./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c904d43a56f7d48de83a40717b42c35f909963a3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:40:36,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:40:36,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:40:37,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:40:37,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:40:37,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:40:37,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:40:37,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:40:37,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:40:37,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:40:37,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:40:37,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:40:37,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:40:37,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:40:37,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:40:37,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:40:37,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:40:37,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:40:37,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:40:37,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:40:37,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:40:37,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:40:37,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:40:37,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:40:37,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:40:37,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:40:37,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:40:37,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:40:37,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:40:37,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:40:37,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:40:37,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:40:37,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:40:37,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:40:37,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:40:37,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:40:37,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:40:37,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:40:37,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:40:37,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:40:37,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:40:37,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:40:37,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:40:37,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:40:37,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:40:37,154 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:40:37,154 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:40:37,154 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:40:37,155 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:40:37,155 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:40:37,155 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:40:37,155 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:40:37,155 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:40:37,156 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:40:37,156 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:40:37,156 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:40:37,157 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:40:37,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:40:37,158 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:40:37,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:40:37,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:40:37,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:40:37,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:40:37,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:40:37,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:40:37,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:40:37,160 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:40:37,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:40:37,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:40:37,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:40:37,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:40:37,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:40:37,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:40:37,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:40:37,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:40:37,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:40:37,162 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:40:37,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:40:37,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:40:37,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:40:37,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:40:37,163 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c904d43a56f7d48de83a40717b42c35f909963a3 [2020-12-03 12:40:37,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:40:37,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:40:37,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:40:37,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:40:37,519 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:40:37,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2020-12-03 12:40:37,592 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/data/c5ee6b1c8/743c04cefcd14e8a8c34fb5923a7869b/FLAGb949fb048 [2020-12-03 12:40:38,033 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:40:38,034 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2020-12-03 12:40:38,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/data/c5ee6b1c8/743c04cefcd14e8a8c34fb5923a7869b/FLAGb949fb048 [2020-12-03 12:40:38,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/data/c5ee6b1c8/743c04cefcd14e8a8c34fb5923a7869b [2020-12-03 12:40:38,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:40:38,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:40:38,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:40:38,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:40:38,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:40:38,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51dd977d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38, skipping insertion in model container [2020-12-03 12:40:38,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:40:38,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:40:38,630 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c[548,561] [2020-12-03 12:40:38,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:40:38,647 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:40:38,663 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c[548,561] [2020-12-03 12:40:38,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:40:38,678 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:40:38,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38 WrapperNode [2020-12-03 12:40:38,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:40:38,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:40:38,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:40:38,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:40:38,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:40:38,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:40:38,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:40:38,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:40:38,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... [2020-12-03 12:40:38,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:40:38,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:40:38,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:40:38,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:40:38,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:40:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:40:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:40:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-12-03 12:40:38,809 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-12-03 12:40:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:40:38,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:40:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-03 12:40:38,810 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-03 12:40:39,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:40:39,030 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 12:40:39,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:40:39 BoogieIcfgContainer [2020-12-03 12:40:39,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:40:39,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:40:39,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:40:39,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:40:39,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:40:38" (1/3) ... [2020-12-03 12:40:39,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbd39bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:40:39, skipping insertion in model container [2020-12-03 12:40:39,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:38" (2/3) ... [2020-12-03 12:40:39,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbd39bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:40:39, skipping insertion in model container [2020-12-03 12:40:39,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:40:39" (3/3) ... [2020-12-03 12:40:39,041 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-12-03 12:40:39,055 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:40:39,058 