:12:41,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:12:41,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:12:41,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:12:41,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:12:41,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:12:41,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:12:41,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:12:41,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:12:41,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:12:41,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:12:41,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:12:41,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:12:41,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:12:41,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:12:41,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:12:41,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:12:41,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:12:41,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:12:41,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:12:41,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:12:41,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:12:41,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:12:41,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:12:41,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:12:41,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:12:41,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:12:41,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:12:41,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:12:41,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:12:41,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:12:41,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:12:41,550 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:12:41,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:12:41,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:12:41,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:12:41,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:12:41,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:12:41,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:12:41,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:12:41,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:12:41,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:12:41,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:12:41,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:12:41,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:12:41,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:12:41,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:12:41,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:12:41,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:12:41,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:12:41,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:12:41,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:12:41,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:12:41,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:12:41,554 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:12:41,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:12:41,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:12:41,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:12:41,555 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_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27149dc6702b40ed508ca85da6c2aa8aa33688ab27cc92cc19b394120cb70fd9 [2021-10-28 09:12:41,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:12:41,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:12:41,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:12:41,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:12:41,842 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:12:41,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/recursive-simple/id2_b2_o3.c [2021-10-28 09:12:41,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/data/11e2787cf/65fd4db087c041789938c3bdf95ab3ce/FLAGef850400b [2021-10-28 09:12:42,342 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:12:42,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/sv-benchmarks/c/recursive-simple/id2_b2_o3.c [2021-10-28 09:12:42,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/data/11e2787cf/65fd4db087c041789938c3bdf95ab3ce/FLAGef850400b [2021-10-28 09:12:42,737 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/data/11e2787cf/65fd4db087c041789938c3bdf95ab3ce [2021-10-28 09:12:42,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:12:42,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:12:42,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:12:42,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:12:42,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:12:42,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:12:42" (1/1) ... [2021-10-28 09:12:42,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36229a56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:42, skipping insertion in model container [2021-10-28 09:12:42,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:12:42" (1/1) ... [2021-10-28 09:12:42,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:12:42,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:12:42,940 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_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/sv-benchmarks/c/recursive-simple/id2_b2_o3.c[771,784] [2021-10-28 09:12:42,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:12:42,956 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:12:42,994 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_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/sv-benchmarks/c/recursive-simple/id2_b2_o3.c[771,784] [2021-10-28 09:12:42,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:12:43,007 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:12:43,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43 WrapperNode [2021-10-28 09:12:43,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:12:43,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:12:43,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:12:43,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:12:43,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:12:43,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:12:43,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:12:43,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:12:43,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:12:43,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:12:43,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:12:43,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:12:43,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (1/1) ... [2021-10-28 09:12:43,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:12:43,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:12:43,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:12:43,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:12:43,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:12:43,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:12:43,127 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-10-28 09:12:43,127 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-10-28 09:12:43,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:12:43,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:12:43,128 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-10-28 09:12:43,128 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-10-28 09:12:43,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:12:43,301 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:12:43,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:12:43 BoogieIcfgContainer [2021-10-28 09:12:43,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:12:43,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:12:43,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:12:43,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:12:43,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:12:42" (1/3) ... [2021-10-28 09:12:43,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69af1506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:12:43, skipping insertion in model container [2021-10-28 09:12:43,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:12:43" (2/3) ... [2021-10-28 09:12:43,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69af1506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:12:43, skipping insertion in model container [2021-10-28 09:12:43,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:12:43" (3/3) ... [2021-10-28 09:12:43,312 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2021-10-28 09:12:43,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:12:43,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:12:43,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:12:43,399 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:12:43,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:12:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:12:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:12:43,430 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:43,431 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:43,432 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash 794002500, now seen corresponding path program 1 times [2021-10-28 09:12:43,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:43,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276132406] [2021-10-28 09:12:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:43,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:12:43,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:43,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276132406] [2021-10-28 09:12:43,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276132406] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:43,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:43,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:12:43,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291928966] [2021-10-28 09:12:43,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:12:43,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:12:43,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:43,744 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:12:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:43,792 