./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0218.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0218.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P --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 d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:46:21,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:46:21,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:46:21,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:46:21,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:46:21,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:46:21,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:46:21,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:46:21,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:46:21,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:46:21,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:46:21,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:46:21,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:46:21,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:46:21,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:46:21,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:46:21,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:46:21,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:46:21,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:46:21,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:46:21,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:46:21,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:46:21,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:46:21,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:46:21,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:46:21,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:46:21,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:46:21,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:46:21,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:46:21,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:46:21,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:46:21,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:46:21,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:46:21,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:46:21,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:46:21,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:46:21,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:46:21,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:46:21,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:46:21,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:46:21,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:46:21,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 23:46:21,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:46:21,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:46:21,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:46:21,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:46:21,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:46:21,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:46:21,219 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:46:21,219 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:46:21,219 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:46:21,219 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:46:21,220 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:46:21,221 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:46:21,221 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:46:21,221 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:46:21,222 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:46:21,222 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:46:21,222 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:46:21,222 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:46:21,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:46:21,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:46:21,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:46:21,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:46:21,224 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:46:21,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:46:21,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:46:21,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:46:21,227 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:46:21,227 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:46:21,227 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:46:21,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:46:21,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:46:21,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:46:21,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:46:21,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:46:21,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:46:21,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:46:21,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:46:21,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:46:21,230 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:46:21,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:46:21,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:46:21,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:46:21,231 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_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 [2021-11-20 23:46:21,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:46:21,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:46:21,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:46:21,565 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:46:21,566 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:46:21,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety/test-0218.i [2021-11-20 23:46:21,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/data/cef37d7bb/74f6c8b505974076bf8748897bf42f76/FLAG71ae007e5 [2021-11-20 23:46:22,123 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:46:22,123 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/sv-benchmarks/c/memsafety/test-0218.i [2021-11-20 23:46:22,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/data/cef37d7bb/74f6c8b505974076bf8748897bf42f76/FLAG71ae007e5 [2021-11-20 23:46:22,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/data/cef37d7bb/74f6c8b505974076bf8748897bf42f76 [2021-11-20 23:46:22,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:46:22,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:46:22,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:46:22,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:46:22,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:46:22,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:22" (1/1) ... [2021-11-20 23:46:22,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a18fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:22, skipping insertion in model container [2021-11-20 23:46:22,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:22" (1/1) ... [2021-11-20 23:46:22,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:46:22,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:46:22,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:46:22,928 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:46:22,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:46:23,035 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:46:23,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23 WrapperNode [2021-11-20 23:46:23,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:46:23,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:46:23,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:46:23,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:46:23,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,105 INFO L137 Inliner]: procedures = 181, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 216 [2021-11-20 23:46:23,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:46:23,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:46:23,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:46:23,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:46:23,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:46:23,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:46:23,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:46:23,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:46:23,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (1/1) ... [2021-11-20 23:46:23,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:46:23,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:23,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:46:23,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:46:23,258 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-11-20 23:46:23,260 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-11-20 23:46:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:46:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:46:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:46:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:46:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:46:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:46:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:46:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:46:23,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:46:23,430 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:46:23,431 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:46:23,940 