./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e28603c63113c1566dc2e06da17c63059f80486 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:32:14,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:32:14,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:32:14,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:32:14,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:32:14,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:32:14,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:32:14,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:32:14,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:32:14,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:32:14,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:32:14,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:32:14,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:32:14,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:32:14,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:32:14,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:32:14,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:32:14,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:32:14,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:32:14,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:32:14,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:32:14,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:32:14,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:32:14,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:32:14,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:32:14,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:32:14,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:32:14,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:32:14,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:32:14,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:32:14,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:32:14,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:32:14,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:32:14,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:32:14,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:32:14,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:32:14,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:32:14,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:32:14,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:32:14,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:32:14,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:32:14,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:32:14,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:32:14,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:32:14,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:32:14,211 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:32:14,211 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:32:14,211 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:32:14,212 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:32:14,212 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:32:14,212 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:32:14,212 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:32:14,213 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:32:14,214 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:32:14,214 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:32:14,214 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:32:14,214 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:32:14,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:32:14,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:32:14,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:32:14,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:32:14,216 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:32:14,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:32:14,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:32:14,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:32:14,217 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:32:14,217 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:32:14,217 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:32:14,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:32:14,220 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:32:14,220 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:32:14,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:32:14,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:32:14,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:32:14,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:14,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:32:14,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:32:14,224 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:32:14,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:32:14,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:32:14,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:32:14,225 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_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e28603c63113c1566dc2e06da17c63059f80486 [2021-10-11 02:32:14,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:14,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:14,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:14,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:14,558 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:14,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-memsafety/count_down-alloca-1.i [2021-10-11 02:32:14,634 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/data/2b3c177be/0963f02daedc47a7b3dddb039d4d7eca/FLAGebee7e005 [2021-10-11 02:32:15,202 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:15,203 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/sv-benchmarks/c/array-memsafety/count_down-alloca-1.i [2021-10-11 02:32:15,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/data/2b3c177be/0963f02daedc47a7b3dddb039d4d7eca/FLAGebee7e005 [2021-10-11 02:32:15,657 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/data/2b3c177be/0963f02daedc47a7b3dddb039d4d7eca [2021-10-11 02:32:15,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:15,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:15,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:15,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:15,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:15,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:15" (1/1) ... [2021-10-11 02:32:15,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28636390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:15, skipping insertion in model container [2021-10-11 02:32:15,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:15" (1/1) ... [2021-10-11 02:32:15,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:15,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:16,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:16,070 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:16,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:16,165 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:16,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16 WrapperNode [2021-10-11 02:32:16,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:16,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:16,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:16,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:16,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:16,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:16,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:16,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:16,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... [2021-10-11 02:32:16,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:16,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:16,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:16,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:16,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:32:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:32:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:32:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:32:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:16,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:16,744 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:32:16,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:16 BoogieIcfgContainer [2021-10-11 02:32:16,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:16,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:16,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:16,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:16,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:15" (1/3) ... [2021-10-11 02:32:16,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7e3821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:16, skipping insertion in model container [2021-10-11 02:32:16,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:16" (2/3) ... [2021-10-11 02:32:16,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7e3821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:16, skipping insertion in model container [2021-10-11 02:32:16,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:16" (3/3) ... [2021-10-11 02:32:16,753 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down-alloca-1.i [2021-10-11 02:32:16,766 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:16,769 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2021-10-11 02:32:16,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-11 02:32:16,800 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:16,800 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:32:16,800 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:16,801 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:16,801 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:16,801 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:16,801 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:16,801 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-10-11 02:32:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:32:16,867 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:16,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:32:16,868 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:16,874 INFO L82 PathProgramCache]: Analyzing trace with hash 111923, now seen corresponding path program 1 times [2021-10-11 02:32:16,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:16,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012165507] [2021-10-11 02:32:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:17,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012165507] [2021-10-11 02:32:17,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:17,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632056507] [2021-10-11 02:32:17,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:17,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:17,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:17,110 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2021-10-11 02:32:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:17,167 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-10-11 02:32:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:17,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:32:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:17,177 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:32:17,177 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:32:17,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:32:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:32:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:32:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-11 02:32:17,239 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 3 [2021-10-11 02:32:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:17,240 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-11 02:32:17,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-11 02:32:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:32:17,241 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:17,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:32:17,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:32:17,242 