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:40:39,085 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 12:40:39,150 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:40:39,151 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:40:39,151 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:40:39,151 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:40:39,151 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:40:39,152 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:40:39,152 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:40:39,152 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:40:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-03 12:40:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:40:39,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:39,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:40:39,173 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:40:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash -406374326, now seen corresponding path program 1 times [2020-12-03 12:40:39,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:39,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983084439] [2020-12-03 12:40:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:40:39,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983084439] [2020-12-03 12:40:39,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:40:39,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:40:39,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750272101] [2020-12-03 12:40:39,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:40:39,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:40:39,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:40:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:40:39,456 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-12-03 12:40:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:40:39,573 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-03 12:40:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:40:39,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-03 12:40:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:40:39,587 INFO L225 Difference]: With dead ends: 28 [2020-12-03 12:40:39,587 INFO L226 Difference]: Without dead ends: 20 [2020-12-03 12:40:39,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:40:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-03 12:40:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-03 12:40:39,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:40:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-03 12:40:39,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2020-12-03 12:40:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:40:39,640 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-03 12:40:39,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:40:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-03 12:40:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-03 12:40:39,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:39,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:40:39,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:40:39,645 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:40:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:39,654 INFO L82 PathProgramCache]: Analyzing trace with hash -911562000, now seen corresponding path program 1 times [2020-12-03 12:40:39,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:39,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759507210] [2020-12-03 12:40:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:40:39,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759507210] [2020-12-03 12:40:39,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:40:39,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 12:40:39,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000553467] [2020-12-03 12:40:39,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 12:40:39,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:40:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 12:40:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:40:39,809 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-12-03 12:40:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:40:39,912 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-03 12:40:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:40:39,912 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-03 12:40:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:40:39,915 INFO L225 Difference]: With dead ends: 29 [2020-12-03 12:40:39,915 INFO L226 Difference]: Without dead ends: 25 [2020-12-03 12:40:39,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:40:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-03 12:40:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-12-03 12:40:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:40:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-03 12:40:39,930 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-12-03 12:40:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:40:39,930 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-03 12:40:39,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 12:40:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-03 12:40:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-03 12:40:39,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:39,933 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:40:39,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:40:39,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:40:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:39,939 INFO L82 PathProgramCache]: Analyzing trace with hash -941711854, now seen corresponding path program 1 times [2020-12-03 12:40:39,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:39,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161400272] [2020-12-03 12:40:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:40:40,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161400272] [2020-12-03 12:40:40,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511046204] [2020-12-03 12:40:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:40:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:40:40,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:40:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:40:40,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:40:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:40:40,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709852873] [2020-12-03 12:40:40,727 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-12-03 12:40:40,727 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:40:40,732 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:40:40,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:40:40,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 12 [2020-12-03 12:40:40,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781472510] [2020-12-03 12:40:40,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:40:40,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:40:40,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:40:40,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:40:40,737 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2020-12-03 12:40:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:40:40,860 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-03 12:40:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 12:40:40,860 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-12-03 12:40:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:40:40,864 INFO L225 Difference]: With dead ends: 35 [2020-12-03 12:40:40,864 INFO L226 Difference]: Without dead ends: 31 [2020-12-03 12:40:40,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-03 12:40:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-03 12:40:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-12-03 12:40:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-03 12:40:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-03 12:40:40,879 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-12-03 12:40:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:40:40,880 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-03 12:40:40,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:40:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-03 12:40:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 12:40:40,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:40,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:40:41,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-03 12:40:41,096 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:40:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:41,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1503676104, now seen corresponding path program 1 times [2020-12-03 12:40:41,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:41,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899410663] [2020-12-03 12:40:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-03 12:40:41,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899410663] [2020-12-03 12:40:41,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390107101] [2020-12-03 12:40:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:40:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:41,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-03 12:40:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:40:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-03 12:40:41,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:40:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:40:42,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035870705] [2020-12-03 