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:46:24,050 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:46:24,050 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 23:46:24,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:46:24 BoogieIcfgContainer [2021-11-20 23:46:24,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:46:24,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:46:24,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:46:24,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:46:24,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:46:22" (1/3) ... [2021-11-20 23:46:24,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a7ef8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:46:24, skipping insertion in model container [2021-11-20 23:46:24,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:23" (2/3) ... [2021-11-20 23:46:24,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a7ef8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:46:24, skipping insertion in model container [2021-11-20 23:46:24,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:46:24" (3/3) ... [2021-11-20 23:46:24,062 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0218.i [2021-11-20 23:46:24,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:46:24,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2021-11-20 23:46:24,112 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:46:24,119 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 [2021-11-20 23:46:24,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2021-11-20 23:46:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 66 states have (on average 2.257575757575758) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:46:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:46:24,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:24,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:46:24,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:24,149 INFO L85 PathProgramCache]: Analyzing trace with hash 10513305, now seen corresponding path program 1 times [2021-11-20 23:46:24,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:24,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603526280] [2021-11-20 23:46:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:24,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:24,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603526280] [2021-11-20 23:46:24,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603526280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:24,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:24,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:46:24,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27374817] [2021-11-20 23:46:24,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:24,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:46:24,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:46:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:46:24,320 INFO L87 Difference]: Start difference. First operand has 135 states, 66 states have (on average 2.257575757575758) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 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) [2021-11-20 23:46:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:24,384 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2021-11-20 23:46:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:46:24,386 INFO L78 Accepts]: Start accepts. Automaton has has 2 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 [2021-11-20 23:46:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:24,395 INFO L225 Difference]: With dead ends: 135 [2021-11-20 23:46:24,395 INFO L226 Difference]: Without dead ends: 134 [2021-11-20 23:46:24,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:46:24,400 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:24,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:46:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-20 23:46:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-20 23:46:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 66 states have (on average 2.1818181818181817) internal successors, (144), 130 states have internal predecessors, (144), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:46:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2021-11-20 23:46:24,447 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 4 [2021-11-20 23:46:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:24,448 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2021-11-20 23:46:24,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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) [2021-11-20 23:46:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2021-11-20 23:46:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:46:24,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:24,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:46:24,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:46:24,449 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 318104419, now seen corresponding path program 1 times [2021-11-20 23:46:24,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326858863] [2021-11-20 23:46:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:24,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:24,526 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:24,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326858863] [2021-11-20 23:46:24,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326858863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:24,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:24,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 23:46:24,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601837832] [2021-11-20 23:46:24,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:24,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:46:24,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:46:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:46:24,529 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-20 23:46:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:24,752 INFO L93 Difference]: Finished difference Result 261 states and 288 transitions. [2021-11-20 23:46:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:46:24,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-11-20 23:46:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:24,756 INFO L225 Difference]: With dead ends: 261 [2021-11-20 23:46:24,756 INFO L226 Difference]: Without dead ends: 261 [2021-11-20 23:46:24,757 INFO L932 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 [2021-11-20 23:46:24,758 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 132 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:24,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 156 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-20 23:46:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 176. [2021-11-20 23:46:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 105 states have (on average 2.1619047619047618) internal successors, (227), 169 states have internal predecessors, (227), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:46:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 235 transitions. [2021-11-20 23:46:24,782 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 235 transitions. Word has length 5 [2021-11-20 23:46:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:24,782 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 235 transitions. [2021-11-20 23:46:24,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-20 23:46:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 235 transitions. [2021-11-20 23:46:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:46:24,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:24,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:46:24,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:46:24,784 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash 318104420, now seen corresponding path program 1 times [2021-11-20 23:46:24,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:24,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065459860] [2021-11-20 23:46:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:24,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:24,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065459860] [2021-11-20 23:46:24,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065459860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:24,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:24,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:46:24,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423922752] [2021-11-20 23:46:24,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:24,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:24,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:24,914 INFO L87 Difference]: Start difference. First operand 176 states and 235 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) [2021-11-20 23:46:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:25,063 INFO L93 Difference]: Finished difference Result 175 states and 233 transitions. [2021-11-20 23:46:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:25,063 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 [2021-11-20 23:46:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:25,065 INFO L225 Difference]: With dead ends: 175 [2021-11-20 23:46:25,065 INFO L226 Difference]: Without