./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH --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 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:43:09,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:43:09,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:43:09,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:43:09,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:43:09,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:43:09,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:43:09,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:43:09,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:43:09,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:43:09,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:43:09,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:43:09,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:43:09,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:43:09,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:43:09,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:43:09,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:43:09,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:43:09,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:43:09,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:43:09,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:43:09,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:43:09,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:43:09,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:43:09,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:43:09,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:43:09,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:43:09,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:43:09,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:43:09,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:43:09,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:43:09,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:43:09,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:43:09,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:43:09,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:43:09,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:43:09,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:43:09,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:43:09,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:43:09,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:43:09,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:43:09,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:43:09,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:43:09,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:43:09,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:43:09,166 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:43:09,166 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:43:09,166 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:43:09,167 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:43:09,167 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:43:09,167 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:43:09,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:43:09,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:43:09,168 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:43:09,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:43:09,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:43:09,168 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:43:09,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:43:09,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:43:09,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:43:09,170 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:43:09,175 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:43:09,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:43:09,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:43:09,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:43:09,176 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:43:09,176 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:43:09,176 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:43:09,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:43:09,177 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:43:09,177 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:43:09,177 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:43:09,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:43:09,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:43:09,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:43:09,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:43:09,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:43:09,178 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:43:09,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:43:09,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:43:09,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:43:09,179 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_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-11-03 05:43:09,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:43:09,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:43:09,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:43:09,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:43:09,494 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:43:09,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-11-03 05:43:09,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data/027a6d02e/cbb93a6e25924b5b8a1be1289f19e418/FLAG399c883ec [2021-11-03 05:43:10,033 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:43:10,033 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-11-03 05:43:10,051 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data/027a6d02e/cbb93a6e25924b5b8a1be1289f19e418/FLAG399c883ec [2021-11-03 05:43:10,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data/027a6d02e/cbb93a6e25924b5b8a1be1289f19e418 [2021-11-03 05:43:10,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:43:10,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:43:10,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:43:10,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:43:10,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:43:10,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac9d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10, skipping insertion in model container [2021-11-03 05:43:10,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:43:10,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:43:10,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:43:10,796 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:43:10,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:43:10,887 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:43:10,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10 WrapperNode [2021-11-03 05:43:10,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:43:10,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:43:10,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:43:10,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:43:10,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:43:10,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:43:10,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:43:10,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:43:10,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:10,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:43:10,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:43:10,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:43:10,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:43:10,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (1/1) ... [2021-11-03 05:43:11,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:43:11,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:43:11,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:43:11,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:43:11,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 05:43:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:43:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:43:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:43:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:43:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:43:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:43:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:43:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:43:11,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:43:11,727 INFO L299 CfgBuilder]: Removed 31 assume(true) statements. [2021-11-03 05:43:11,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:43:11 BoogieIcfgContainer [2021-11-03 05:43:11,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:43:11,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:43:11,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:43:11,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:43:11,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:43:10" (1/3) ... [2021-11-03 05:43:11,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4366ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:43:11, skipping insertion in model container [2021-11-03 05:43:11,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:43:10" (2/3) ... [2021-11-03 05:43:11,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4366ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:43:11, skipping insertion in model container [2021-11-03 05:43:11,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:43:11" (3/3) ... [2021-11-03 05:43:11,738 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-11-03 05:43:11,744 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:43:11,744 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-11-03 05:43:11,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:43:11,796 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:43:11,796 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-11-03 05:43:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:43:11,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:11,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:43:11,821 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash 307842, now seen corresponding path program 1 times [2021-11-03 05:43:11,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:11,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838034025] [2021-11-03 05:43:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:11,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:12,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:12,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838034025] [2021-11-03 05:43:12,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838034025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:12,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:12,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 05:43:12,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120074684] [2021-11-03 05:43:12,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:43:12,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:43:12,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:43:12,074 INFO L87 Difference]: Start difference. First operand has 160 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:12,213 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2021-11-03 05:43:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:43:12,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 05:43:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:12,224 INFO L225 Difference]: With dead ends: 171 [2021-11-03 05:43:12,239 INFO L226 Difference]: Without dead ends: 169 [2021-11-03 05:43:12,241 INFO L786 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 [2021-11-03 05:43:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-03 05:43:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2021-11-03 05:43:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 102 states have (on average 1.8235294117647058) internal successors, (186), 161 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2021-11-03 05:43:12,315 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 3 [2021-11-03 05:43:12,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:12,316 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2021-11-03 05:43:12,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2021-11-03 05:43:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:43:12,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:12,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:43:12,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:43:12,317 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash 307843, now seen corresponding path program 1 times [2021-11-03 05:43:12,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:12,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597677378] [2021-11-03 05:43:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:12,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:12,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:12,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597677378] [2021-11-03 05:43:12,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597677378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:12,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:12,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 05:43:12,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31301146] [2021-11-03 05:43:12,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:43:12,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:43:12,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:43:12,484 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:12,650 INFO L93 Difference]: Finished difference Result 277 states and 312 transitions. [2021-11-03 05:43:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:43:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 05:43:12,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:12,656 INFO L225 Difference]: With dead ends: 277 [2021-11-03 05:43:12,659 INFO L226 Difference]: Without dead ends: 277 [2021-11-03 05:43:12,660 INFO L786 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 [2021-11-03 05:43:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-03 05:43:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 218. [2021-11-03 05:43:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 158 states have (on average 1.7974683544303798) internal successors, (284), 217 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 284 transitions. [2021-11-03 05:43:12,704 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 284 transitions. Word has length 3 [2021-11-03 05:43:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:12,705 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 284 transitions. [2021-11-03 05:43:12,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 284 transitions. [2021-11-03 05:43:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 05:43:12,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:12,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 05:43:12,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:43:12,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:12,707 INFO L85 PathProgramCache]: Analyzing trace with hash 9543085, now seen corresponding path program 1 times [2021-11-03 05:43:12,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:12,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060724868] [2021-11-03 05:43:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:12,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:12,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:13,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060724868] [2021-11-03 05:43:13,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060724868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:13,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:13,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:43:13,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273295585] [2021-11-03 05:43:13,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:43:13,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:43:13,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:43:13,010 INFO L87 Difference]: Start difference. First operand 218 states and 284 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:13,357 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2021-11-03 05:43:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:43:13,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-03 05:43:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:13,364 INFO L225 Difference]: With dead ends: 325 [2021-11-03 05:43:13,364 INFO L226 Difference]: Without dead ends: 325 [2021-11-03 05:43:13,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:43:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-03 05:43:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 242. [2021-11-03 05:43:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 182 states have (on average 1.7637362637362637) internal successors, (321), 241 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2021-11-03 05:43:13,391 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 4 [2021-11-03 05:43:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:13,392 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2021-11-03 05:43:13,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2021-11-03 05:43:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:43:13,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:13,393 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:43:13,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:43:13,393 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash 295835682, now seen corresponding path program 1 times [2021-11-03 05:43:13,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:13,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144151039] [2021-11-03 05:43:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:13,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:13,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:13,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144151039] [2021-11-03 05:43:13,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144151039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:13,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:13,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:43:13,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163656140] [2021-11-03 05:43:13,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:43:13,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:43:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:43:13,594 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:13,814 INFO L93 Difference]: Finished difference Result 297 states and 346 transitions. [2021-11-03 05:43:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:43:13,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 05:43:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:13,817 INFO L225 Difference]: With dead ends: 297 [2021-11-03 05:43:13,817 INFO L226 Difference]: Without dead ends: 297 [2021-11-03 05:43:13,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:43:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-03 05:43:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 242. [2021-11-03 05:43:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 182 states have (on average 1.7472527472527473) internal successors, (318), 241 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 318 transitions. [2021-11-03 05:43:13,835 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 318 transitions. Word has length 5 [2021-11-03 05:43:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:13,835 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 318 transitions. [2021-11-03 05:43:13,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 318 transitions. [2021-11-03 05:43:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:43:13,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:13,837 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:43:13,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:43:13,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash 580971599, now seen corresponding path program 1 times [2021-11-03 05:43:13,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:13,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982969520] [2021-11-03 05:43:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:13,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:13,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:13,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982969520] [2021-11-03 05:43:13,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982969520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:13,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:13,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:43:13,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067247424] [2021-11-03 05:43:13,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:43:13,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:13,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:43:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:43:13,906 INFO L87 Difference]: Start difference. First operand 242 states and 318 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:13,990 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2021-11-03 05:43:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:43:13,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 05:43:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:13,992 INFO L225 Difference]: With dead ends: 263 [2021-11-03 05:43:13,993 INFO L226 Difference]: Without dead ends: 263 [2021-11-03 05:43:13,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:43:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-03 05:43:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 251. [2021-11-03 05:43:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 192 states have (on average 1.7395833333333333) internal successors, (334), 250 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 334 transitions. [2021-11-03 05:43:14,000 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 334 transitions. Word has length 6 [2021-11-03 05:43:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:14,000 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 334 transitions. [2021-11-03 05:43:14,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 334 transitions. [2021-11-03 05:43:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 05:43:14,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:14,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:43:14,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:43:14,002 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 830250436, now seen corresponding path program 1 times [2021-11-03 05:43:14,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:14,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715973463] [2021-11-03 05:43:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:14,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:14,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:14,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715973463] [2021-11-03 05:43:14,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715973463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:14,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:14,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 05:43:14,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759736169] [2021-11-03 05:43:14,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:43:14,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:43:14,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:43:14,105 INFO L87 Difference]: Start difference. First operand 251 states and 334 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:14,162 INFO L93 Difference]: Finished difference Result 253 states and 335 transitions. [2021-11-03 05:43:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:43:14,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 05:43:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:14,164 INFO L225 Difference]: With dead ends: 253 [2021-11-03 05:43:14,164 INFO L226 Difference]: Without dead ends: 253 [2021-11-03 05:43:14,165 INFO L786 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 [2021-11-03 05:43:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-03 05:43:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2021-11-03 05:43:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 192 states have (on average 1.7291666666666667) internal successors, (332), 249 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 332 transitions. [2021-11-03 05:43:14,172 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 332 transitions. Word has length 7 [2021-11-03 05:43:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:14,172 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 332 transitions. [2021-11-03 05:43:14,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 332 transitions. [2021-11-03 05:43:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:43:14,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:14,174 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:43:14,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:43:14,174 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:14,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:14,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1024983254, now seen corresponding path program 1 times [2021-11-03 05:43:14,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:14,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133984154] [2021-11-03 05:43:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:14,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:14,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:14,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133984154] [2021-11-03 05:43:14,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133984154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:43:14,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285720468] [2021-11-03 05:43:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:14,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:43:14,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:43:14,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:43:14,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:43:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:43:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:43:14,556 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-11-03 05:43:14,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 51 [2021-11-03 05:43:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:14,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:43:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:14,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285720468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:43:14,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049196545] [2021-11-03 05:43:14,921 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-03 05:43:14,922 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:43:14,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:43:14,932 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:43:14,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:43:14,982 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:14,987 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:43:14,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:14,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 