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:17,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash 3471937, now seen corresponding path program 1 times [2021-10-11 02:32:17,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:17,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656931289] [2021-10-11 02:32:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:17,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656931289] [2021-10-11 02:32:17,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:17,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:17,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160093742] [2021-10-11 02:32:17,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:17,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:17,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:17,338 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2021-10-11 02:32:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:17,375 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-11 02:32:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:17,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:32:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:17,377 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:32:17,377 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:32:17,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:17,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:32:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-11 02:32:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:32:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-11 02:32:17,385 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 4 [2021-10-11 02:32:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:17,386 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-11 02:32:17,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-11 02:32:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:32:17,387 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:17,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:32:17,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:32:17,388 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:17,391 INFO L82 PathProgramCache]: Analyzing trace with hash 3471938, now seen corresponding path program 1 times [2021-10-11 02:32:17,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:17,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813174758] [2021-10-11 02:32:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813174758] [2021-10-11 02:32:17,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:17,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:17,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317445687] [2021-10-11 02:32:17,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:17,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:17,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:17,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:17,541 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2021-10-11 02:32:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:17,669 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-10-11 02:32:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:32:17,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2021-10-11 02:32:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:17,672 INFO L225 Difference]: With dead ends: 34 [2021-10-11 02:32:17,672 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:32:17,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:32:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:32:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 18. [2021-10-11 02:32:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:32:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-11 02:32:17,679 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2021-10-11 02:32:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:17,680 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-11 02:32:17,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-11 02:32:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:32:17,680 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:17,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:32:17,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:32:17,681 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:17,681 INFO L82 PathProgramCache]: Analyzing trace with hash 107635795, now seen corresponding path program 1 times [2021-10-11 02:32:17,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:17,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593415939] [2021-10-11 02:32:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:17,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593415939] [2021-10-11 02:32:17,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:17,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:17,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890116326] [2021-10-11 02:32:17,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:32:17,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:17,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:32:17,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:17,738 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2021-10-11 02:32:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:17,756 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-11 02:32:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:17,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-10-11 02:32:17,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:17,757 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:32:17,757 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:32:17,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:32:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-11 02:32:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:32:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-11 02:32:17,761 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 5 [2021-10-11 02:32:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:17,761 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-11 02:32:17,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-11 02:32:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:32:17,762 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:17,762 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-11 02:32:17,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:32:17,763 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:17,763 INFO L82 PathProgramCache]: Analyzing trace with hash -958385061, now seen corresponding path program 1 times [2021-10-11 02:32:17,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:17,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646940322] [2021-10-11 02:32:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:17,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646940322] [2021-10-11 02:32:17,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116609137] [2021-10-11 02:32:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:32:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:18,036 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-11 02:32:18,037 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:32:18,042 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:32:18,043 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:32:18,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-10-11 02:32:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:18,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:18,219 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:32:18,271 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:32:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:18,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1468816633] [2021-10-11 02:32:18,325 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-11 02:32:18,326 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:18,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:18,336 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:18,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:18,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:18,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:18,738 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:19,109 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:19,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:19,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2021-10-11 02:32:19,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170904164] [2021-10-11 02:32:19,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:32:19,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:32:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:32:19,111 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 13 states. [2021-10-11 02:32:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:19,248 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-10-11 02:32:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:32:19,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 6 [2021-10-11 02:32:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:19,249 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:32:19,249 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:32:19,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:32:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:32:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-11 02:32:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:32:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-11 02:32:19,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 6 [2021-10-11 02:32:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:19,252 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-11 02:32:19,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:32:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-11 02:32:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:32:19,253 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:19,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:19,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:19,462 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:19,462 INFO L82 PathProgramCache]: Analyzing trace with hash 354839898, now seen corresponding path program 1 times [2021-10-11 02:32:19,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:19,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059412106] [2021-10-11 02:32:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:19,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059412106] [2021-10-11 02:32:19,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187849757] [2021-10-11 02:32:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:32:19,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:19,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:19,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191839668] [2021-10-11 02:32:19,670 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:32:19,670 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:19,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:19,671 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:19,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:19,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:19,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:19,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:19,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:19,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:19,988 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:20,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:20,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5] total 13 [2021-10-11 02:32:20,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411517753] [2021-10-11 02:32:20,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:32:20,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:32:20,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:32:20,360 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2021-10-11 02:32:20,591 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-10-11 02:32:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:20,756 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-10-11 