dead ends: 175 [2021-11-20 23:46:25,065 INFO L932 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 [2021-11-20 23:46:25,067 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 157 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:25,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 157 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:25,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-20 23:46:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-20 23:46:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 105 states have (on average 2.142857142857143) internal successors, (225), 168 states have internal predecessors, (225), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:46:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 233 transitions. [2021-11-20 23:46:25,081 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 233 transitions. Word has length 5 [2021-11-20 23:46:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:25,081 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 233 transitions. [2021-11-20 23:46:25,082 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) [2021-11-20 23:46:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 233 transitions. [2021-11-20 23:46:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:46:25,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:25,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:25,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:46:25,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash 755711942, now seen corresponding path program 1 times [2021-11-20 23:46:25,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:25,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098645397] [2021-11-20 23:46:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:25,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:25,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:25,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098645397] [2021-11-20 23:46:25,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098645397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:25,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:25,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 23:46:25,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022224277] [2021-11-20 23:46:25,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:25,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:46:25,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:25,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:46:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:46:25,118 INFO L87 Difference]: Start difference. First operand 175 states and 233 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) [2021-11-20 23:46:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:25,261 INFO L93 Difference]: Finished difference Result 248 states and 314 transitions. [2021-11-20 23:46:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:46:25,261 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 [2021-11-20 23:46:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:25,263 INFO L225 Difference]: With dead ends: 248 [2021-11-20 23:46:25,263 INFO L226 Difference]: Without dead ends: 247 [2021-11-20 23:46:25,264 INFO L932 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 [2021-11-20 23:46:25,265 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 67 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:25,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 226 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-20 23:46:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 192. [2021-11-20 23:46:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 121 states have (on average 2.0661157024793386) internal successors, (250), 184 states have internal predecessors, (250), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 23:46:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 260 transitions. [2021-11-20 23:46:25,277 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 260 transitions. Word has length 7 [2021-11-20 23:46:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:25,278 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 260 transitions. [2021-11-20 23:46:25,278 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) [2021-11-20 23:46:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 260 transitions. [2021-11-20 23:46:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:46:25,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:25,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:25,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:46:25,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash 755710471, now seen corresponding path program 1 times [2021-11-20 23:46:25,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:25,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358469551] [2021-11-20 23:46:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:25,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:25,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:25,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358469551] [2021-11-20 23:46:25,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358469551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:25,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:25,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:25,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546660295] [2021-11-20 23:46:25,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:25,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:25,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:25,567 INFO L87 Difference]: Start difference. First operand 192 states and 260 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-11-20 23:46:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:25,845 INFO L93 Difference]: Finished difference Result 293 states and 383 transitions. [2021-11-20 23:46:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:46:25,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2021-11-20 23:46:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:25,848 INFO L225 Difference]: With dead ends: 293 [2021-11-20 23:46:25,848 INFO L226 Difference]: Without dead ends: 290 [2021-11-20 23:46:25,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:46:25,850 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 96 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:25,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 443 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-20 23:46:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 225. [2021-11-20 23:46:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 149 states have (on average 2.033557046979866) internal successors, (303), 214 states have internal predecessors, (303), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 319 transitions. [2021-11-20 23:46:25,862 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 319 transitions. Word has length 7 [2021-11-20 23:46:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:25,863 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 319 transitions. [2021-11-20 23:46:25,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-11-20 23:46:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 319 transitions. [2021-11-20 23:46:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:46:25,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:25,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:25,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:46:25,864 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash 434165795, now seen corresponding path program 1 times [2021-11-20 23:46:25,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:25,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873467909] [2021-11-20 23:46:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:25,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:25,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:25,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873467909] [2021-11-20 23:46:25,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873467909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:25,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:25,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:46:25,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827800483] [2021-11-20 23:46:25,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:25,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:25,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:25,979 INFO L87 Difference]: Start difference. First operand 225 states and 319 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:26,284 INFO L93 Difference]: Finished difference Result 423 states and 491 transitions. [2021-11-20 23:46:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:46:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-20 23:46:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:26,289 INFO L225 Difference]: With dead ends: 423 [2021-11-20 23:46:26,289 INFO L226 Difference]: Without dead ends: 423 [2021-11-20 23:46:26,289 INFO L932 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 [2021-11-20 23:46:26,292 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 372 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:26,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 274 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:46:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-20 