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-10-28 09:12:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:12:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:12:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:43,802 INFO L225 Difference]: With dead ends: 36 [2021-10-28 09:12:43,802 INFO L226 Difference]: Without dead ends: 23 [2021-10-28 09:12:43,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-28 09:12:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-28 09:12:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 09:12:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-28 09:12:43,840 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2021-10-28 09:12:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:43,841 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-28 09:12:43,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:12:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-28 09:12:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:12:43,843 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:43,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:43,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:12:43,844 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1040166181, now seen corresponding path program 1 times [2021-10-28 09:12:43,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:43,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836710475] [2021-10-28 09:12:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:43,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:43,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:43,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:12:44,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:44,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836710475] [2021-10-28 09:12:44,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836710475] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:44,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:44,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:12:44,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325034554] [2021-10-28 09:12:44,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:12:44,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:44,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:12:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:44,056 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 09:12:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:44,091 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-10-28 09:12:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:12:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-10-28 09:12:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:44,094 INFO L225 Difference]: With dead ends: 41 [2021-10-28 09:12:44,094 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 09:12:44,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 09:12:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-10-28 09:12:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 09:12:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-28 09:12:44,107 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2021-10-28 09:12:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:44,107 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-28 09:12:44,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 09:12:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-28 09:12:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:12:44,108 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:44,108 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:44,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:12:44,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:44,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1068795332, now seen corresponding path program 1 times [2021-10-28 09:12:44,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:44,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86007475] [2021-10-28 09:12:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:44,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:12:44,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:44,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86007475] [2021-10-28 09:12:44,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86007475] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:44,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:44,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:12:44,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276089776] [2021-10-28 09:12:44,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:12:44,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:44,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:12:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:12:44,390 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 09:12:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:44,433 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-10-28 09:12:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:12:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-10-28 09:12:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:44,434 INFO L225 Difference]: With dead ends: 33 [2021-10-28 09:12:44,435 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 09:12:44,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:12:44,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 09:12:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-10-28 09:12:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 09:12:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-28 09:12:44,455 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2021-10-28 09:12:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:44,456 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-28 09:12:44,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 09:12:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-28 09:12:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:12:44,459 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:44,459 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:44,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:12:44,459 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1632008158, now seen corresponding path program 1 times [2021-10-28 09:12:44,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:44,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102606271] [2021-10-28 09:12:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:44,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:12:44,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:44,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102606271] [2021-10-28 09:12:44,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102606271] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:44,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:44,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:12:44,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258169118] [2021-10-28 09:12:44,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:12:44,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:44,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:12:44,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:44,637 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:12:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:44,651 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-10-28 09:12:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:12:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-10-28 09:12:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:44,653 INFO L225 Difference]: With dead ends: 45 [2021-10-28 09:12:44,653 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 09:12:44,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:12:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 09:12:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-10-28 09:12:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 09:12:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-28 09:12:44,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2021-10-28 09:12:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:44,667 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-28 09:12:44,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:12:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-28 09:12:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:12:44,669 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:44,670 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:44,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:12:44,671 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1435494653, now seen corresponding path program 1 times [2021-10-28 09:12:44,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:44,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796842381] [2021-10-28 09:12:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:44,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:12:44,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:44,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796842381] [2021-10-28 09:12:44,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796842381] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:44,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:44,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:12:44,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630592868] [2021-10-28 09:12:44,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:12:44,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:44,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:12:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:12:44,865 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:12:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:44,913 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-10-28 09:12:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:12:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-10-28 09:12:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:44,915 INFO L225 Difference]: With dead ends: 49 [2021-10-28 09:12:44,915 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 09:12:44,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:12:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 09:12:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-10-28 09:12:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 09:12:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-10-28 