12:40:42,089 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-12-03 12:40:42,089 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:40:42,090 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:40:42,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:40:42,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 14 [2020-12-03 12:40:42,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988603341] [2020-12-03 12:40:42,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 12:40:42,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:40:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 12:40:42,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:40:42,093 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2020-12-03 12:40:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:40:42,215 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-03 12:40:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:40:42,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-12-03 12:40:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:40:42,217 INFO L225 Difference]: With dead ends: 41 [2020-12-03 12:40:42,217 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 12:40:42,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:40:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 12:40:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-12-03 12:40:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-03 12:40:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-03 12:40:42,223 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-12-03 12:40:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:40:42,224 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-03 12:40:42,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 12:40:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-03 12:40:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-03 12:40:42,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:42,225 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:40:42,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:40:42,440 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:40:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:42,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1206630438, now seen corresponding path program 2 times [2020-12-03 12:40:42,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:42,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867898585] [2020-12-03 12:40:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-03 12:40:42,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867898585] [2020-12-03 12:40:42,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128786676] [2020-12-03 12:40:42,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:40:42,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-03 12:40:42,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:40:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-03 12:40:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:40:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-03 12:40:42,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:40:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-03 12:40:43,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630678109] [2020-12-03 12:40:43,603 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-12-03 12:40:43,603 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:40:43,604 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:40:43,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:40:43,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 15 [2020-12-03 12:40:43,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547982379] [2020-12-03 12:40:43,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-03 12:40:43,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:40:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-03 12:40:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-03 12:40:43,607 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 15 states. [2020-12-03 12:40:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:40:43,744 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-03 12:40:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 12:40:43,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-03 12:40:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:40:43,746 INFO L225 Difference]: With dead ends: 47 [2020-12-03 12:40:43,746 INFO L226 Difference]: Without dead ends: 43 [2020-12-03 12:40:43,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-12-03 12:40:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-03 12:40:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-12-03 12:40:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-03 12:40:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-03 12:40:43,763 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2020-12-03 12:40:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:40:43,764 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-03 12:40:43,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-03 12:40:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-03 12:40:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-03 12:40:43,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:43,765 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:40:43,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:40:43,969 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:40:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash -415290496, now seen corresponding path program 2 times [2020-12-03 12:40:43,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:43,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839505491] [2020-12-03 12:40:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-03 12:40:44,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839505491] [2020-12-03 12:40:44,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048251180] [2020-12-03 12:40:44,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:40:44,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-03 12:40:44,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:40:44,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-03 12:40:44,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:40:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-03 12:40:44,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:40:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-03 12:40:44,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114086095] [2020-12-03 12:40:44,893 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-12-03 12:40:44,894 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:40:44,894 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:40:44,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:40:44,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2020-12-03 12:40:44,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127482288] [2020-12-03 12:40:44,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-03 12:40:44,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:40:44,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-03 12:40:44,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-03 12:40:44,898 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2020-12-03 12:40:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:40:44,992 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-12-03 12:40:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-03 12:40:44,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-12-03 12:40:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:40:44,994 INFO L225 Difference]: With dead ends: 53 [2020-12-03 12:40:44,994 INFO L226 Difference]: Without dead ends: 49 [2020-12-03 12:40:44,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-03 12:40:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-03 12:40:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-12-03 12:40:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 12:40:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-03 12:40:45,002 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2020-12-03 12:40:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:40:45,002 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-03 12:40:45,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-03 12:40:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-03 12:40:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-03 12:40:45,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:45,004 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:40:45,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:40:45,220 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:40:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash -841075294, now seen corresponding path program 3 times [2020-12-03 12:40:45,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:45,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050791732] [2020-12-03 12:40:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-03 12:40:45,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050791732] [2020-12-03 12:40:45,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:40:45,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-03 12:40:45,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714798117] [2020-12-03 12:40:45,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:40:45,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:40:45,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:40:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:40:45,386 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2020-12-03 12:40:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:40:45,552 