05:43:14,990 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:43:14,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:14,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:43:15,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 507 [2021-11-03 05:43:15,042 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_55|], 78=[|v_#valid_96|]} [2021-11-03 05:43:15,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:15,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:15,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:15,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:15,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:15,089 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:15,090 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:15,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:15,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:15,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:15,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:15,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:15,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-03 05:43:15,201 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:43:15,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:43:15,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:15,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:15,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:15,405 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-03 05:43:15,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 70 [2021-11-03 05:43:15,410 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:43:15,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:43:15,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:15,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:15,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 403 [2021-11-03 05:43:15,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:43:15,490 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:1853, output treesize:403 [2021-11-03 05:43:15,536 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.4 percent of original size [2021-11-03 05:43:15,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-11-03 05:43:15,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:15,591 INFO L185 QuantifierPusher]: treesize reduction 3, result has 99.3 percent of original size 452 [2021-11-03 05:43:15,613 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.8 percent of original size [2021-11-03 05:43:15,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 514 [2021-11-03 05:43:15,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:15,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:15,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:16,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1107 [2021-11-03 05:43:16,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:16,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1190 [2021-11-03 05:43:16,398 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:16,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1107 [2021-11-03 05:43:16,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:16,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:17,859 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:43:21,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:43:21,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:43:21,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2021-11-03 05:43:21,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893945019] [2021-11-03 05:43:21,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:43:21,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:21,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:43:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:43:21,176 INFO L87 Difference]: Start difference. First operand 250 states and 332 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:21,501 INFO L93 Difference]: Finished difference Result 425 states and 512 transitions. [2021-11-03 05:43:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:43:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 05:43:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:21,504 INFO L225 Difference]: With dead ends: 425 [2021-11-03 05:43:21,504 INFO L226 Difference]: Without dead ends: 425 [2021-11-03 05:43:21,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:43:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-03 05:43:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 302. [2021-11-03 05:43:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 247 states have (on average 1.688259109311741) internal successors, (417), 301 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 417 transitions. [2021-11-03 05:43:21,517 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 417 transitions. Word has length 11 [2021-11-03 05:43:21,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:21,517 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 417 transitions. [2021-11-03 05:43:21,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:21,517 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 417 transitions. [2021-11-03 05:43:21,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 05:43:21,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:21,518 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:43:21,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:43:21,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:43:21,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1709709850, now seen corresponding path program 1 times [2021-11-03 05:43:21,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:21,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866431295] [2021-11-03 05:43:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:21,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:21,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:21,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866431295] [2021-11-03 05:43:21,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866431295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:43:21,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966211045] [2021-11-03 05:43:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:21,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:43:21,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:43:21,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:43:21,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:43:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:22,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:43:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:43:22,231 INFO L354 Elim1Store]: treesize reduction 497, result has 11.1 percent of original size [2021-11-03 05:43:22,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 117 treesize of output 151 [2021-11-03 05:43:30,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2021-11-03 05:43:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:31,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:43:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:31,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966211045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:43:31,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [4899596] [2021-11-03 05:43:31,709 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-03 05:43:31,710 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:43:31,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:43:31,710 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:43:31,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:43:31,738 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,739 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:43:31,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 05:43:31,741 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:43:31,741 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:43:31,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 507 [2021-11-03 05:43:31,759 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_56|], 78=[|v_#valid_98|]} [2021-11-03 05:43:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-03 05:43:31,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:43:31,846 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:43:31,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:31,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:31,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:31,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,865 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:31,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:31,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:31,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:31,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:31,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:31,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:31,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:31,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:31,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:31,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:31,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:31,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:31,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:32,023 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-03 05:43:32,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 70 [2021-11-03 05:43:32,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:32,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:43:32,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:32,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:43:32,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:32,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:32,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:32,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 403 [2021-11-03 05:43:32,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:43:32,067 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:1853, output treesize:403 [2021-11-03 05:43:32,103 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.4 percent of original size [2021-11-03 05:43:32,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-11-03 05:43:32,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:32,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 485 [2021-11-03 05:43:32,158 INFO L180 QuantifierPusher]: treesize reduction 23, result has 95.8 percent of original size [2021-11-03 05:43:32,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 527 [2021-11-03 05:43:32,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:32,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1117 [2021-11-03 05:43:32,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:32,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1197 [2021-11-03 05:43:32,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:32,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1117 [2021-11-03 05:43:32,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:32,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:33,602 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:43:35,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:43:35,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:43:35,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 11 [2021-11-03 05:43:35,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232857916] [2021-11-03 05:43:35,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:43:35,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:43:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-03 05:43:35,557 INFO L87 Difference]: Start difference. First operand 302 states and 417 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:38,570 INFO L93 Difference]: Finished difference Result 768 states and 927 transitions. [2021-11-03 05:43:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:43:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-03 05:43:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:38,576 INFO L225 Difference]: With dead ends: 768 [2021-11-03 05:43:38,576 INFO L226 Difference]: Without dead ends: 768 [2021-11-03 05:43:38,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-11-03 05:43:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-11-03 05:43:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 351. [2021-11-03 05:43:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 297 states have (on average 1.6835016835016836) internal successors, (500), 350 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 500 transitions. [2021-11-03 05:43:38,590 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 500 transitions. Word has length 12 [2021-11-03 05:43:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:38,590 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 500 transitions. [2021-11-03 05:43:38,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 500 transitions. [2021-11-03 05:43:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:43:38,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:38,591 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:43:38,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:43:38,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-03 05:43:38,805 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:38,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1461397751, now seen corresponding path program 1 times [2021-11-03 05:43:38,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:38,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271812300] [2021-11-03 05:43:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:38,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:39,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:39,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271812300] [2021-11-03 05:43:39,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271812300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:43:39,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968224517] [2021-11-03 05:43:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:39,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:43:39,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:43:39,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:43:39,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 05:43:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:39,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 05:43:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:43:39,370 INFO L354 Elim1Store]: treesize reduction 354, result has 14.1 percent of original size [2021-11-03 05:43:39,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 109 [2021-11-03 05:43:39,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:43:39,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 180 [2021-11-03 05:43:50,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 96 [2021-11-03 05:43:50,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 81 [2021-11-03 05:43:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:53,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:43:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:53,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968224517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:43:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893585949] [2021-11-03 05:43:53,895 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-03 05:43:53,896 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:43:53,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:43:53,896 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:43:53,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:43:53,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:53,917 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:43:53,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:53,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 05:43:53,918 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:43:53,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:53,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:43:53,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 507 [2021-11-03 05:43:53,936 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_58|], 78=[|v_#valid_100|]} [2021-11-03 05:43:53,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:53,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:53,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:53,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:53,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:53,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:53,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-03 05:43:54,032 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:43:54,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:43:54,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:54,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:54,046 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:54,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:54,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:54,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:43:54,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:54,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:43:54,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:54,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:54,189 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-03 05:43:54,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 70 [2021-11-03 05:43:54,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:43:54,195 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:43:54,196 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-03 05:43:54,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,220 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 403 [2021-11-03 05:43:54,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:43:54,227 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:1853, output treesize:403 [2021-11-03 05:43:54,258 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.4 percent of original size [2021-11-03 05:43:54,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-11-03 05:43:54,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,288 INFO L185 QuantifierPusher]: treesize reduction 3, result has 99.3 percent of original size 452 [2021-11-03 05:43:54,304 INFO L180 QuantifierPusher]: treesize reduction 6, result has 98.8 percent of original size [2021-11-03 05:43:54,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 514 [2021-11-03 05:43:54,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1107 [2021-11-03 05:43:54,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1190 [2021-11-03 05:43:54,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:43:54,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1107 [2021-11-03 05:43:54,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:54,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:43:55,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:43:58,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:43:58,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:43:58,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2021-11-03 05:43:58,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317059448] [2021-11-03 05:43:58,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:43:58,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:43:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:43:58,418 INFO L87 Difference]: Start difference. First operand 351 states and 500 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:59,434 INFO L93 Difference]: Finished difference Result 753 states and 883 transitions. [2021-11-03 05:43:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:43:59,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:43:59,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:59,439 INFO L225 Difference]: With dead ends: 753 [2021-11-03 05:43:59,439 INFO L226 Difference]: Without dead ends: 753 [2021-11-03 05:43:59,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-11-03 05:43:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-03 05:43:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 350. [2021-11-03 05:43:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 297 states have (on average 1.6734006734006734) internal successors, (497), 349 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 497 transitions. [2021-11-03 05:43:59,453 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 497 transitions. Word has length 13 [2021-11-03 05:43:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:59,454 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 497 transitions. [2021-11-03 05:43:59,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 497 transitions. [2021-11-03 05:43:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 05:43:59,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:59,455 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:43:59,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:43:59,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:43:59,684 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1774633698, now seen corresponding path program 1 times [2021-11-03 05:43:59,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:59,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769572332] [2021-11-03 05:43:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:59,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:59,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:59,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769572332] [2021-11-03 05:43:59,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769572332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:59,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:59,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:43:59,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040084987] [2021-11-03 05:43:59,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:43:59,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:59,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:43:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:43:59,742 INFO L87 Difference]: Start difference. First operand 350 states and 497 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:59,753 INFO L93 Difference]: Finished difference Result 355 states and 486 transitions. [2021-11-03 05:43:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:43:59,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 05:43:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:59,756 INFO L225 Difference]: With dead ends: 355 [2021-11-03 05:43:59,756 INFO L226 Difference]: Without dead ends: 355 [2021-11-03 05:43:59,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:43:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-03 05:43:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 296. [2021-11-03 05:43:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 261 states have (on average 1.6053639846743295) internal successors, (419), 295 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 419 transitions. [2021-11-03 05:43:59,765 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 419 transitions. Word has length 14 [2021-11-03 05:43:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:59,765 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 419 transitions. [2021-11-03 05:43:59,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 419 transitions. [2021-11-03 05:43:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 05:43:59,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:59,767 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:43:59,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-11-03 05:43:59,768 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:59,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1774633954, now seen corresponding path program 1 times [2021-11-03 05:43:59,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:59,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016384051] [2021-11-03 05:43:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:59,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:59,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:59,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016384051] [2021-11-03 05:43:59,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016384051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:59,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:59,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 05:43:59,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821482026] [2021-11-03 05:43:59,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:43:59,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:43:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:43:59,807 INFO L87 Difference]: Start difference. First operand 296 states and 419 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:59,841 INFO L93 Difference]: Finished difference Result 432 states and 616 transitions. [2021-11-03 05:43:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:43:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 05:43:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:59,844 INFO L225 Difference]: With dead ends: 432 [2021-11-03 05:43:59,844 INFO L226 Difference]: Without dead ends: 432 [2021-11-03 05:43:59,845 INFO L786 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 [2021-11-03 05:43:59,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-03 05:43:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 412. [2021-11-03 05:43:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 379 states have (on average 1.6174142480211082) internal successors, (613), 411 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 613 transitions. [2021-11-03 05:43:59,857 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 613 transitions. Word has length 14 [2021-11-03 05:43:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:59,857 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 613 transitions. [2021-11-03 05:43:59,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 613 transitions. [2021-11-03 05:43:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:43:59,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:59,859 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:43:59,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-11-03 05:43:59,859 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:59,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash 820922348, now seen corresponding path program 1 times [2021-11-03 05:43:59,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:59,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568095586] [2021-11-03 05:43:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:59,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:59,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:59,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568095586] [2021-11-03 05:43:59,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568095586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:59,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:59,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 05:43:59,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786833422] [2021-11-03 05:43:59,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:43:59,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:59,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:43:59,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:43:59,892 INFO L87 Difference]: Start difference. First operand 412 states and 613 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:59,956 INFO L93 Difference]: Finished difference Result 465 states and 