09:12:44,923 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2021-10-28 09:12:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:44,923 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-10-28 09:12:44,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:12:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-10-28 09:12:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:12:44,925 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:44,925 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:44,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:12:44,926 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1464123804, now seen corresponding path program 1 times [2021-10-28 09:12:44,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:44,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431007435] [2021-10-28 09:12:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:44,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:45,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:45,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:45,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:12:45,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:45,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431007435] [2021-10-28 09:12:45,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431007435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:12:45,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144048123] [2021-10-28 09:12:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:45,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:12:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:12:45,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:12:45,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:12:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:45,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:12:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:12:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:12:45,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144048123] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:12:45,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:12:45,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 09:12:45,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887114178] [2021-10-28 09:12:45,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:12:45,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:45,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:12:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:12:45,515 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:12:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:45,602 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-10-28 09:12:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:12:45,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-10-28 09:12:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:45,606 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:12:45,606 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 09:12:45,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:12:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 09:12:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-10-28 09:12:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 09:12:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-28 09:12:45,622 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2021-10-28 09:12:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:45,622 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-28 09:12:45,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:12:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-28 09:12:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:12:45,629 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:45,630 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:45,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:12:45,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 09:12:45,854 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash 965852917, now seen corresponding path program 1 times [2021-10-28 09:12:45,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:45,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196028982] [2021-10-28 09:12:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:45,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:45,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:45,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:12:46,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:46,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196028982] [2021-10-28 09:12:46,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196028982] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:12:46,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:12:46,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:12:46,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8635255] [2021-10-28 09:12:46,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:12:46,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:12:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:12:46,092 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 09:12:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:46,134 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-10-28 09:12:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:12:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-10-28 09:12:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:46,138 INFO L225 Difference]: With dead ends: 55 [2021-10-28 09:12:46,138 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 09:12:46,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:12:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 09:12:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-10-28 09:12:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 09:12:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-10-28 09:12:46,155 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2021-10-28 09:12:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:46,156 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-10-28 09:12:46,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 09:12:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-10-28 09:12:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:12:46,160 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:46,161 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:46,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:12:46,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:46,162 INFO L85 PathProgramCache]: Analyzing trace with hash 769339412, now seen corresponding path program 1 times [2021-10-28 09:12:46,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:46,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523613660] [2021-10-28 09:12:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:46,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:12:46,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:46,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523613660] [2021-10-28 09:12:46,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523613660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:12:46,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234138089] [2021-10-28 09:12:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:46,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:12:46,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:12:46,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:12:46,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:12:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:46,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:12:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:12:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:12:46,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234138089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:12:46,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:12:46,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 09:12:46,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534142591] [2021-10-28 09:12:46,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:12:46,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:46,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:12:46,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:12:46,679 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 09:12:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:46,765 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-10-28 09:12:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:12:46,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-10-28 09:12:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:46,771 INFO L225 Difference]: With dead ends: 61 [2021-10-28 09:12:46,771 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 09:12:46,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:12:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 09:12:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-10-28 09:12:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 09:12:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-28 09:12:46,790 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 31 [2021-10-28 09:12:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:46,791 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-28 09:12:46,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 09:12:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-28 09:12:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:12:46,795 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:12:46,795 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:46,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:12:47,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 09:12:47,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:12:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:12:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1609637876, now seen corresponding path program 2 times [2021-10-28 09:12:47,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:12:47,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284361150] [2021-10-28 09:12:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:12:47,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:12:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:47,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:47,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:47,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:47,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:12:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:12:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 