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-03 12:40:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:40:45,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-12-03 12:40:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:40:45,554 INFO L225 Difference]: With dead ends: 59 [2020-12-03 12:40:45,554 INFO L226 Difference]: Without dead ends: 35 [2020-12-03 12:40:45,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-12-03 12:40:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-03 12:40:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-03 12:40:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 12:40:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-03 12:40:45,560 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-12-03 12:40:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:40:45,560 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-03 12:40:45,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:40:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-03 12:40:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-03 12:40:45,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:45,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:40:45,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-03 12:40:45,562 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:40:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1634140616, now seen corresponding path program 3 times [2020-12-03 12:40:45,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:45,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403130808] [2020-12-03 12:40:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:40:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-03 12:40:45,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403130808] [2020-12-03 12:40:45,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:40:45,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-03 12:40:45,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202292245] [2020-12-03 12:40:45,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-03 12:40:45,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:40:45,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-03 12:40:45,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:40:45,760 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-12-03 12:40:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:40:45,896 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-12-03 12:40:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-03 12:40:45,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-12-03 12:40:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:40:45,898 INFO L225 Difference]: With dead ends: 35 [2020-12-03 12:40:45,898 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:40:45,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-03 12:40:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:40:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:40:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:40:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:40:45,900 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-12-03 12:40:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:40:45,900 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:40:45,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-03 12:40:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:40:45,900 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:40:45,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-03 12:40:45,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:40:45,933 INFO L258 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= |id2_#in~x| id2_~x) (<= id2_~x |id2_#in~x|)) [2020-12-03 12:40:45,933 INFO L262 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-03 12:40:45,933 INFO L262 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-12-03 12:40:45,933 INFO L262 CegarLoopResult]: For program point id2EXIT(lines 14 17) no Hoare annotation was computed. [2020-12-03 12:40:45,933 INFO L265 CegarLoopResult]: At program point id2ENTRY(lines 14 17) the Hoare annotation is: true [2020-12-03 12:40:45,933 INFO L262 CegarLoopResult]: For program point id2FINAL(lines 14 17) no Hoare annotation was computed. [2020-12-03 12:40:45,933 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:40:45,933 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 23) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L258 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point L19(lines 19 25) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point idFINAL(lines 9 12) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L258 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= id_~x |id_#in~x|) (<= |id_#in~x| id_~x)) [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point idEXIT(lines 9 12) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-12-03 12:40:45,934 INFO L262 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-12-03 12:40:45,935 INFO L265 CegarLoopResult]: At program point idENTRY(lines 9 12) the Hoare annotation is: true [2020-12-03 12:40:45,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:40:45 BoogieIcfgContainer [2020-12-03 12:40:45,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:40:45,940 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:40:45,940 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:40:45,940 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:40:45,940 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:40:39" (3/4) ... [2020-12-03 12:40:45,943 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:40:45,949 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2020-12-03 12:40:45,949 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-12-03 12:40:45,953 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-03 12:40:45,953 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-03 12:40:45,954 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:40:45,954 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:40:46,000 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a6c4d494-f290-4ba7-8c26-aad51d5c8a92/bin/utaipan/witness.graphml [2020-12-03 12:40:46,000 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:40:46,001 INFO L168 Benchmark]: Toolchain (without parser) took 7572.45 ms. Allocated memory was 71.3 MB in the beginning and 155.2 MB in the end (delta: 83.9 MB). Free memory was 39.3 MB in the beginning and 132.0 MB in the end (delta: -92.7 MB). Peak memory consumption was 77.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:46,001 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 51.5 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:40:46,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.21 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 39.1 MB in the beginning and 63.8 MB in the end (delta: -24.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:46,002 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.09 ms. Allocated memory is still 86.0 MB. Free memory was 63.6 MB in the beginning and 62.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:46,002 INFO L168 Benchmark]: Boogie Preprocessor took 20.38 ms. Allocated memory is still 86.0 MB. Free memory was 62.5 MB in the beginning and 61.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:40:46,003 INFO L168 Benchmark]: RCFGBuilder took 298.33 ms. Allocated memory is still 86.0 MB. Free memory was 61.4 MB in the beginning and 48.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:46,003 INFO L168 Benchmark]: TraceAbstraction took 6905.45 ms. Allocated memory was 86.0 MB in the beginning and 155.2 MB in the end (delta: 69.2 MB). Free memory was 47.9 MB in the beginning and 48.0 MB in the end (delta: -12.7 kB). Peak memory consumption was 70.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:46,003 INFO L168 Benchmark]: Witness Printer took 60.11 ms. Allocated memory is still 155.2 MB. Free memory was 48.0 MB in the beginning and 132.0 MB in the end (delta: -84.1 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:46,006 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 51.5 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.21 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 39.1 MB in the beginning and 63.8 MB in the end (delta: -24.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.09 ms. Allocated memory is still 86.0 MB. Free memory was 63.6 MB in the beginning and 62.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.38 ms. Allocated memory is still 86.0 MB. Free memory was 62.5 MB in the beginning and 61.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 298.33 ms. Allocated memory is still 86.0 MB. Free memory was 61.4 MB in the beginning and 48.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6905.45 ms. Allocated memory was 86.0 MB in the beginning and 155.2 MB in the end (delta: 69.2 MB). Free memory was 47.9 MB in the beginning and 48.0 MB in the end (delta: -12.7 kB). Peak memory consumption was 70.8 MB. Max. memory is 16.1 GB. * Witness Printer took 60.11 ms. Allocated memory is still 155.2 MB. Free memory was 48.0 MB in the beginning and 132.0 MB in the end (delta: -84.1 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.7s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 145 SDtfs, 139 SDslu, 807 SDs, 0 SdLazy, 469 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 358 GetRequests, 244 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 23 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 464 ConstructedInterpolants, 0 QuantifiedInterpolants, 45696 SizeOfPredicates, 16 NumberOfNonLiveVariables, 404 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 203/312 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...