661 transitions. [2021-11-03 05:43:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:43:59,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:43:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:59,960 INFO L225 Difference]: With dead ends: 465 [2021-11-03 05:43:59,960 INFO L226 Difference]: Without dead ends: 465 [2021-11-03 05:43:59,961 INFO L786 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 [2021-11-03 05:43:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-03 05:43:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 440. [2021-11-03 05:43:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 411 states have (on average 1.5888077858880778) internal successors, (653), 439 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 653 transitions. [2021-11-03 05:43:59,973 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 653 transitions. Word has length 15 [2021-11-03 05:43:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:59,973 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 653 transitions. [2021-11-03 05:43:59,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 653 transitions. [2021-11-03 05:43:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 05:43:59,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:59,976 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:43:59,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-11-03 05:43:59,977 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:43:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash -597902280, now seen corresponding path program 1 times [2021-11-03 05:43:59,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:59,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124005530] [2021-11-03 05:43:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:59,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:00,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:00,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124005530] [2021-11-03 05:44:00,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124005530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:00,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:00,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:44:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166005330] [2021-11-03 05:44:00,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:44:00,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:00,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:44:00,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:44:00,008 INFO L87 Difference]: Start difference. First operand 440 states and 653 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:00,021 INFO L93 Difference]: Finished difference Result 389 states and 530 transitions. [2021-11-03 05:44:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:44:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-03 05:44:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:00,024 INFO L225 Difference]: With dead ends: 389 [2021-11-03 05:44:00,024 INFO L226 Difference]: Without dead ends: 389 [2021-11-03 05:44:00,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:44:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-03 05:44:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 369. [2021-11-03 05:44:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 340 states have (on average 1.55) internal successors, (527), 368 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 527 transitions. [2021-11-03 05:44:00,038 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 527 transitions. Word has length 17 [2021-11-03 05:44:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:00,039 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 527 transitions. [2021-11-03 05:44:00,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,039 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 527 transitions. [2021-11-03 05:44:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 05:44:00,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:00,044 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:00,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-11-03 05:44:00,044 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1763681060, now seen corresponding path program 1 times [2021-11-03 05:44:00,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:00,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959535199] [2021-11-03 05:44:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:00,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:00,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:00,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959535199] [2021-11-03 05:44:00,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959535199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:00,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:00,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:44:00,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99061486] [2021-11-03 05:44:00,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:44:00,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:00,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:44:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:44:00,138 INFO L87 Difference]: Start difference. First operand 369 states and 527 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:00,338 INFO L93 Difference]: Finished difference Result 510 states and 665 transitions. [2021-11-03 05:44:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:44:00,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-03 05:44:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:00,342 INFO L225 Difference]: With dead ends: 510 [2021-11-03 05:44:00,342 INFO L226 Difference]: Without dead ends: 510 [2021-11-03 05:44:00,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:44:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-03 05:44:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 394. [2021-11-03 05:44:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 365 states have (on average 1.4931506849315068) internal successors, (545), 393 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 545 transitions. [2021-11-03 05:44:00,355 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 545 transitions. Word has length 19 [2021-11-03 05:44:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:00,356 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 545 transitions. [2021-11-03 05:44:00,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 545 transitions. [2021-11-03 05:44:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:44:00,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:00,357 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:00,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-11-03 05:44:00,357 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:00,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash -217910675, now seen corresponding path program 1 times [2021-11-03 05:44:00,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:00,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70623865] [2021-11-03 05:44:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:00,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:00,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:00,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70623865] [2021-11-03 05:44:00,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70623865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:00,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:00,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:44:00,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241493478] [2021-11-03 05:44:00,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:44:00,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:00,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:44:00,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:44:00,444 INFO L87 Difference]: Start difference. First operand 394 states and 545 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:00,569 INFO L93 Difference]: Finished difference Result 423 states and 553 transitions. [2021-11-03 05:44:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:44:00,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 05:44:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:00,572 INFO L225 Difference]: With dead ends: 423 [2021-11-03 05:44:00,572 INFO L226 Difference]: Without dead ends: 423 [2021-11-03 05:44:00,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:44:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-03 05:44:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 390. [2021-11-03 05:44:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 362 states have (on average 1.4806629834254144) internal successors, (536), 389 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 536 transitions. [2021-11-03 05:44:00,585 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 536 transitions. Word has length 20 [2021-11-03 05:44:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:00,586 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 536 transitions. [2021-11-03 05:44:00,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 536 transitions. [2021-11-03 05:44:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 05:44:00,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:00,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:00,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-11-03 05:44:00,588 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1834703743, now seen corresponding path program 1 times [2021-11-03 05:44:00,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:00,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437252234] [2021-11-03 05:44:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:00,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:00,687 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:00,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437252234] [2021-11-03 05:44:00,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437252234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:00,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:00,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:44:00,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480075809] [2021-11-03 05:44:00,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:44:00,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:00,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:44:00,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:44:00,690 INFO L87 Difference]: Start difference. First operand 390 states and 536 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:00,831 INFO L93 Difference]: Finished difference Result 363 states and 501 transitions. [2021-11-03 05:44:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:44:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-03 05:44:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:00,834 INFO L225 Difference]: With dead ends: 363 [2021-11-03 05:44:00,834 INFO L226 Difference]: Without dead ends: 363 [2021-11-03 05:44:00,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:44:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-03 05:44:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2021-11-03 05:44:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 335 states have (on average 1.4955223880597015) internal successors, (501), 362 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 501 transitions. [2021-11-03 05:44:00,843 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 501 transitions. Word has length 21 [2021-11-03 05:44:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:00,843 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 501 transitions. [2021-11-03 05:44:00,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 501 transitions. [2021-11-03 05:44:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 05:44:00,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:00,844 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:00,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-11-03 05:44:00,844 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1614584795, now seen corresponding path program 1 times [2021-11-03 05:44:00,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:00,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795934012] [2021-11-03 05:44:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:00,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:01,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:01,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795934012] [2021-11-03 05:44:01,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795934012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:01,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 05:44:01,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109395215] [2021-11-03 05:44:01,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:44:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:44:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:44:01,133 INFO L87 Difference]: Start difference. First operand 363 states and 501 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:01,476 INFO L93 Difference]: Finished difference Result 489 states and 620 transitions. [2021-11-03 05:44:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:44:01,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-03 05:44:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:01,479 INFO L225 Difference]: With dead ends: 489 [2021-11-03 05:44:01,479 INFO L226 Difference]: Without dead ends: 489 [2021-11-03 05:44:01,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:44:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-11-03 05:44:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 349. [2021-11-03 05:44:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 321 states have (on average 1.4548286604361371) internal successors, (467), 348 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 467 transitions. [2021-11-03 05:44:01,489 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 467 transitions. Word has length 21 [2021-11-03 05:44:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:01,489 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 467 transitions. [2021-11-03 05:44:01,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 467 transitions. [2021-11-03 05:44:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 05:44:01,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:01,490 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:01,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-11-03 05:44:01,491 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1487478765, now seen corresponding path program 1 times [2021-11-03 05:44:01,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:01,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372690434] [2021-11-03 05:44:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:01,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:01,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:01,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372690434] [2021-11-03 05:44:01,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372690434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:01,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:01,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:44:01,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854644303] [2021-11-03 05:44:01,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:44:01,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:44:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:44:01,561 INFO L87 Difference]: Start difference. First operand 349 states and 467 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:01,719 INFO L93 Difference]: Finished difference Result 464 states and 594 transitions. [2021-11-03 05:44:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:44:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 05:44:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:01,722 INFO L225 Difference]: With dead ends: 464 [2021-11-03 05:44:01,722 INFO L226 Difference]: Without dead ends: 464 [2021-11-03 05:44:01,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:44:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-03 05:44:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 349. [2021-11-03 05:44:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 321 states have (on average 1.4485981308411215) internal successors, (465), 348 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 465 transitions. [2021-11-03 05:44:01,731 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 465 transitions. Word has length 22 [2021-11-03 05:44:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:01,731 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 465 transitions. [2021-11-03 05:44:01,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 465 transitions. [2021-11-03 05:44:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 05:44:01,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:01,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:01,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-11-03 05:44:01,734 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash 293459520, now seen corresponding path program 1 times [2021-11-03 05:44:01,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:01,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920648087] [2021-11-03 05:44:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:01,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:01,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:01,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920648087] [2021-11-03 05:44:01,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920648087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:01,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:01,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:44:01,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272519559] [2021-11-03 05:44:01,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:44:01,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:44:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:44:01,764 INFO L87 Difference]: Start difference. First operand 349 states and 465 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:01,806 INFO L93 Difference]: Finished difference Result 325 states and 409 transitions. [2021-11-03 05:44:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:44:01,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 05:44:01,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:01,808 INFO L225 Difference]: With dead ends: 325 [2021-11-03 05:44:01,808 INFO L226 Difference]: Without dead ends: 325 [2021-11-03 05:44:01,809 INFO L786 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 [2021-11-03 05:44:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-03 05:44:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 308. [2021-11-03 05:44:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 280 states have (on average 1.4464285714285714) internal successors, (405), 307 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 405 transitions. [2021-11-03 05:44:01,816 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 405 transitions. Word has length 23 [2021-11-03 05:44:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:01,816 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 405 transitions. [2021-11-03 05:44:01,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 405 transitions. [2021-11-03 05:44:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 05:44:01,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:01,823 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:01,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-11-03 05:44:01,823 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1132798685, now seen corresponding path program 1 times [2021-11-03 05:44:01,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:01,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207308496] [2021-11-03 05:44:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:01,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:02,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:02,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207308496] [2021-11-03 05:44:02,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207308496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:02,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:02,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:44:02,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123871740] [2021-11-03 05:44:02,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:44:02,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:44:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:44:02,018 INFO L87 Difference]: Start difference. First operand 308 states and 405 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:02,226 INFO L93 Difference]: Finished difference Result 323 states and 403 transitions. [2021-11-03 05:44:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:44:02,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 05:44:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:02,229 INFO L225 Difference]: With dead ends: 323 [2021-11-03 05:44:02,229 INFO L226 Difference]: Without dead ends: 323 [2021-11-03 05:44:02,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:44:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-03 05:44:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 307. [2021-11-03 05:44:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 280 states have (on average 1.425) internal successors, (399), 306 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 399 transitions. [2021-11-03 05:44:02,236 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 399 transitions. Word has length 23 [2021-11-03 05:44:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:02,236 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 399 transitions. [2021-11-03 05:44:02,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 399 transitions. [2021-11-03 05:44:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:44:02,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:02,237 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:02,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-11-03 05:44:02,238 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:02,238 INFO L85 PathProgramCache]: Analyzing trace with hash -458096893, now seen corresponding path program 1 times [2021-11-03 05:44:02,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:02,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22793073] [2021-11-03 05:44:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:02,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:02,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:02,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22793073] [2021-11-03 05:44:02,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22793073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:44:02,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640302607] [2021-11-03 05:44:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:02,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:44:02,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:44:02,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:44:02,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 05:44:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:44:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:44:02,837 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-11-03 05:44:02,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 76 [2021-11-03 05:44:02,917 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-11-03 05:44:02,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 105 [2021-11-03 05:44:03,282 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-03 05:44:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 51 [2021-11-03 05:44:03,297 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-03 05:44:03,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 56 [2021-11-03 05:44:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:03,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:44:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:03,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640302607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:44:03,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [803520499] [2021-11-03 05:44:03,931 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-03 05:44:03,931 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:44:03,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:44:03,932 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:44:03,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:44:03,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:03,955 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:44:03,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:03,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:44:03,957 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:44:03,957 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:03,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 05:44:03,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 507 [2021-11-03 05:44:03,970 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_62|], 78=[|v_#valid_104|]} [2021-11-03 05:44:03,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:44:03,982 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:03,982 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:44:03,983 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:03,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:44:03,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-03 05:44:04,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:44:04,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:44:04,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:44:04,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,070 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:44:04,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:44:04,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:44:04,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:44:04,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:44:04,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:04,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,206 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-03 05:44:04,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 70 [2021-11-03 05:44:04,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:44:04,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:44:04,212 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:04,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 403 [2021-11-03 05:44:04,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,241 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:1853, output treesize:403 [2021-11-03 05:44:04,281 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.4 percent of original size [2021-11-03 05:44:04,289 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-11-03 05:44:04,307 INFO L180 QuantifierPusher]: treesize reduction 18, result has 96.5 percent of original size [2021-11-03 05:44:04,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 490 [2021-11-03 05:44:04,336 INFO L180 QuantifierPusher]: treesize reduction 18, result has 96.9 percent of original size [2021-11-03 05:44:04,338 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:44:04,338 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,339 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-03 05:44:04,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 