23:46:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 222. [2021-11-20 23:46:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 150 states have (on average 1.98) internal successors, (297), 211 states have internal predecessors, (297), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 313 transitions. [2021-11-20 23:46:26,304 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 313 transitions. Word has length 10 [2021-11-20 23:46:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:26,305 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 313 transitions. [2021-11-20 23:46:26,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 313 transitions. [2021-11-20 23:46:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:46:26,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:26,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:26,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:46:26,306 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:26,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:26,307 INFO L85 PathProgramCache]: Analyzing trace with hash 434165796, now seen corresponding path program 1 times [2021-11-20 23:46:26,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:26,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822142832] [2021-11-20 23:46:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:26,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:26,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:26,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822142832] [2021-11-20 23:46:26,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822142832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:26,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:26,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:46:26,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555682362] [2021-11-20 23:46:26,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:26,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:46:26,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:26,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:46:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:26,497 INFO L87 Difference]: Start difference. First operand 222 states and 313 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:26,875 INFO L93 Difference]: Finished difference Result 382 states and 522 transitions. [2021-11-20 23:46:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:46:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-20 23:46:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:26,878 INFO L225 Difference]: With dead ends: 382 [2021-11-20 23:46:26,878 INFO L226 Difference]: Without dead ends: 382 [2021-11-20 23:46:26,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:46:26,879 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 420 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:26,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 428 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:46:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-20 23:46:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 251. [2021-11-20 23:46:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 179 states have (on average 1.9776536312849162) internal successors, (354), 240 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2021-11-20 23:46:26,890 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 10 [2021-11-20 23:46:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:26,891 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2021-11-20 23:46:26,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2021-11-20 23:46:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:46:26,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:26,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:26,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:46:26,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1985193236, now seen corresponding path program 1 times [2021-11-20 23:46:26,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:26,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971593234] [2021-11-20 23:46:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:26,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:26,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:26,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971593234] [2021-11-20 23:46:26,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971593234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:26,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:26,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:46:26,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640549520] [2021-11-20 23:46:26,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:26,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:26,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:26,933 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:27,202 INFO L93 Difference]: Finished difference Result 432 states and 563 transitions. [2021-11-20 23:46:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:27,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-20 23:46:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:27,205 INFO L225 Difference]: With dead ends: 432 [2021-11-20 23:46:27,205 INFO L226 Difference]: Without dead ends: 432 [2021-11-20 23:46:27,206 INFO L932 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 [2021-11-20 23:46:27,206 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 242 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:27,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 268 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-20 23:46:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 257. [2021-11-20 23:46:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 185 states have (on average 1.945945945945946) internal successors, (360), 246 states have internal predecessors, (360), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 376 transitions. [2021-11-20 23:46:27,218 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 376 transitions. Word has length 12 [2021-11-20 23:46:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:27,219 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 376 transitions. [2021-11-20 23:46:27,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 376 transitions. [2021-11-20 23:46:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:46:27,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:27,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:27,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:46:27,220 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:27,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1985193235, now seen corresponding path program 1 times [2021-11-20 23:46:27,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898468682] [2021-11-20 23:46:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:27,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:27,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:27,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898468682] [2021-11-20 23:46:27,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898468682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:27,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:27,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:46:27,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972321826] [2021-11-20 23:46:27,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:27,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:27,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:27,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:27,273 INFO L87 Difference]: Start difference. First operand 257 states and 376 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:27,450 INFO L93 Difference]: Finished difference Result 348 states and 487 transitions. [2021-11-20 23:46:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-20 23:46:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:27,454 INFO L225 Difference]: With dead ends: 348 [2021-11-20 23:46:27,454 INFO L226 Difference]: Without dead ends: 348 [2021-11-20 23:46:27,454 INFO L932 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 [2021-11-20 23:46:27,456 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 264 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:27,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 157 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-20 23:46:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 254. [2021-11-20 23:46:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 185 states have (on average 1.8810810810810812) internal successors, (348), 243 states have internal predecessors, (348), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 364 transitions. [2021-11-20 23:46:27,471 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 364 transitions. Word has length 12 [2021-11-20 23:46:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:27,471 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 364 transitions. [2021-11-20 23:46:27,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 364 transitions. [2021-11-20 23:46:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:46:27,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:27,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:27,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:46:27,473 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2094743984, now seen corresponding