09:12:47,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:12:47,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284361150] [2021-10-28 09:12:47,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284361150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:12:47,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161989107] [2021-10-28 09:12:47,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:12:47,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:12:47,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:12:47,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:12:47,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:12:47,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:12:47,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:12:47,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 09:12:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:12:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 09:12:47,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161989107] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:12:47,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:12:47,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2021-10-28 09:12:47,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738805272] [2021-10-28 09:12:47,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:12:47,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:12:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:12:47,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:12:47,646 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 13 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 1 states have call successors, (7) [2021-10-28 09:12:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:12:47,758 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-10-28 09:12:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:12:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 13 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 1 states have call successors, (7) Word has length 38 [2021-10-28 09:12:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:12:47,760 INFO L225 Difference]: With dead ends: 55 [2021-10-28 09:12:47,760 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:12:47,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:12:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:12:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:12:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:12:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:12:47,762 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-10-28 09:12:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:12:47,763 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:12:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 13 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 1 states have call successors, (7) [2021-10-28 09:12:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:12:47,763 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:12:47,766 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:12:47,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:12:47,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 09:12:47,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:12:47,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:12:47,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:12:47,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:12:47,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:12:47,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:12:47,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:12:47,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:12:48,000 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-10-28 09:12:48,000 INFO L857 garLoopResultBuilder]: For program point L18-1(line 18) no Hoare annotation was computed. [2021-10-28 09:12:48,001 INFO L857 garLoopResultBuilder]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2021-10-28 09:12:48,001 INFO L860 garLoopResultBuilder]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2021-10-28 09:12:48,001 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-28 09:12:48,001 INFO L857 garLoopResultBuilder]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2021-10-28 09:12:48,001 INFO L860 garLoopResultBuilder]: At program point L18(line 18) the Hoare annotation is: true [2021-10-28 09:12:48,001 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:12:48,002 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:12:48,002 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:12:48,002 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:12:48,002 INFO L857 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2021-10-28 09:12:48,002 INFO L857 garLoopResultBuilder]: For program point L26(lines 26 28) no Hoare annotation was computed. [2021-10-28 09:12:48,002 INFO L860 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2021-10-28 09:12:48,005 INFO L857 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-10-28 09:12:48,005 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2021-10-28 09:12:48,005 INFO L857 garLoopResultBuilder]: For program point L23(lines 23 29) no Hoare annotation was computed. [2021-10-28 09:12:48,006 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2021-10-28 09:12:48,006 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-10-28 09:12:48,006 INFO L860 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: true [2021-10-28 09:12:48,006 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2021-10-28 09:12:48,006 INFO L857 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-10-28 09:12:48,006 INFO L857 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-10-28 09:12:48,007 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2021-10-28 09:12:48,013 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:12:48,015 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:12:48,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:12:48 BoogieIcfgContainer [2021-10-28 09:12:48,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:12:48,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:12:48,018 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:12:48,018 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:12:48,018 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:12:43" (3/4) ... [2021-10-28 09:12:48,021 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:12:48,028 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2021-10-28 09:12:48,029 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-10-28 09:12:48,033 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 09:12:48,033 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:12:48,033 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:12:48,033 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:12:48,074 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:12:48,074 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:12:48,076 INFO L168 Benchmark]: Toolchain (without parser) took 5333.62 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 82.1 MB in the beginning and 79.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:48,077 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 81.8 MB. Free memory is still 36.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:12:48,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.42 ms. Allocated memory is still 115.3 MB. Free memory was 81.9 MB in the beginning and 91.5 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:48,078 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.41 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 89.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:48,081 INFO L168 Benchmark]: Boogie Preprocessor took 17.41 ms. Allocated memory is still 115.3 MB. Free memory was 89.8 MB in the beginning and 88.8 MB in the end (delta: 957.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:12:48,081 INFO L168 Benchmark]: RCFGBuilder took 251.57 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 79.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:48,082 INFO L168 Benchmark]: TraceAbstraction took 4712.38 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 78.9 MB in the beginning and 82.1 MB in the end (delta: -3.3 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:48,082 INFO L168 Benchmark]: Witness Printer took 56.67 ms. Allocated memory is still 138.4 MB. Free memory was 82.1 MB in the beginning and 79.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:12:48,085 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 81.8 MB. Free memory is still 36.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.42 ms. Allocated memory is still 115.3 MB. Free memory was 81.9 MB in the beginning and 91.5 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.41 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 89.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.41 ms. Allocated memory is still 115.3 MB. Free memory was 89.8 MB in the beginning and 88.8 MB in the end (delta: 957.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 251.57 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 79.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4712.38 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 78.9 MB in the beginning and 82.1 MB in the end (delta: -3.3 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. * Witness Printer took 56.67 ms. Allocated memory is still 138.4 MB. Free memory was 82.1 MB in the beginning and 79.0 MB in the end (delta: 3.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 27]: 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 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.6s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 37 SDslu, 1452 SDs, 0 SdLazy, 383 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=8, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 309 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 1013 SizeOfPredicates, 11 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 65/93 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! [2021-10-28 09:12:48,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb1f7dee-82d4-45ef-9f5c-eaf34f691e88/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...