555 [2021-11-03 05:44:04,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:44:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:44:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:44:04,482 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-03 05:44:04,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 84 [2021-11-03 05:44:04,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-03 05:44:04,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-03 05:44:04,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:44:04,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:44:04,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:44:04,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:04,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 555 [2021-11-03 05:44:04,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:44:04,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:555 [2021-11-03 05:44:04,580 INFO L180 QuantifierPusher]: treesize reduction 9, result has 98.4 percent of original size [2021-11-03 05:44:04,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 555 [2021-11-03 05:44:04,605 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 549 [2021-11-03 05:44:04,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,642 INFO L185 QuantifierPusher]: treesize reduction 6, result has 98.8 percent of original size 502 [2021-11-03 05:44:04,674 INFO L180 QuantifierPusher]: treesize reduction 9, result has 98.5 percent of original size [2021-11-03 05:44:04,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 582 [2021-11-03 05:44:04,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:04,703 INFO L185 QuantifierPusher]: treesize reduction 10, result has 98.1 percent of original size 529 [2021-11-03 05:44:04,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:04,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:04,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,072 INFO L180 QuantifierPusher]: treesize reduction 13, result has 99.0 percent of original size [2021-11-03 05:44:05,073 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:44:05,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:05,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1147 [2021-11-03 05:44:05,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1271 [2021-11-03 05:44:05,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:05,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1285 [2021-11-03 05:44:05,312 INFO L180 QuantifierPusher]: treesize reduction 13, result has 99.0 percent of original size [2021-11-03 05:44:05,312 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:44:05,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:05,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1147 [2021-11-03 05:44:05,369 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1271 [2021-11-03 05:44:05,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:44:05,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1285 [2021-11-03 05:44:05,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:44:05,938 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:44:18,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:44:18,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:44:18,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2021-11-03 05:44:18,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243663391] [2021-11-03 05:44:18,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 05:44:18,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:44:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 05:44:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-11-03 05:44:18,262 INFO L87 Difference]: Start difference. First operand 307 states and 399 transitions. Second operand has 16 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:19,313 INFO L93 Difference]: Finished difference Result 558 states and 642 transitions. [2021-11-03 05:44:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 05:44:19,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 05:44:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:19,316 INFO L225 Difference]: With dead ends: 558 [2021-11-03 05:44:19,316 INFO L226 Difference]: Without dead ends: 558 [2021-11-03 05:44:19,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=408, Invalid=1662, Unknown=0, NotChecked=0, Total=2070 [2021-11-03 05:44:19,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-03 05:44:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 304. [2021-11-03 05:44:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 283 states have (on average 1.3604240282685511) internal successors, (385), 303 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 385 transitions. [2021-11-03 05:44:19,326 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 385 transitions. Word has length 27 [2021-11-03 05:44:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:19,326 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 385 transitions. [2021-11-03 05:44:19,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 385 transitions. [2021-11-03 05:44:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 05:44:19,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:19,328 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:44:19,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:44:19,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:44:19,555 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:44:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2144448446, now seen corresponding path program 1 times [2021-11-03 05:44:19,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:19,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606999027] [2021-11-03 05:44:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:19,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:20,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:44:20,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606999027] [2021-11-03 05:44:20,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606999027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:44:20,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565670517] [2021-11-03 05:44:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:20,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:44:20,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:44:20,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:44:20,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 05:44:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:20,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 05:44:20,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:44:20,382 INFO L354 Elim1Store]: treesize reduction 354, result has 14.1 percent of original size [2021-11-03 05:44:20,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 89 [2021-11-03 05:44:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 120 [2021-11-03 05:44:27,403 INFO L354 Elim1Store]: treesize reduction 200, result has 30.8 percent of original size [2021-11-03 05:44:27,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 171 [2021-11-03 05:45:00,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 114 [2021-11-03 05:45:00,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 99 [2021-11-03 05:45:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:04,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:06,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565670517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:06,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [418849159] [2021-11-03 05:45:06,663 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-03 05:45:06,663 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:45:06,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:45:06,664 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:45:06,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:45:06,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,682 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:06,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:45:06,683 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:06,684 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 05:45:06,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 507 [2021-11-03 05:45:06,697 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_67|], 78=[|v_#valid_108|]} [2021-11-03 05:45:06,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-03 05:45:06,781 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:45:06,782 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:45:06,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:06,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:06,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:06,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,797 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:06,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:06,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:06,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:06,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:06,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:06,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:06,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:06,824 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:06,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:06,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:06,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:06,961 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-03 05:45:06,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 70 [2021-11-03 05:45:06,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:06,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:06,966 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:06,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:06,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,986 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:06,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 403 [2021-11-03 05:45:06,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:45:06,990 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:1853, output treesize:403 [2021-11-03 05:45:07,017 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.4 percent of original size [2021-11-03 05:45:07,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-11-03 05:45:07,033 INFO L180 QuantifierPusher]: treesize reduction 18, result has 96.5 percent of original size [2021-11-03 05:45:07,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 490 [2021-11-03 05:45:07,050 INFO L180 QuantifierPusher]: treesize reduction 18, result has 96.9 percent of original size [2021-11-03 05:45:07,050 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:07,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-03 05:45:07,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 555 [2021-11-03 05:45:07,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:45:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:07,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:45:07,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:45:07,176 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-03 05:45:07,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 84 [2021-11-03 05:45:07,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-03 05:45:07,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,180 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-03 05:45:07,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:07,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:07,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:07,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:07,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:07,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:07,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,237 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 540 [2021-11-03 05:45:07,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:45:07,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:540 [2021-11-03 05:45:07,284 INFO L180 QuantifierPusher]: treesize reduction 9, result has 98.4 percent of original size [2021-11-03 05:45:07,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 540 [2021-11-03 05:45:07,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,320 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 534 [2021-11-03 05:45:07,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,347 INFO L185 QuantifierPusher]: treesize reduction 12, result has 97.6 percent of original size 484 [2021-11-03 05:45:07,377 INFO L180 QuantifierPusher]: treesize reduction 15, result has 97.4 percent of original size [2021-11-03 05:45:07,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 564 [2021-11-03 05:45:07,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 571 [2021-11-03 05:45:07,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:07,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:07,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:07,720 INFO L180 QuantifierPusher]: treesize reduction 30, result has 97.7 percent of original size [2021-11-03 05:45:07,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1275 [2021-11-03 05:45:07,765 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1289 [2021-11-03 05:45:07,878 INFO L180 QuantifierPusher]: treesize reduction 30, result has 97.7 percent of original size [2021-11-03 05:45:07,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1275 [2021-11-03 05:45:07,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:07,931 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1289 [2021-11-03 05:45:07,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:08,213 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:45:24,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:24,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:45:24,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2021-11-03 05:45:24,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455927030] [2021-11-03 05:45:24,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 05:45:24,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:24,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 05:45:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=897, Unknown=1, NotChecked=0, Total=1122 [2021-11-03 05:45:24,725 INFO L87 Difference]: Start difference. First operand 304 states and 385 transitions. Second operand has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:30,707 INFO L93 Difference]: Finished difference Result 413 states and 486 transitions. [2021-11-03 05:45:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:45:30,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-03 05:45:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:30,710 INFO L225 Difference]: With dead ends: 413 [2021-11-03 05:45:30,710 INFO L226 Difference]: Without dead ends: 413 [2021-11-03 05:45:30,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=384, Invalid=1685, Unknown=1, NotChecked=0, Total=2070 [2021-11-03 05:45:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-03 05:45:30,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 257. [2021-11-03 05:45:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 238 states have (on average 1.3319327731092436) internal successors, (317), 256 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 317 transitions. [2021-11-03 05:45:30,718 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 317 transitions. Word has length 29 [2021-11-03 05:45:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:30,718 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 317 transitions. [2021-11-03 05:45:30,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 317 transitions. [2021-11-03 05:45:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 05:45:30,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:30,719 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:30,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-03 05:45:30,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-11-03 05:45:30,936 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash 480865382, now seen corresponding path program 1 times [2021-11-03 05:45:30,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:30,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31034989] [2021-11-03 05:45:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:30,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:31,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:31,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31034989] [2021-11-03 05:45:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31034989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:45:31,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079418821] [2021-11-03 05:45:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:31,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:31,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:31,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 05:45:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 05:45:31,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:31,979 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:45:31,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-11-03 05:45:32,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 05:45:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:45:32,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:32,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-11-03 05:45:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:45:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079418821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:32,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1490999328] [2021-11-03 05:45:32,313 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-03 05:45:32,313 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:45:32,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:45:32,314 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:45:32,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:45:32,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,326 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:32,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 05:45:32,327 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:32,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:45:32,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 507 [2021-11-03 05:45:32,340 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_69|], 78=[|v_#valid_112|]} [2021-11-03 05:45:32,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:32,352 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:32,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:32,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:32,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:32,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,364 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:32,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:32,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:32,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:32,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:32,375 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:32,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:32,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-03 05:45:32,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:45:32,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:45:32,417 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:32,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:32,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:32,529 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-03 05:45:32,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 70 [2021-11-03 05:45:32,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:32,535 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,536 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:32,536 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:32,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:32,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 403 [2021-11-03 05:45:32,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:45:32,564 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:1853, output treesize:403 [2021-11-03 05:45:32,593 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.4 percent of original size [2021-11-03 05:45:32,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-11-03 05:45:32,602 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,607 INFO L185 QuantifierPusher]: treesize reduction 3, result has 99.3 percent of original size 452 [2021-11-03 05:45:32,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:32,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:32,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:32,810 INFO L180 QuantifierPusher]: treesize reduction 6, result has 99.4 percent of original size [2021-11-03 05:45:32,812 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:32,825 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 966 [2021-11-03 05:45:32,870 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1090 [2021-11-03 05:45:32,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:32,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1104 [2021-11-03 05:45:33,001 INFO L180 QuantifierPusher]: treesize reduction 6, result has 99.4 percent of original size [2021-11-03 05:45:33,002 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:33,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,020 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 966 [2021-11-03 05:45:33,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1090 [2021-11-03 05:45:33,061 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1104 [2021-11-03 05:45:33,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:33,562 INFO L180 QuantifierPusher]: treesize reduction 6, result has 99.4 percent of original size [2021-11-03 05:45:33,563 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:33,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 966 [2021-11-03 05:45:33,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1090 [2021-11-03 05:45:33,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:33,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1125 [2021-11-03 05:45:33,659 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:45:42,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1490999328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:42,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:45:42,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 6, 6] total 27 [2021-11-03 05:45:42,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924397207] [2021-11-03 05:45:42,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 05:45:42,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 05:45:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-11-03 05:45:42,932 INFO L87 Difference]: Start difference. First operand 257 states and 317 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:44,813 INFO L93 Difference]: Finished difference Result 286 states and 346 transitions. [2021-11-03 05:45:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:45:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-03 05:45:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:44,815 INFO L225 Difference]: With dead ends: 286 [2021-11-03 05:45:44,815 INFO L226 Difference]: Without dead ends: 286 [2021-11-03 05:45:44,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:45:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-03 05:45:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 243. [2021-11-03 05:45:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 225 states have (on average 1.3333333333333333) internal successors, (300), 242 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 300 transitions. [2021-11-03 05:45:44,821 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 300 transitions. Word has length 29 [2021-11-03 05:45:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:44,822 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 300 transitions. [2021-11-03 05:45:44,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 300 transitions. [2021-11-03 05:45:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 05:45:44,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:44,823 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:44,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-03 05:45:45,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:45,037 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1477169280, now seen corresponding path program 1 times [2021-11-03 05:45:45,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:45,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119955580] [2021-11-03 05:45:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:45,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:45,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:45,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119955580] [2021-11-03 05:45:45,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119955580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:45,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:45,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:45:45,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303025220] [2021-11-03 05:45:45,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:45:45,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:45:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:45,077 INFO L87 Difference]: Start difference. First operand 243 states and 300 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:45,113 INFO L93 Difference]: Finished difference Result 246 states and 299 transitions. [2021-11-03 05:45:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:45:45,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-03 05:45:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:45,115 INFO L225 Difference]: With dead ends: 246 [2021-11-03 05:45:45,115 INFO L226 Difference]: Without dead ends: 246 [2021-11-03 05:45:45,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:45:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-03 05:45:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 209. [2021-11-03 05:45:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 195 states have (on average 1.2974358974358975) internal successors, (253), 208 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 253 transitions. [2021-11-03 05:45:45,121 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 253 transitions. Word has length 30 [2021-11-03 05:45:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:45,121 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 253 transitions. [2021-11-03 05:45:45,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 253 transitions. [2021-11-03 05:45:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 05:45:45,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:45,122 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:45,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-11-03 05:45:45,122 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash 576600698, now seen corresponding path program 1 times [2021-11-03 05:45:45,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:45,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133120109] [2021-11-03 05:45:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:45,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:45,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:45,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133120109] [2021-11-03 05:45:45,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133120109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:45:45,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851973798] [2021-11-03 