02:32:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:32:20,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2021-10-11 02:32:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:20,758 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:32:20,758 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:32:20,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:32:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:32:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-11 02:32:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:32:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-10-11 02:32:20,770 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2021-10-11 02:32:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:20,770 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-10-11 02:32:20,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:32:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-10-11 02:32:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:32:20,772 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:20,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:20,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-11 02:32:20,998 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash -893339667, now seen corresponding path program 1 times [2021-10-11 02:32:20,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:20,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109534110] [2021-10-11 02:32:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:32:21,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109534110] [2021-10-11 02:32:21,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:21,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:21,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004623603] [2021-10-11 02:32:21,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:32:21,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:32:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:21,087 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2021-10-11 02:32:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:21,110 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-11 02:32:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:21,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:32:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:21,112 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:32:21,112 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:32:21,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:32:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:32:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:32:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-11 02:32:21,115 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-10-11 02:32:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:21,115 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-11 02:32:21,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-11 02:32:21,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:32:21,116 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:21,116 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:21,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-11 02:32:21,117 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash -893341054, now seen corresponding path program 1 times [2021-10-11 02:32:21,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:21,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930817282] [2021-10-11 02:32:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:21,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930817282] [2021-10-11 02:32:21,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738673651] [2021-10-11 02:32:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:32:21,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:21,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009119862] [2021-10-11 02:32:21,354 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:32:21,354 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:21,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:21,354 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:21,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:21,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:21,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:21,658 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:22,397 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:22,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:22,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-10-11 02:32:22,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111459196] [2021-10-11 02:32:22,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:32:22,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:22,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:32:22,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:32:22,402 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2021-10-11 02:32:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:22,493 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-10-11 02:32:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:32:22,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2021-10-11 02:32:22,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:22,497 INFO L225 Difference]: With dead ends: 29 [2021-10-11 02:32:22,497 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:32:22,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:32:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:32:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-11 02:32:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:32:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-10-11 02:32:22,501 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 11 [2021-10-11 02:32:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:22,501 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-10-11 02:32:22,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:32:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-10-11 02:32:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:32:22,502 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:22,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:22,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:22,710 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1725798985, now seen corresponding path program 2 times [2021-10-11 02:32:22,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:22,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207156286] [2021-10-11 02:32:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:22,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207156286] [2021-10-11 02:32:22,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605549786] [2021-10-11 02:32:22,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:22,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:32:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:32:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:32:22,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:32:23,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248388076] [2021-10-11 02:32:23,127 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:32:23,127 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:23,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:23,128 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:23,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:23,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:23,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:23,361 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:24,210 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:24,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:24,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2021-10-11 02:32:24,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758468297] [2021-10-11 02:32:24,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-10-11 02:32:24,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-11 02:32:24,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:32:24,213 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 17 states. [2021-10-11 02:32:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:24,661 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-10-11 02:32:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:32:24,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-10-11 02:32:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:24,662 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:32:24,662 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:32:24,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2021-10-11 02:32:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:32:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-10-11 02:32:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 02:32:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-11 02:32:24,666 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 13 [2021-10-11 02:32:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:24,666 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-11 02:32:24,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-10-11 02:32:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-11 02:32:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 02:32:24,667 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:24,667 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1] [2021-10-11 02:32:24,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:24,878 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:24,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:24,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1916404094, now seen corresponding path program 3 times [2021-10-11 02:32:24,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:24,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474230106] [2021-10-11 02:32:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:24,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474230106] [2021-10-11 02:32:24,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745405495] [2021-10-11 02:32:24,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:25,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:32:25,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:32:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:32:25,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:32:25,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [210200373] [2021-10-11 02:32:25,183 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:32:25,183 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:25,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:25,184 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:25,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:25,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:25,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:25,439 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:26,205 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:26,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:26,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2021-10-11 02:32:26,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427590145] [2021-10-11 02:32:26,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 02:32:26,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 02:32:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-10-11 02:32:26,207 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 15 states. [2021-10-11 02:32:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:26,346 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-10-11 02:32:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:32:26,346 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2021-10-11 02:32:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:26,347 INFO L225 Difference]: With dead ends: 50 [2021-10-11 02:32:26,347 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:32:26,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-10-11 02:32:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:32:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-10-11 02:32:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 02:32:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-11 02:32:26,351 