path program 1 times [2021-11-20 23:46:27,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:27,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771196485] [2021-11-20 23:46:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:27,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:27,750 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:27,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771196485] [2021-11-20 23:46:27,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771196485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:27,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:27,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:46:27,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215690406] [2021-11-20 23:46:27,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:27,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:46:27,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:46:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:46:27,753 INFO L87 Difference]: Start difference. First operand 254 states and 364 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:28,042 INFO L93 Difference]: Finished difference Result 342 states and 458 transitions. [2021-11-20 23:46:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:46:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-20 23:46:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:28,052 INFO L225 Difference]: With dead ends: 342 [2021-11-20 23:46:28,052 INFO L226 Difference]: Without dead ends: 342 [2021-11-20 23:46:28,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:46:28,053 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 136 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:28,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 577 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-20 23:46:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 260. [2021-11-20 23:46:28,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 191 states have (on average 1.8586387434554974) internal successors, (355), 247 states have internal predecessors, (355), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 371 transitions. [2021-11-20 23:46:28,069 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 371 transitions. Word has length 13 [2021-11-20 23:46:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:28,070 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 371 transitions. [2021-11-20 23:46:28,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 371 transitions. [2021-11-20 23:46:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:46:28,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:28,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:28,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:46:28,072 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1274015445, now seen corresponding path program 1 times [2021-11-20 23:46:28,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:28,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028472237] [2021-11-20 23:46:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:28,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:28,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028472237] [2021-11-20 23:46:28,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028472237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:28,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:28,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:28,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845427979] [2021-11-20 23:46:28,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:28,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:28,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:28,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:28,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:28,185 INFO L87 Difference]: Start difference. First operand 260 states and 371 transitions. Second operand has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:28,382 INFO L93 Difference]: Finished difference Result 336 states and 453 transitions. [2021-11-20 23:46:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:46:28,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 23:46:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:28,388 INFO L225 Difference]: With dead ends: 336 [2021-11-20 23:46:28,388 INFO L226 Difference]: Without dead ends: 336 [2021-11-20 23:46:28,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:28,389 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 178 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:28,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 465 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-20 23:46:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 259. [2021-11-20 23:46:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 191 states have (on average 1.837696335078534) internal successors, (351), 246 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 367 transitions. [2021-11-20 23:46:28,399 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 367 transitions. Word has length 15 [2021-11-20 23:46:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:28,399 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 367 transitions. [2021-11-20 23:46:28,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 367 transitions. [2021-11-20 23:46:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:46:28,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:28,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:28,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:46:28,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:28,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1274015446, now seen corresponding path program 1 times [2021-11-20 23:46:28,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:28,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347346747] [2021-11-20 23:46:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:28,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:28,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:28,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347346747] [2021-11-20 23:46:28,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347346747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:28,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:28,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:46:28,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706551191] [2021-11-20 23:46:28,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:28,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:46:28,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:28,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:46:28,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:46:28,426 INFO L87 Difference]: Start difference. First operand 259 states and 367 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:28,542 INFO L93 Difference]: Finished difference Result 329 states and 439 transitions. [2021-11-20 23:46:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:46:28,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 23:46:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:28,545 INFO L225 Difference]: With dead ends: 329 [2021-11-20 23:46:28,545 INFO L226 Difference]: Without dead ends: 329 [2021-11-20 23:46:28,546 INFO L932 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 [2021-11-20 23:46:28,547 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 115 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:28,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 178 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-20 23:46:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 257. [2021-11-20 23:46:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 191 states have (on average 1.7958115183246073) internal successors, (343), 244 states have internal predecessors, (343), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 359 transitions. [2021-11-20 23:46:28,558 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 359 transitions. Word has length 15 [2021-11-20 23:46:28,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:28,558 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 359 transitions. [2021-11-20 23:46:28,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 359 transitions. [2021-11-20 23:46:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:46:28,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:28,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:28,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:46:28,561 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:28,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1274013657, now seen corresponding path program 1 times [2021-11-20 23:46:28,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:28,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070348447] [2021-11-20 23:46:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:28,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:28,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070348447] [2021-11-20 23:46:28,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070348447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:28,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:28,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:28,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123308982] [2021-11-20 