05:45:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:45,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:45,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:45,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:45,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 05:45:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:45,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:45:45,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:45,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-03 05:45:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:45,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:46,038 INFO L354 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2021-11-03 05:45:46,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-11-03 05:45:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:46,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851973798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:46,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951088031] [2021-11-03 05:45:46,088 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-03 05:45:46,088 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:45:46,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:45:46,089 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:45:46,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:45:46,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,103 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:46,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:45:46,104 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:46,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 05:45:46,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 507 [2021-11-03 05:45:46,118 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_70|], 78=[|v_#valid_113|]} [2021-11-03 05:45:46,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:46,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:46,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:46,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:46,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:46,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:46,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:46,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-03 05:45:46,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:45:46,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:45:46,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:46,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:45:46,228 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,228 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:46,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,229 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:45:46,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:46,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:45:46,353 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-03 05:45:46,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 70 [2021-11-03 05:45:46,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:46,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,360 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:45:46,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-03 05:45:46,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 403 [2021-11-03 05:45:46,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:45:46,393 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:1853, output treesize:403 [2021-11-03 05:45:46,425 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.4 percent of original size [2021-11-03 05:45:46,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-11-03 05:45:46,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 485 [2021-11-03 05:45:46,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,615 INFO L180 QuantifierPusher]: treesize reduction 24, result has 97.8 percent of original size [2021-11-03 05:45:46,617 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:46,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 979 [2021-11-03 05:45:46,686 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1103 [2021-11-03 05:45:46,696 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,710 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1117 [2021-11-03 05:45:46,775 INFO L180 QuantifierPusher]: treesize reduction 24, result has 97.8 percent of original size [2021-11-03 05:45:46,777 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:45:46,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 979 [2021-11-03 05:45:46,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1103 [2021-11-03 05:45:46,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:46,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1117 [2021-11-03 05:45:46,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:46,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,008 INFO L180 QuantifierPusher]: treesize reduction 64, result has 59.0 percent of original size [2021-11-03 05:45:47,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-11-03 05:45:47,017 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-03 05:45:47,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 147 [2021-11-03 05:45:47,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:47,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 154 [2021-11-03 05:45:47,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,071 INFO L180 QuantifierPusher]: treesize reduction 24, result has 94.4 percent of original size [2021-11-03 05:45:47,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 417 [2021-11-03 05:45:47,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:47,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 431 [2021-11-03 05:45:47,111 INFO L180 QuantifierPusher]: treesize reduction 24, result has 94.4 percent of original size [2021-11-03 05:45:47,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 417 [2021-11-03 05:45:47,125 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:47,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 431 [2021-11-03 05:45:47,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:45:47,581 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:45:53,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:45:53,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:45:53,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2021-11-03 05:45:53,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579462120] [2021-11-03 05:45:53,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-03 05:45:53,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:53,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-03 05:45:53,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:45:53,499 INFO L87 Difference]: Start difference. First operand 209 states and 253 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:53,993 INFO L93 Difference]: Finished difference Result 398 states and 458 transitions. [2021-11-03 05:45:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:45:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-03 05:45:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:53,996 INFO L225 Difference]: With dead ends: 398 [2021-11-03 05:45:53,997 INFO L226 Difference]: Without dead ends: 398 [2021-11-03 05:45:53,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:45:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-03 05:45:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 204. [2021-11-03 05:45:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 191 states have (on average 1.2984293193717278) internal successors, (248), 203 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 248 transitions. [2021-11-03 05:45:54,004 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 248 transitions. Word has length 30 [2021-11-03 05:45:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:54,004 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 248 transitions. [2021-11-03 05:45:54,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 248 transitions. [2021-11-03 05:45:54,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-03 05:45:54,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:54,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:54,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:54,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-11-03 05:45:54,230 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1452392743, now seen corresponding path program 1 times [2021-11-03 05:45:54,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:54,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451440947] [2021-11-03 05:45:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:54,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:54,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:54,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451440947] [2021-11-03 05:45:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451440947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:54,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:54,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:45:54,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789889830] [2021-11-03 05:45:54,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:45:54,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:45:54,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:54,284 INFO L87 Difference]: Start difference. First operand 204 states and 248 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:54,333 INFO L93 Difference]: Finished difference Result 207 states and 247 transitions. [2021-11-03 05:45:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:45:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-03 05:45:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:54,334 INFO L225 Difference]: With dead ends: 207 [2021-11-03 05:45:54,334 INFO L226 Difference]: Without dead ends: 207 [2021-11-03 05:45:54,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:45:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-03 05:45:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2021-11-03 05:45:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 191 states have (on average 1.2774869109947644) internal successors, (244), 199 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2021-11-03 05:45:54,339 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 31 [2021-11-03 05:45:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:54,340 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2021-11-03 05:45:54,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2021-11-03 05:45:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 05:45:54,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:54,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:54,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2021-11-03 05:45:54,342 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2074502242, now seen corresponding path program 1 times [2021-11-03 05:45:54,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:54,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838235909] [2021-11-03 05:45:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:54,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:54,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:54,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838235909] [2021-11-03 05:45:54,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838235909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:54,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:54,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:45:54,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581524757] [2021-11-03 05:45:54,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:45:54,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:45:54,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:54,383 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:54,478 INFO L93 Difference]: Finished difference Result 228 states and 275 transitions. [2021-11-03 05:45:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:45:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-03 05:45:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:54,480 INFO L225 Difference]: With dead ends: 228 [2021-11-03 05:45:54,480 INFO L226 Difference]: Without dead ends: 228 [2021-11-03 05:45:54,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:45:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-03 05:45:54,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 215. [2021-11-03 05:45:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 208 states have (on average 1.2740384615384615) internal successors, (265), 214 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 265 transitions. [2021-11-03 05:45:54,487 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 265 transitions. Word has length 32 [2021-11-03 05:45:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:54,488 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 265 transitions. [2021-11-03 05:45:54,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 265 transitions. [2021-11-03 05:45:54,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:45:54,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:54,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:54,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2021-11-03 05:45:54,490 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:54,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:54,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1080344785, now seen corresponding path program 1 times [2021-11-03 05:45:54,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:54,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919792959] [2021-11-03 05:45:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:54,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:54,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:54,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919792959] [2021-11-03 05:45:54,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919792959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:54,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:54,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:45:54,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015787443] [2021-11-03 05:45:54,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:45:54,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:45:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:45:54,563 INFO L87 Difference]: Start difference. First operand 215 states and 265 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:54,647 INFO L93 Difference]: Finished difference Result 225 states and 271 transitions. [2021-11-03 05:45:54,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:45:54,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:45:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:54,649 INFO L225 Difference]: With dead ends: 225 [2021-11-03 05:45:54,649 INFO L226 Difference]: Without dead ends: 225 [2021-11-03 05:45:54,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:45:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-03 05:45:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 214. [2021-11-03 05:45:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.2692307692307692) internal successors, (264), 213 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 264 transitions. [2021-11-03 05:45:54,654 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 264 transitions. Word has length 36 [2021-11-03 05:45:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:54,654 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 264 transitions. [2021-11-03 05:45:54,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 264 transitions. [2021-11-03 05:45:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 05:45:54,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:54,656 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:54,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2021-11-03 05:45:54,656 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash 869050202, now seen corresponding path program 1 times [2021-11-03 05:45:54,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:54,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673338214] [2021-11-03 05:45:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:54,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:55,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:55,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673338214] [2021-11-03 05:45:55,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673338214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:55,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:55,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-03 05:45:55,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229502355] [2021-11-03 05:45:55,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-03 05:45:55,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-03 05:45:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-03 05:45:55,112 INFO L87 Difference]: Start difference. First operand 214 states and 264 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:55,472 INFO L93 Difference]: Finished difference Result 302 states and 350 transitions. [2021-11-03 05:45:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:45:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-03 05:45:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:55,474 INFO L225 Difference]: With dead ends: 302 [2021-11-03 05:45:55,474 INFO L226 Difference]: Without dead ends: 302 [2021-11-03 05:45:55,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-11-03 05:45:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-03 05:45:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 214. [2021-11-03 05:45:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.2596153846153846) internal successors, (262), 213 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2021-11-03 05:45:55,479 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 37 [2021-11-03 05:45:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:55,479 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2021-11-03 05:45:55,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,480 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2021-11-03 05:45:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 05:45:55,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:55,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:55,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2021-11-03 05:45:55,481 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1357967371, now seen corresponding path program 1 times [2021-11-03 05:45:55,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:55,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787732770] [2021-11-03 05:45:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:55,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:55,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:55,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787732770] [2021-11-03 05:45:55,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787732770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:55,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:55,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:45:55,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86533766] [2021-11-03 05:45:55,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:45:55,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:55,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:45:55,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:45:55,515 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:55,562 INFO L93 Difference]: Finished difference Result 226 states and 267 transitions. [2021-11-03 05:45:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:45:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-03 05:45:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:55,564 INFO L225 Difference]: With dead ends: 226 [2021-11-03 05:45:55,564 INFO L226 Difference]: Without dead ends: 226 [2021-11-03 05:45:55,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:45:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-03 05:45:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 214. [2021-11-03 05:45:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.2451923076923077) internal successors, (259), 213 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 259 transitions. [2021-11-03 05:45:55,569 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 259 transitions. Word has length 38 [2021-11-03 05:45:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:55,570 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 259 transitions. [2021-11-03 05:45:55,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 259 transitions. [2021-11-03 05:45:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 05:45:55,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:55,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:55,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2021-11-03 05:45:55,571 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:55,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1933596156, now seen corresponding path program 1 times [2021-11-03 05:45:55,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:55,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967135081] [2021-11-03 05:45:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:55,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:55,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:55,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967135081] [2021-11-03 05:45:55,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967135081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:55,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:55,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 05:45:55,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25927577] [2021-11-03 05:45:55,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:45:55,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:45:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:45:55,678 INFO L87 Difference]: Start difference. First operand 214 states and 259 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:55,921 INFO L93 Difference]: Finished difference Result 231 states and 268 transitions. [2021-11-03 05:45:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:45:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-03 05:45:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:55,922 INFO L225 Difference]: With dead ends: 231 [2021-11-03 05:45:55,923 INFO L226 Difference]: Without dead ends: 231 [2021-11-03 05:45:55,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:45:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-03 05:45:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 213. [2021-11-03 05:45:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.2259615384615385) internal successors, (255), 212 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 255 transitions. [2021-11-03 05:45:55,927 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 255 transitions. Word has length 39 [2021-11-03 05:45:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:55,927 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 255 transitions. [2021-11-03 05:45:55,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 255 transitions. [2021-11-03 05:45:55,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:45:55,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:55,928 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:55,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2021-11-03 05:45:55,928 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:55,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:55,928 INFO L85 PathProgramCache]: Analyzing trace with hash -188061071, now seen corresponding path program 1 times [2021-11-03 05:45:55,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:55,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357203263] [2021-11-03 05:45:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:55,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:56,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:56,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357203263] [2021-11-03 05:45:56,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357203263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:56,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:56,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 05:45:56,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594237828] [2021-11-03 05:45:56,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:45:56,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:56,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:45:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:45:56,075 INFO L87 Difference]: Start difference. First operand 213 states and 255 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:56,331 INFO L93 Difference]: Finished difference Result 269 states and 308 transitions. [2021-11-03 05:45:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:45:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 05:45:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:56,332 INFO L225 Difference]: With dead ends: 269 [2021-11-03 05:45:56,333 INFO L226 Difference]: Without dead ends: 269 [2021-11-03 05:45:56,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:45:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-03 05:45:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 238. [2021-11-03 05:45:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.2145922746781115) internal successors, (283), 237 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 283 transitions. [2021-11-03 05:45:56,338 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 283 transitions. Word has length 40 [2021-11-03 05:45:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:56,338 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 283 transitions. [2021-11-03 05:45:56,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 283 transitions. [2021-11-03 05:45:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 05:45:56,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:56,339 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:56,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2021-11-03 05:45:56,339 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:56,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash 166686018, now seen corresponding path program 1 times [2021-11-03 05:45:56,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:56,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282705359] [2021-11-03 05:45:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:56,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:45:56,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:56,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282705359] [2021-11-03 05:45:56,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282705359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:56,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:56,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:45:56,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218170670] [2021-11-03 05:45:56,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:45:56,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:45:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:45:56,445 INFO L87 Difference]: Start difference. First operand 238 states and 283 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:56,578 INFO L93 Difference]: Finished difference Result 250 