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 25 [2021-10-11 02:32:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:26,351 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-11 02:32:26,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 02:32:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-11 02:32:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-11 02:32:26,352 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:26,352 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-10-11 02:32:26,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-10-11 02:32:26,566 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1622000119, now seen corresponding path program 4 times [2021-10-11 02:32:26,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:26,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573940485] [2021-10-11 02:32:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:26,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573940485] [2021-10-11 02:32:26,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74881697] [2021-10-11 02:32:26,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:32:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:26,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:26,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501929114] [2021-10-11 02:32:26,907 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:32:26,907 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:26,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:26,908 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:26,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:26,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:27,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:27,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:27,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:27,200 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:27,894 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:27,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:27,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2021-10-11 02:32:27,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246834295] [2021-10-11 02:32:27,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-10-11 02:32:27,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:27,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-11 02:32:27,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:32:27,896 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 17 states. [2021-10-11 02:32:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:28,113 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-10-11 02:32:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:32:28,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2021-10-11 02:32:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:28,115 INFO L225 Difference]: With dead ends: 58 [2021-10-11 02:32:28,115 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:32:28,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:32:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:32:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-10-11 02:32:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 02:32:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-10-11 02:32:28,119 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 27 [2021-10-11 02:32:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:28,119 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-10-11 02:32:28,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-10-11 02:32:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-10-11 02:32:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-11 02:32:28,120 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:28,121 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2021-10-11 02:32:28,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:28,326 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2127345616, now seen corresponding path program 5 times [2021-10-11 02:32:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:28,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610371265] [2021-10-11 02:32:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:28,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610371265] [2021-10-11 02:32:28,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790396057] [2021-10-11 02:32:28,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:28,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:32:28,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:28,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:32:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:32:28,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:32:28,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [165342071] [2021-10-11 02:32:28,893 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:32:28,893 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:28,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:28,893 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:28,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:28,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:28,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:29,129 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:29,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:29,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:29,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 22 [2021-10-11 02:32:29,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261591243] [2021-10-11 02:32:29,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-10-11 02:32:29,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-11 02:32:29,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-10-11 02:32:29,955 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 22 states. [2021-10-11 02:32:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:30,596 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-10-11 02:32:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-11 02:32:30,597 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2021-10-11 02:32:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:30,598 INFO L225 Difference]: With dead ends: 67 [2021-10-11 02:32:30,598 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:32:30,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=389, Invalid=1963, Unknown=0, NotChecked=0, Total=2352 [2021-10-11 02:32:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:32:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:32:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:32:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:32:30,600 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-10-11 02:32:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:30,600 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:32:30,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-10-11 02:32:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:32:30,600 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:32:30,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:30,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:32:30 BoogieIcfgContainer [2021-10-11 02:32:30,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:32:30,830 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:32:30,830 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:32:30,830 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:32:30,831 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:16" (3/4) ... [2021-10-11 02:32:30,833 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:32:30,840 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-11 02:32:30,840 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:32:30,841 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:32:30,879 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17066b33-027d-4850-b9bb-0aec7f22b54d/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:32:30,880 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:32:30,881 INFO L168 Benchmark]: Toolchain (without parser) took 15218.51 ms. Allocated memory was 109.1 MB in the beginning and 272.6 MB in the end (delta: 163.6 MB). Free memory was 66.4 MB in the beginning and 216.3 MB in the end (delta: -149.9 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:30,881 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 109.1 MB. Free memory is still 84.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:30,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 497.43 ms. Allocated memory is still 109.1 MB. Free memory was 66.1 MB in the beginning and 73.4 MB in the end (delta: -7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:30,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.01 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 71.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:30,882 INFO L168 Benchmark]: Boogie Preprocessor took 20.94 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 70.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:30,883 INFO L168 Benchmark]: RCFGBuilder took 498.93 ms. Allocated memory is still 109.1 MB. Free memory was 70.4 MB in the beginning and 46.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:30,883 INFO L168 Benchmark]: TraceAbstraction took 14082.11 ms. Allocated memory was 109.1 MB in the beginning and 272.6 MB in the end (delta: 163.6 MB). Free memory was 45.6 MB in the beginning and 219.2 MB in the end (delta: -173.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:30,883 INFO L168 Benchmark]: Witness Printer took 50.09 ms. Allocated memory is still 272.6 MB. Free memory was 219.2 MB in the beginning and 216.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:30,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 109.1 MB. Free memory is still 84.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 497.43 ms. Allocated memory is still 109.1 MB. Free memory was 66.1 MB in the beginning and 73.4 MB in the end (delta: -7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.01 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 71.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.94 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 70.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 498.93 ms. Allocated memory is still 109.1 MB. Free memory was 70.4 MB in the beginning and 46.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14082.11 ms. Allocated memory was 109.1 MB in the beginning and 272.6 MB in the end (delta: 163.6 MB). Free memory was 45.6 MB in the beginning and 219.2 MB in the end (delta: -173.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 50.09 ms. Allocated memory is still 272.6 MB. Free memory was 219.2 MB in the beginning and 216.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 512]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.0s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 547 SDslu, 227 SDs, 0 SdLazy, 850 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 449 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=11, 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, 12 MinimizatonAttempts, 22 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 263 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 355 ConstructedInterpolants, 0 QuantifiedInterpolants, 50186 SizeOfPredicates, 34 NumberOfNonLiveVariables, 411 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 277/413 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: OVERALL_TIME[ms]: 319, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 5, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 267, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME[ms]: 263, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 109, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 20, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 31, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 4, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME[ms]: 7, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 201, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 201, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 1, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 3, DAG_COMPRESSION_PROCESSED_NODES: 39, DAG_COMPRESSION_RETAINED_NODES: 21, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...