states and 289 transitions. [2021-11-03 05:45:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:45:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 05:45:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:56,580 INFO L225 Difference]: With dead ends: 250 [2021-11-03 05:45:56,580 INFO L226 Difference]: Without dead ends: 250 [2021-11-03 05:45:56,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:45:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-03 05:45:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 212. [2021-11-03 05:45:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.1923076923076923) internal successors, (248), 211 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 248 transitions. [2021-11-03 05:45:56,585 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 248 transitions. Word has length 41 [2021-11-03 05:45:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:56,586 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 248 transitions. [2021-11-03 05:45:56,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 248 transitions. [2021-11-03 05:45:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 05:45:56,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:56,587 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:56,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2021-11-03 05:45:56,589 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:56,589 INFO L85 PathProgramCache]: Analyzing trace with hash 760508307, now seen corresponding path program 1 times [2021-11-03 05:45:56,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:56,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572224880] [2021-11-03 05:45:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:56,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:45:56,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:56,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572224880] [2021-11-03 05:45:56,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572224880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:56,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:45:56,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:45:56,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002876264] [2021-11-03 05:45:56,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:45:56,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:45:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:45:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:45:56,699 INFO L87 Difference]: Start difference. First operand 212 states and 248 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:56,794 INFO L93 Difference]: Finished difference Result 336 states and 385 transitions. [2021-11-03 05:45:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:45:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 05:45:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:56,796 INFO L225 Difference]: With dead ends: 336 [2021-11-03 05:45:56,796 INFO L226 Difference]: Without dead ends: 336 [2021-11-03 05:45:56,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:45:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-03 05:45:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 222. [2021-11-03 05:45:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 218 states have (on average 1.18348623853211) internal successors, (258), 221 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 258 transitions. [2021-11-03 05:45:56,801 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 258 transitions. Word has length 45 [2021-11-03 05:45:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:56,801 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 258 transitions. [2021-11-03 05:45:56,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:45:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 258 transitions. [2021-11-03 05:45:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-03 05:45:56,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:56,802 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:56,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2021-11-03 05:45:56,803 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:45:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1949448756, now seen corresponding path program 1 times [2021-11-03 05:45:56,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:45:56,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664801826] [2021-11-03 05:45:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:56,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:45:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:45:57,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:45:57,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664801826] [2021-11-03 05:45:57,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664801826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:45:57,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365161292] [2021-11-03 05:45:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:57,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:45:57,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:45:57,175 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:45:57,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 05:45:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 05:45:57,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:57,891 INFO L354 Elim1Store]: treesize reduction 505, result has 10.9 percent of original size [2021-11-03 05:45:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 160 treesize of output 192 [2021-11-03 05:46:08,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:46:08,892 INFO L354 Elim1Store]: treesize reduction 244, result has 23.5 percent of original size [2021-11-03 05:46:08,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 109 treesize of output 173 [2021-11-03 05:46:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:46:28,633 INFO L354 Elim1Store]: treesize reduction 316, result has 26.3 percent of original size [2021-11-03 05:46:28,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 117 treesize of output 206 [2021-11-03 05:46:36,040 INFO L354 Elim1Store]: treesize reduction 362, result has 14.6 percent of original size [2021-11-03 05:46:36,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 129 treesize of output 167 [2021-11-03 05:48:54,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 116 [2021-11-03 05:49:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:01,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:49:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365161292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:02,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1387006390] [2021-11-03 05:49:02,399 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2021-11-03 05:49:02,399 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:49:02,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:49:02,400 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:49:02,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:49:02,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,423 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:02,424 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-11-03 05:49:02,425 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:02,425 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,426 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:49:02,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 507 [2021-11-03 05:49:02,437 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_73|], 78=[|v_#valid_121|]} [2021-11-03 05:49:02,457 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:49:02,457 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:02,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:02,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:49:02,469 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,470 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:02,470 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,470 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:02,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-03 05:49:02,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:49:02,544 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-03 05:49:02,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:49:02,552 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:02,553 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:02,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:02,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,647 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-03 05:49:02,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 70 [2021-11-03 05:49:02,648 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:49:02,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-03 05:49:02,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:02,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,677 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 403 [2021-11-03 05:49:02,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,684 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:1853, output treesize:403 [2021-11-03 05:49:02,721 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.4 percent of original size [2021-11-03 05:49:02,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 478 [2021-11-03 05:49:02,737 INFO L180 QuantifierPusher]: treesize reduction 18, result has 96.5 percent of original size [2021-11-03 05:49:02,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 490 [2021-11-03 05:49:02,756 INFO L180 QuantifierPusher]: treesize reduction 18, result has 96.9 percent of original size [2021-11-03 05:49:02,758 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:02,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-11-03 05:49:02,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 555 [2021-11-03 05:49:02,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:02,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:02,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:02,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:02,891 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-03 05:49:02,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 84 [2021-11-03 05:49:02,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-03 05:49:02,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-03 05:49:02,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:49:02,907 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:02,907 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:02,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:02,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:02,948 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 552 [2021-11-03 05:49:02,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:49:02,950 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:552 [2021-11-03 05:49:02,985 INFO L180 QuantifierPusher]: treesize reduction 9, result has 98.4 percent of original size [2021-11-03 05:49:02,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 552 [2021-11-03 05:49:03,010 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 546 [2021-11-03 05:49:03,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,045 INFO L185 QuantifierPusher]: treesize reduction 9, result has 98.2 percent of original size 495 [2021-11-03 05:49:03,096 INFO L180 QuantifierPusher]: treesize reduction 12, result has 97.9 percent of original size [2021-11-03 05:49:03,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 575 [2021-11-03 05:49:03,130 INFO L180 QuantifierPusher]: treesize reduction 18, result has 97.0 percent of original size [2021-11-03 05:49:03,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 587 [2021-11-03 05:49:03,158 INFO L180 QuantifierPusher]: treesize reduction 18, result has 97.2 percent of original size [2021-11-03 05:49:03,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 605 [2021-11-03 05:49:03,186 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,189 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-03 05:49:03,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 646 [2021-11-03 05:49:03,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:03,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:49:03,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:03,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:49:03,310 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-03 05:49:03,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 100 treesize of output 102 [2021-11-03 05:49:03,312 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-03 05:49:03,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-03 05:49:03,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:03,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:49:03,334 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:03,334 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,335 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:49:03,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:49:03,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:03,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,370 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.5 percent of original size [2021-11-03 05:49:03,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 616 [2021-11-03 05:49:03,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:49:03,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:1279, output treesize:616 [2021-11-03 05:49:03,415 INFO L180 QuantifierPusher]: treesize reduction 22, result has 96.6 percent of original size [2021-11-03 05:49:03,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 630 [2021-11-03 05:49:03,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,433 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,434 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-03 05:49:03,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 635 [2021-11-03 05:49:03,456 INFO L180 QuantifierPusher]: treesize reduction 1, result has 99.8 percent of original size [2021-11-03 05:49:03,457 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-03 05:49:03,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 629 [2021-11-03 05:49:03,475 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,478 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,485 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-03 05:49:03,491 INFO L185 QuantifierPusher]: treesize reduction 12, result has 97.9 percent of original size 570 [2021-11-03 05:49:03,518 INFO L180 QuantifierPusher]: treesize reduction 12, result has 98.2 percent of original size [2021-11-03 05:49:03,519 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,520 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,521 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-03 05:49:03,533 INFO L185 QuantifierPusher]: treesize reduction 3, result has 99.5 percent of original size 650 [2021-11-03 05:49:03,559 INFO L180 QuantifierPusher]: treesize reduction 3, result has 99.5 percent of original size [2021-11-03 05:49:03,560 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-03 05:49:03,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 657 [2021-11-03 05:49:03,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:03,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:03,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:03,635 INFO L180 QuantifierPusher]: treesize reduction 14, result has 98.9 percent of original size [2021-11-03 05:49:03,637 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,638 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-03 05:49:03,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1310 [2021-11-03 05:49:03,688 INFO L180 QuantifierPusher]: treesize reduction 24, result has 98.3 percent of original size [2021-11-03 05:49:03,711 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,712 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-03 05:49:03,712 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:49:03,713 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-03 05:49:03,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1364 [2021-11-03 05:49:03,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:03,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:03,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:49:03,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-03 05:49:03,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-03 05:49:03,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:03,765 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-03 05:49:03,767 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:49:30,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:49:30,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:49:30,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 29 [2021-11-03 05:49:30,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138356798] [2021-11-03 05:49:30,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-03 05:49:30,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:49:30,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-03 05:49:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=2294, Unknown=0, NotChecked=0, Total=2862 [2021-11-03 05:49:30,524 INFO L87 Difference]: Start difference. First operand 222 states and 258 transitions. Second operand has 31 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:50:59,119 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-03 05:50:59,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-03 05:50:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:50:59,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-03 05:50:59,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-11-03 05:50:59,320 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 49 more [2021-11-03 05:50:59,323 INFO L168 Benchmark]: Toolchain (without parser) took 468953.30 ms. Allocated memory was 119.5 MB in the beginning and 388.0 MB in the end (delta: 268.4 MB). Free memory was 78.5 MB in the beginning and 294.9 MB in the end (delta: -216.3 MB). Peak memory consumption was 51.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:50:59,324 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 119.5 MB. Free memory is still 96.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:50:59,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 516.49 ms. Allocated memory is still 119.5 MB. Free memory was 78.3 MB in the beginning and 85.0 MB in the end (delta: -6.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:50:59,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.29 ms. Allocated memory is still 119.5 MB. Free memory was 85.0 MB in the beginning and 82.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:50:59,324 INFO L168 Benchmark]: Boogie Preprocessor took 40.17 ms. Allocated memory is still 119.5 MB. Free memory was 82.0 MB in the beginning and 79.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:50:59,324 INFO L168 Benchmark]: RCFGBuilder took 736.67 ms. Allocated memory is still 119.5 MB. Free memory was 79.9 MB in the beginning and 54.0 MB in the end (delta: 25.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-03 05:50:59,324 INFO L168 Benchmark]: TraceAbstraction took 467591.16 ms. Allocated memory was 119.5 MB in the beginning and 388.0 MB in the end (delta: 268.4 MB). Free memory was 53.6 MB in the beginning and 294.9 MB in the end (delta: -241.3 MB). Peak memory consumption was 28.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:50:59,325 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 119.5 MB. Free memory is still 96.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 516.49 ms. Allocated memory is still 119.5 MB. Free memory was 78.3 MB in the beginning and 85.0 MB in the end (delta: -6.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.29 ms. Allocated memory is still 119.5 MB. Free memory was 85.0 MB in the beginning and 82.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.17 ms. Allocated memory is still 119.5 MB. Free memory was 82.0 MB in the beginning and 79.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 736.67 ms. Allocated memory is still 119.5 MB. Free memory was 79.9 MB in the beginning and 54.0 MB in the end (delta: 25.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 467591.16 ms. Allocated memory was 119.5 MB in the beginning and 388.0 MB in the end (delta: 268.4 MB). Free memory was 53.6 MB in the beginning and 294.9 MB in the end (delta: -241.3 MB). Peak memory consumption was 28.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH --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 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:51:01,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:51:01,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:51:01,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:51:01,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:51:01,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:51:01,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:51:01,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:51:01,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:51:01,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:51:01,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:51:01,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:51:01,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:51:01,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:51:01,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:51:01,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:51:01,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:51:01,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:51:01,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:51:01,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:51:01,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:51:01,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:51:01,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:51:01,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:51:01,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:51:01,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:51:01,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:51:01,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:51:01,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:51:01,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:51:01,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:51:01,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:51:01,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:51:01,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:51:01,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:51:01,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:51:01,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:51:01,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:51:01,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:51:01,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:51:01,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:51:01,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:51:01,573 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:51:01,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:51:01,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:51:01,574 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:51:01,575 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:51:01,575 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:51:01,575 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:51:01,575 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:51:01,575 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:51:01,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:51:01,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:51:01,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:51:01,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:51:01,577 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:51:01,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:51:01,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:51:01,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:51:01,578 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:51:01,578 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:51:01,579 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:51:01,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:51:01,579 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:51:01,579 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:51:01,579 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:51:01,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:51:01,580 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:51:01,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:51:01,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:51:01,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:51:01,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:51:01,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:51:01,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:51:01,582 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:51:01,582 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:51:01,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:51:01,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:51:01,583 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-11-03 05:51:01,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:51:01,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:51:01,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:51:01,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:51:01,967 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:51:01,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-11-03 05:51:02,033 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data/905dad1a4/b4a86218318b44d3899e740e3056d126/FLAG6e8d6993c [2021-11-03 05:51:02,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:51:02,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-11-03 05:51:02,687 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data/905dad1a4/b4a86218318b44d3899e740e3056d126/FLAG6e8d6993c [2021-11-03 05:51:02,930 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/data/905dad1a4/b4a86218318b44d3899e740e3056d126 [2021-11-03 05:51:02,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:51:02,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:51:02,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:51:02,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:51:02,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:51:02,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:51:02" (1/1) ... [2021-11-03 05:51:02,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f238c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:02, skipping insertion in model container [2021-11-03 05:51:02,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:51:02" (1/1) ... [2021-11-03 05:51:02,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:51:02,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:51:03,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:51:03,421 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:51:03,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:51:03,566 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:51:03,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03 WrapperNode [2021-11-03 05:51:03,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:51:03,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:51:03,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:51:03,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:51:03,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:51:03,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:51:03,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:51:03,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:51:03,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:51:03,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:51:03,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:51:03,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:51:03,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (1/1) ... [2021-11-03 05:51:03,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:51:03,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:51:03,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:51:03,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:51:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:51:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:51:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:51:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:51:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:51:03,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:51:03,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:51:03,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:51:03,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:51:04,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:51:04,644 INFO L299 CfgBuilder]: Removed 31 assume(true) statements. [2021-11-03 05:51:04,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:51:04 BoogieIcfgContainer [2021-11-03 05:51:04,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:51:04,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:51:04,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:51:04,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:51:04,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:51:02" (1/3) ... [2021-11-03 05:51:04,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c483f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:51:04, skipping insertion in model container [2021-11-03 05:51:04,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:51:03" (2/3) ... [2021-11-03 05:51:04,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c483f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:51:04, skipping insertion in model container [2021-11-03 05:51:04,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:51:04" (3/3) ... [2021-11-03 05:51:04,654 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-11-03 05:51:04,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:51:04,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-11-03 05:51:04,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:51:04,708 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:51:04,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-11-03 05:51:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 97 states have (on average 1.9381443298969072) internal successors, (188), 164 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 05:51:04,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:04,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 05:51:04,732 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:51:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-11-03 05:51:04,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:04,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275210799] [2021-11-03 05:51:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:04,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:04,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:04,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:04,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:51:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:04,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:51:04,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:05,292 INFO L354 Elim1Store]: treesize reduction 351, result has 15.4 percent of original size [2021-11-03 05:51:05,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 69 [2021-11-03 05:51:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:06,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:06,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:06,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275210799] [2021-11-03 05:51:06,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275210799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:06,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:06,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-03 05:51:06,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242218239] [2021-11-03 05:51:06,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:51:06,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:51:06,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:51:06,255 INFO L87 Difference]: Start difference. First operand has 165 states, 97 states have (on average 1.9381443298969072) internal successors, (188), 164 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:06,577 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2021-11-03 05:51:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:51:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-03 05:51:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:06,593 INFO L225 Difference]: With dead ends: 177 [2021-11-03 05:51:06,593 INFO L226 Difference]: Without dead ends: 173 [2021-11-03 05:51:06,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:51:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-03 05:51:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2021-11-03 05:51:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.7924528301886793) internal successors, (190), 165 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:06,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 190 transitions. [2021-11-03 05:51:06,636 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 190 transitions. Word has length 4 [2021-11-03 05:51:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:06,636 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 190 transitions. [2021-11-03 05:51:06,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 190 transitions. [2021-11-03 05:51:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 05:51:06,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:06,638 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 05:51:06,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:06,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:06,844 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:51:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-11-03 05:51:06,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:06,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262691887] [2021-11-03 05:51:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:06,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:06,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:06,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:06,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:51:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:06,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:51:06,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:07,173 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-11-03 05:51:07,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 51 [2021-11-03 05:51:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:07,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:07,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:07,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262691887] [2021-11-03 05:51:07,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262691887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:07,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:07,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-03 05:51:07,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142459529] [2021-11-03 05:51:07,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:51:07,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:51:07,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:51:07,504 INFO L87 Difference]: Start difference. First operand 166 states and 190 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:08,460 INFO L93 Difference]: Finished difference Result 393 states and 438 transitions. [2021-11-03 05:51:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:51:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-03 05:51:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:08,465 INFO L225 Difference]: With dead ends: 393 [2021-11-03 05:51:08,465 INFO L226 Difference]: Without dead ends: 393 [2021-11-03 05:51:08,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:51:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-03 05:51:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 238. [2021-11-03 05:51:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 178 states have (on average 1.7191011235955056) internal successors, (306), 237 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 306 transitions. [2021-11-03 05:51:08,487 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 306 transitions. Word has length 4 [2021-11-03 05:51:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:08,487 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 306 transitions. [2021-11-03 05:51:08,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 306 transitions. [2021-11-03 05:51:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:51:08,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:08,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:51:08,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:08,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:08,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:51:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash 28698698, now seen corresponding path program 1 times [2021-11-03 05:51:08,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:08,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321501881] [2021-11-03 05:51:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:08,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:08,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:08,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:51:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:08,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 05:51:08,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:09,128 INFO L354 Elim1Store]: treesize reduction 479, result has 13.1 percent of original size [2021-11-03 05:51:09,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 12 case distinctions, treesize of input 310 treesize of output 346 [2021-11-03 05:51:09,209 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-03 05:51:09,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 346 [2021-11-03 05:51:15,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 105 [2021-11-03 05:51:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:16,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:17,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:17,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321501881] [2021-11-03 05:51:17,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321501881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:17,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:17,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-03 05:51:17,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896612251] [2021-11-03 05:51:17,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:51:17,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:17,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:51:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:51:17,086 INFO L87 Difference]: Start difference. First operand 238 states and 306 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:22,730 INFO L93 Difference]: Finished difference Result 499 states and 629 transitions. [2021-11-03 05:51:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:51:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 05:51:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:22,735 INFO L225 Difference]: With dead ends: 499 [2021-11-03 05:51:22,735 INFO L226 Difference]: Without dead ends: 499 [2021-11-03 05:51:22,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:51:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-03 05:51:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 290. [2021-11-03 05:51:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 230 states have (on average 1.691304347826087) internal successors, (389), 289 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 389 transitions. [2021-11-03 05:51:22,770 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 389 transitions. Word has length 5 [2021-11-03 05:51:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:22,771 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 389 transitions. [2021-11-03 05:51:22,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:22,771 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 389 transitions. [2021-11-03 05:51:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:51:22,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:22,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:51:22,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 05:51:22,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:22,986 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:51:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash 889659685, now seen corresponding path program 1 times [2021-11-03 05:51:22,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:22,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086687474] [2021-11-03 05:51:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:22,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:22,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:22,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:22,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:51:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:23,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:51:23,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:23,414 INFO L354 Elim1Store]: treesize reduction 336, result has 13.8 percent of original size [2021-11-03 05:51:23,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 144 [2021-11-03 05:51:23,436 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-03 05:51:23,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 365 treesize of output 345 [2021-11-03 05:51:23,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:51:23,475 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-03 05:51:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 335 [2021-11-03 05:51:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 83 [2021-11-03 05:51:26,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 72 [2021-11-03 05:51:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:30,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:30,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:30,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086687474] [2021-11-03 05:51:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086687474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:30,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:30,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-03 05:51:30,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553358511] [2021-11-03 05:51:30,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:51:30,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:30,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:51:30,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:51:30,294 INFO L87 Difference]: Start difference. First operand 290 states and 389 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:32,382 INFO L93 Difference]: Finished difference Result 639 states and 753 transitions. [2021-11-03 05:51:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:51:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 05:51:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:32,388 INFO L225 Difference]: With dead ends: 639 [2021-11-03 05:51:32,388 INFO L226 Difference]: Without dead ends: 639 [2021-11-03 05:51:32,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:51:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-03 05:51:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 318. [2021-11-03 05:51:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 258 states have (on average 1.6589147286821706) internal successors, (428), 317 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 428 transitions. [2021-11-03 05:51:32,408 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 428 transitions. Word has length 6 [2021-11-03 05:51:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:32,409 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 428 transitions. [2021-11-03 05:51:32,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 428 transitions. [2021-11-03 05:51:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 05:51:32,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:32,410 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:32,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:32,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:32,624 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:51:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646508, now seen corresponding path program 1 times [2021-11-03 05:51:32,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:32,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838705977] [2021-11-03 05:51:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:32,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:32,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:32,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:32,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:51:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:32,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:51:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:32,957 INFO L354 Elim1Store]: treesize reduction 351, result has 15.4 percent of original size [2021-11-03 05:51:32,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 209 treesize of output 249 [2021-11-03 05:51:32,983 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:51:32,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 247 [2021-11-03 05:51:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:39,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:39,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:39,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838705977] [2021-11-03 05:51:39,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838705977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:39,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:39,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-03 05:51:39,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115093141] [2021-11-03 05:51:39,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:51:39,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:51:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:51:39,170 INFO L87 Difference]: Start difference. First operand 318 states and 428 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:40,488 INFO L93 Difference]: Finished difference Result 436 states and 553 transitions. [2021-11-03 05:51:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:51:40,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 05:51:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:40,491 INFO L225 Difference]: With dead ends: 436 [2021-11-03 05:51:40,492 INFO L226 Difference]: Without dead ends: 436 [2021-11-03 05:51:40,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:51:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-03 05:51:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 324. [2021-11-03 05:51:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 265 states have (on average 1.6415094339622642) internal successors, (435), 323 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 435 transitions. [2021-11-03 05:51:40,502 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 435 transitions. Word has length 7 [2021-11-03 05:51:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:40,503 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 435 transitions. [2021-11-03 05:51:40,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 435 transitions. [2021-11-03 05:51:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:51:40,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:40,504 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:40,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:40,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:40,715 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:51:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash 264466951, now seen corresponding path program 1 times [2021-11-03 05:51:40,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:40,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704546086] [2021-11-03 05:51:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:40,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:40,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:40,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:40,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:51:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:40,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:51:40,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:41,057 INFO L354 Elim1Store]: treesize reduction 240, result has 16.1 percent of original size [2021-11-03 05:51:41,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 90 [2021-11-03 05:51:41,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 110 [2021-11-03 05:51:41,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:51:41,075 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:51:41,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 104 [2021-11-03 05:51:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:53,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:51:53,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:53,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704546086] [2021-11-03 05:51:53,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704546086] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:53,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:53,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-03 05:51:53,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003290288] [2021-11-03 05:51:53,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:51:53,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:51:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:51:53,832 INFO L87 Difference]: Start difference. First operand 324 states and 435 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:55,626 INFO L93 Difference]: Finished difference Result 466 states and 549 transitions. [2021-11-03 05:51:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:51:55,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 05:51:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:55,629 INFO L225 Difference]: With dead ends: 466 [2021-11-03 05:51:55,629 INFO L226 Difference]: Without dead ends: 466 [2021-11-03 05:51:55,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:51:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-03 05:51:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 326. [2021-11-03 05:51:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 268 states have (on average 1.6194029850746268) internal successors, (434), 325 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 434 transitions. [2021-11-03 05:51:55,638 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 434 transitions. Word has length 8 [2021-11-03 05:51:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:55,639 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 434 transitions. [2021-11-03 05:51:55,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 434 transitions. [2021-11-03 05:51:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:51:55,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:55,640 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:51:55,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:55,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:51:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -313900157, now seen corresponding path program 1 times [2021-11-03 05:51:55,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:55,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084904555] [2021-11-03 05:51:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:55,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:55,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:55,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:51:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:56,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:51:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:56,326 INFO L354 Elim1Store]: treesize reduction 483, result has 13.6 percent of original size [2021-11-03 05:51:56,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 292 treesize of output 334 [2021-11-03 05:51:56,339 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-03 05:51:56,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 330 [2021-11-03 05:52:09,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 106 [2021-11-03 05:52:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:52:11,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:52:11,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:52:11,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084904555] [2021-11-03 05:52:11,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084904555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:11,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1863585639] [2021-11-03 05:52:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:11,371 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:52:11,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:52:11,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:52:11,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 05:52:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 05:52:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:12,109 INFO L354 Elim1Store]: treesize reduction 491, result has 13.4 percent of original size [2021-11-03 05:52:12,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 587 treesize of output 619 [2021-11-03 05:52:28,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 118 [2021-11-03 05:52:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:52:30,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:52:30,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1863585639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:30,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728468353] [2021-11-03 05:52:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:52:30,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:52:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:52:30,484 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:52:30,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 05:52:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:52:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:52:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:52:31,634 INFO L354 Elim1Store]: treesize reduction 507, result has 13.0 percent of original size [2021-11-03 05:52:31,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 1326 treesize of output 1352 [2021-11-03 05:52:31,797 INFO L354 Elim1Store]: treesize reduction 380, result has 7.8 percent of original size [2021-11-03 05:52:31,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 1348 treesize of output 1357 [2021-11-03 05:52:55,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 137 [2021-11-03 05:52:55,508 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-03 05:52:55,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 134 treesize of output 140 [2021-11-03 05:52:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:52:58,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:52:58,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728468353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:52:58,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:52:58,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 25 [2021-11-03 05:52:58,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843175052] [2021-11-03 05:52:58,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-03 05:52:58,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:52:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-03 05:52:58,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-11-03 05:52:58,632 INFO L87 Difference]: Start difference. First operand 326 states and 434 transitions. Second operand has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:24,562 WARN L207 SmtUtils]: Spent 7.57 s on a formula simplification. DAG size of input: 141 DAG size of output: 109 [2021-11-03 05:53:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:53:53,941 INFO L93 Difference]: Finished difference Result 1027 states and 1285 transitions. [2021-11-03 05:53:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 05:53:53,942 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:53:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:53:53,948 INFO L225 Difference]: With dead ends: 1027 [2021-11-03 05:53:53,948 INFO L226 Difference]: Without dead ends: 1027 [2021-11-03 05:53:53,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-11-03 05:53:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-11-03 05:53:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 423. [2021-11-03 05:53:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 365 states have (on average 1.5808219178082192) internal successors, (577), 422 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 577 transitions. [2021-11-03 05:53:53,964 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 577 transitions. Word has length 13 [2021-11-03 05:53:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:53:53,965 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 577 transitions. [2021-11-03 05:53:53,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:53:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 577 transitions. [2021-11-03 05:53:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 05:53:53,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:53:53,966 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:53:53,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:54,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:54,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:53:54,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:53:54,580 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:53:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:53:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1140970228, now seen corresponding path program 1 times [2021-11-03 05:53:54,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:53:54,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62897338] [2021-11-03 05:53:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:53:54,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:53:54,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:53:54,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:53:54,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:53:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:53:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:53:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:53:55,351 INFO L354 Elim1Store]: treesize reduction 354, result has 14.1 percent of original size [2021-11-03 05:53:55,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 141 [2021-11-03 05:53:55,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:53:55,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 212 [2021-11-03 05:53:55,382 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-03 05:53:55,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 208 [2021-11-03 05:54:16,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2021-11-03 05:54:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 85 [2021-11-03 05:54:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:22,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:23,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:54:23,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62897338] [2021-11-03 05:54:23,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62897338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:54:23,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [775414057] [2021-11-03 05:54:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:54:23,074 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:54:23,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:54:23,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:54:23,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-03 05:54:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:54:23,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 05:54:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:24,180 INFO L354 Elim1Store]: treesize reduction 354, result has 14.1 percent of original size [2021-11-03 05:54:24,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 105 treesize of output 140 [2021-11-03 05:54:24,190 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-03 05:54:24,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 559 treesize of output 523 [2021-11-03 05:54:50,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 120 [2021-11-03 05:54:50,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 93 [2021-11-03 05:54:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:57,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:54:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:54:57,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [775414057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:54:57,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163435222] [2021-11-03 05:54:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:54:57,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:54:57,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:54:57,930 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:54:57,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-03 05:54:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:54:58,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:54:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:54:58,723 INFO L354 Elim1Store]: treesize reduction 354, result has 14.1 percent of original size [2021-11-03 05:54:58,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 87 [2021-11-03 05:54:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 213 [2021-11-03 05:55:00,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2021-11-03 05:55:00,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 52 [2021-11-03 05:55:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:01,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:02,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163435222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:55:02,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:55:02,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 19 [2021-11-03 05:55:02,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123478769] [2021-11-03 05:55:02,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 05:55:02,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:55:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 05:55:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=317, Unknown=1, NotChecked=0, Total=420 [2021-11-03 05:55:02,025 INFO L87 Difference]: Start difference. First operand 423 states and 577 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:55:15,115 INFO L93 Difference]: Finished difference Result 1176 states and 1397 transitions. [2021-11-03 05:55:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:55:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 05:55:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:55:15,121 INFO L225 Difference]: With dead ends: 1176 [2021-11-03 05:55:15,121 INFO L226 Difference]: Without dead ends: 1176 [2021-11-03 05:55:15,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=266, Invalid=855, Unknown=1, NotChecked=0, Total=1122 [2021-11-03 05:55:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-11-03 05:55:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 503. [2021-11-03 05:55:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 445 states have (on average 1.5460674157303371) internal successors, (688), 502 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 688 transitions. [2021-11-03 05:55:15,140 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 688 transitions. Word has length 14 [2021-11-03 05:55:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:55:15,140 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 688 transitions. [2021-11-03 05:55:15,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 688 transitions. [2021-11-03 05:55:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 05:55:15,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:55:15,141 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:55:15,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-03 05:55:15,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:55:15,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:55:15,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:55:15,746 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:55:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:55:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash -723310322, now seen corresponding path program 1 times [2021-11-03 05:55:15,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:55:15,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328150364] [2021-11-03 05:55:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:15,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:55:15,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:55:15,748 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:55:15,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:55:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:16,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:55:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:16,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:16,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:55:16,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328150364] [2021-11-03 05:55:16,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328150364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:55:16,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:55:16,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:55:16,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670644282] [2021-11-03 05:55:16,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:55:16,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:55:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:55:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:55:16,399 INFO L87 Difference]: Start difference. First operand 503 states and 688 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:55:16,419 INFO L93 Difference]: Finished difference Result 523 states and 700 transitions. [2021-11-03 05:55:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:55:16,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 05:55:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:55:16,422 INFO L225 Difference]: With dead ends: 523 [2021-11-03 05:55:16,423 INFO L226 Difference]: Without dead ends: 523 [2021-11-03 05:55:16,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:55:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-03 05:55:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 461. [2021-11-03 05:55:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 421 states have (on average 1.510688836104513) internal successors, (636), 460 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 636 transitions. [2021-11-03 05:55:16,435 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 636 transitions. Word has length 16 [2021-11-03 05:55:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:55:16,435 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 636 transitions. [2021-11-03 05:55:16,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 636 transitions. [2021-11-03 05:55:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 05:55:16,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:55:16,437 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:55:16,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:55:16,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:55:16,650 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:55:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:55:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash -723310578, now seen corresponding path program 1 times [2021-11-03 05:55:16,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:55:16,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315069287] [2021-11-03 05:55:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:16,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:55:16,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:55:16,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:55:16,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:55:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:55:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:17,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:17,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:55:17,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315069287] [2021-11-03 05:55:17,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315069287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:55:17,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:55:17,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-03 05:55:17,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503200411] [2021-11-03 05:55:17,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:55:17,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:55:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:55:17,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:55:17,478 INFO L87 Difference]: Start difference. First operand 461 states and 636 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:17,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:55:17,534 INFO L93 Difference]: Finished difference Result 605 states and 822 transitions. [2021-11-03 05:55:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:55:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 05:55:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:55:17,538 INFO L225 Difference]: With dead ends: 605 [2021-11-03 05:55:17,538 INFO L226 Difference]: Without dead ends: 605 [2021-11-03 05:55:17,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:55:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-03 05:55:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 585. [2021-11-03 05:55:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 547 states have (on average 1.4972577696526508) internal successors, (819), 584 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 819 transitions. [2021-11-03 05:55:17,552 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 819 transitions. Word has length 16 [2021-11-03 05:55:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:55:17,552 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 819 transitions. [2021-11-03 05:55:17,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 819 transitions. [2021-11-03 05:55:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 05:55:17,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:55:17,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:55:17,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 05:55:17,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:55:17,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:55:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:55:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash -947791364, now seen corresponding path program 1 times [2021-11-03 05:55:17,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:55:17,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379057591] [2021-11-03 05:55:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:17,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:55:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:55:17,769 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:55:17,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:55:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:55:18,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:18,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:18,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:55:18,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379057591] [2021-11-03 05:55:18,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379057591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:55:18,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:55:18,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-03 05:55:18,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683072142] [2021-11-03 05:55:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:55:18,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:55:18,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:55:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:55:18,516 INFO L87 Difference]: Start difference. First operand 585 states and 819 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:55:18,624 INFO L93 Difference]: Finished difference Result 653 states and 874 transitions. [2021-11-03 05:55:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:55:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-03 05:55:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:55:18,628 INFO L225 Difference]: With dead ends: 653 [2021-11-03 05:55:18,628 INFO L226 Difference]: Without dead ends: 653 [2021-11-03 05:55:18,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:55:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-03 05:55:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 617. [2021-11-03 05:55:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 583 states have (on average 1.4819897084048028) internal successors, (864), 616 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 864 transitions. [2021-11-03 05:55:18,642 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 864 transitions. Word has length 17 [2021-11-03 05:55:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:55:18,642 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 864 transitions. [2021-11-03 05:55:18,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:18,643 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 864 transitions. [2021-11-03 05:55:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:55:18,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:55:18,644 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-03 05:55:18,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:55:18,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:55:18,857 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:55:18,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:55:18,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1890108268, now seen corresponding path program 1 times [2021-11-03 05:55:18,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:55:18,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022471381] [2021-11-03 05:55:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:18,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:55:18,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:55:18,859 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:55:18,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:55:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:19,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:55:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:19,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:19,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:55:19,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022471381] [2021-11-03 05:55:19,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022471381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:55:19,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815404530] [2021-11-03 05:55:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:19,725 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:55:19,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:55:19,726 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:55:19,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-03 05:55:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:20,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:55:20,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:20,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:20,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815404530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:55:20,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080354161] [2021-11-03 05:55:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:20,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:55:20,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:55:20,649 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:55:20,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-03 05:55:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:55:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:21,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:21,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080354161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:55:21,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:55:21,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 05:55:21,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527576137] [2021-11-03 05:55:21,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:55:21,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:55:21,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:55:21,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:55:21,461 INFO L87 Difference]: Start difference. First operand 617 states and 864 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:55:21,707 INFO L93 Difference]: Finished difference Result 631 states and 792 transitions. [2021-11-03 05:55:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:55:21,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 05:55:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:55:21,710 INFO L225 Difference]: With dead ends: 631 [2021-11-03 05:55:21,711 INFO L226 Difference]: Without dead ends: 631 [2021-11-03 05:55:21,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:55:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-03 05:55:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 442. [2021-11-03 05:55:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 413 states have (on average 1.4019370460048426) internal successors, (579), 441 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 579 transitions. [2021-11-03 05:55:21,722 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 579 transitions. Word has length 20 [2021-11-03 05:55:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:55:21,722 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 579 transitions. [2021-11-03 05:55:21,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 579 transitions. [2021-11-03 05:55:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 05:55:21,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:55:21,724 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:55:21,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 05:55:21,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:55:22,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:55:22,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:55:22,341 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2021-11-03 05:55:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:55:22,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1087886755, now seen corresponding path program 1 times [2021-11-03 05:55:22,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:55:22,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420558185] [2021-11-03 05:55:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:55:22,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:55:22,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:55:22,342 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:55:22,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:55:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:55:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:55:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:55:23,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 05:55:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:23,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:55:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:55:23,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:55:23,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420558185] [2021-11-03 05:55:23,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420558185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:55:23,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:55:23,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:55:23,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585335168] [2021-11-03 05:55:23,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:55:23,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:55:23,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:55:23,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:55:23,389 INFO L87 Difference]: Start difference. First operand 442 states and 579 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:55:23,777 INFO L93 Difference]: Finished difference Result 773 states and 979 transitions. [2021-11-03 05:55:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:55:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 05:55:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:55:23,782 INFO L225 Difference]: With dead ends: 773 [2021-11-03 05:55:23,782 INFO L226 Difference]: Without dead ends: 773 [2021-11-03 05:55:23,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:55:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-03 05:55:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 471. [2021-11-03 05:55:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 442 states have (on average 1.3846153846153846) internal successors, (612), 470 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 612 transitions. [2021-11-03 05:55:23,794 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 612 transitions. Word has length 22 [2021-11-03 05:55:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:55:23,795 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 612 transitions. [2021-11-03 05:55:23,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:55:23,795 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 612 transitions. [2021-11-03 05:55:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 05:55:23,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:55:23,796 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:55:23,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba725c7d-82d7-4029-a011-226794132c9d/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0