23:46:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:28,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:28,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:28,606 INFO L87 Difference]: Start difference. First operand 257 states and 359 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:28,655 INFO L93 Difference]: Finished difference Result 265 states and 367 transitions. [2021-11-20 23:46:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:28,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 23:46:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:28,658 INFO L225 Difference]: With dead ends: 265 [2021-11-20 23:46:28,658 INFO L226 Difference]: Without dead ends: 265 [2021-11-20 23:46:28,658 INFO L932 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 [2021-11-20 23:46:28,659 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:28,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 338 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:46:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-20 23:46:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2021-11-20 23:46:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 199 states have (on average 1.763819095477387) internal successors, (351), 252 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 367 transitions. [2021-11-20 23:46:28,668 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 367 transitions. Word has length 15 [2021-11-20 23:46:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:28,668 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 367 transitions. [2021-11-20 23:46:28,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 367 transitions. [2021-11-20 23:46:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:46:28,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:28,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:28,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:46:28,673 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:28,674 INFO L85 PathProgramCache]: Analyzing trace with hash -578152977, now seen corresponding path program 1 times [2021-11-20 23:46:28,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:28,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983842689] [2021-11-20 23:46:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:28,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:28,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983842689] [2021-11-20 23:46:28,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983842689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:28,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:28,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:46:28,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424894835] [2021-11-20 23:46:28,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:28,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:46:28,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:46:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:28,893 INFO L87 Difference]: Start difference. First operand 265 states and 367 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:29,222 INFO L93 Difference]: Finished difference Result 460 states and 612 transitions. [2021-11-20 23:46:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:46:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-20 23:46:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:29,225 INFO L225 Difference]: With dead ends: 460 [2021-11-20 23:46:29,226 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 23:46:29,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:46:29,226 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 318 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:29,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 591 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 23:46:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 259. [2021-11-20 23:46:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 193 states have (on average 1.761658031088083) internal successors, (340), 246 states have internal predecessors, (340), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 356 transitions. [2021-11-20 23:46:29,236 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 356 transitions. Word has length 16 [2021-11-20 23:46:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:29,237 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 356 transitions. [2021-11-20 23:46:29,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 356 transitions. [2021-11-20 23:46:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:46:29,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:29,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:29,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:46:29,239 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash -742500568, now seen corresponding path program 1 times [2021-11-20 23:46:29,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:29,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513265851] [2021-11-20 23:46:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:29,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:29,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:29,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513265851] [2021-11-20 23:46:29,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513265851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:29,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:29,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:29,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22668333] [2021-11-20 23:46:29,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:29,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:29,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:29,274 INFO L87 Difference]: Start difference. First operand 259 states and 356 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:29,474 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2021-11-20 23:46:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 23:46:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:29,477 INFO L225 Difference]: With dead ends: 459 [2021-11-20 23:46:29,477 INFO L226 Difference]: Without dead ends: 459 [2021-11-20 23:46:29,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:29,478 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 387 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:29,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 316 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-20 23:46:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 253. [2021-11-20 23:46:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 193 states have (on average 1.7150259067357514) internal successors, (331), 240 states have internal predecessors, (331), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 347 transitions. [2021-11-20 23:46:29,488 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 347 transitions. Word has length 17 [2021-11-20 23:46:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:29,489 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 347 transitions. [2021-11-20 23:46:29,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 347 transitions. [2021-11-20 23:46:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:46:29,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:29,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:29,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:46:29,490 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash -742500567, now seen corresponding path program 1 times [2021-11-20 23:46:29,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:29,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422031381] [2021-11-20 23:46:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:29,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:29,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:29,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422031381] [2021-11-20 23:46:29,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422031381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:29,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:29,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:29,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994397059] [2021-11-20 23:46:29,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:29,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:29,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:29,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:29,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:29,575 INFO L87 Difference]: Start difference. First operand 253 states and 347 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:29,770 INFO L93 Difference]: Finished difference Result 348 states and 464 transitions. [2021-11-20 23:46:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:29,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 23:46:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:29,773 INFO L225 Difference]: With dead ends: 348 [2021-11-20 23:46:29,773 INFO L226 Difference]: Without dead ends: 348 [2021-11-20 23:46:29,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:29,774 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 240 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:29,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 188 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-20 23:46:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 250. [2021-11-20 23:46:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 193 states have (on average 1.6787564766839378) internal successors, (324), 237 states have internal predecessors, (324), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 340 transitions. [2021-11-20 23:46:29,783 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 340 transitions. Word has length 17 [2021-11-20 23:46:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 340 transitions. [2021-11-20 23:46:29,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 340 transitions. [2021-11-20 23:46:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:46:29,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:29,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:29,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:46:29,784 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash -263162037, now seen corresponding path program 1 times [2021-11-20 23:46:29,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:29,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996234675] [2021-11-20 23:46:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:29,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:29,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996234675] [2021-11-20 23:46:29,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996234675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:29,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:29,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:46:29,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960781196] [2021-11-20 23:46:29,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:29,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:29,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:29,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:29,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:29,845 INFO L87 Difference]: Start difference. First operand 250 states and 340 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:29,991 INFO L93 Difference]: Finished difference Result 393 states and 520 transitions. [2021-11-20 23:46:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:46:29,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 23:46:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:29,995 INFO L225 Difference]: With dead ends: 393 [2021-11-20 23:46:29,995 INFO L226 Difference]: Without dead ends: 393 [2021-11-20 23:46:29,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:29,996 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 112 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:29,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 375 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:29,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-20 23:46:30,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 270. [2021-11-20 23:46:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 213 states have (on average 1.6431924882629108) internal successors, (350), 257 states have internal predecessors, (350), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 366 transitions. [2021-11-20 23:46:30,005 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 366 transitions. Word has length 17 [2021-11-20 23:46:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:30,005 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 366 transitions. [2021-11-20 23:46:30,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 366 transitions. [2021-11-20 23:46:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:46:30,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:30,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:30,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:46:30,007 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash -263161843, now seen corresponding path program 1 times [2021-11-20 23:46:30,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:30,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972108021] [2021-11-20 23:46:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:30,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:30,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:30,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972108021] [2021-11-20 23:46:30,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972108021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:30,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:30,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:30,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939149833] [2021-11-20 23:46:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:30,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:30,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:30,110 INFO L87 Difference]: Start difference. First operand 270 states and 366 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:30,289 INFO L93 Difference]: Finished difference Result 340 states and 439 transitions. [2021-11-20 23:46:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:46:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 23:46:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:30,291 INFO L225 Difference]: With dead ends: 340 [2021-11-20 23:46:30,291 INFO L226 Difference]: Without dead ends: 340 [2021-11-20 23:46:30,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:30,292 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 161 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:30,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 414 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-20 23:46:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 269. [2021-11-20 23:46:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 213 states have (on average 1.6056338028169015) internal successors, (342), 256 states have internal predecessors, (342), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 358 transitions. [2021-11-20 23:46:30,301 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 358 transitions. Word has length 17 [2021-11-20 23:46:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:30,302 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 358 transitions. [2021-11-20 23:46:30,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 358 transitions. [2021-11-20 23:46:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:46:30,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:30,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:30,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:46:30,303 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash -752677573, now seen corresponding path program 1 times [2021-11-20 23:46:30,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:30,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161168062] [2021-11-20 23:46:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:30,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:30,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:30,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161168062] [2021-11-20 23:46:30,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161168062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:30,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:30,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:46:30,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699004968] [2021-11-20 23:46:30,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:30,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:46:30,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:46:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:46:30,449 INFO L87 Difference]: Start difference. First operand 269 states and 358 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:30,836 INFO L93 Difference]: Finished difference Result 487 states and 632 transitions. [2021-11-20 23:46:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:46:30,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-20 23:46:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:30,840 INFO L225 Difference]: With dead ends: 487 [2021-11-20 23:46:30,840 INFO L226 Difference]: Without dead ends: 487 [2021-11-20 23:46:30,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:46:30,841 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 418 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:30,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 687 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:46:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-20 23:46:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 267. [2021-11-20 23:46:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 213 states have (on average 1.596244131455399) internal successors, (340), 254 states have internal predecessors, (340), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 356 transitions. [2021-11-20 23:46:30,850 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 356 transitions. Word has length 20 [2021-11-20 23:46:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:30,851 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 356 transitions. [2021-11-20 23:46:30,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 356 transitions. [2021-11-20 23:46:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:46:30,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:30,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:30,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:46:30,853 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:30,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1532799755, now seen corresponding path program 1 times [2021-11-20 23:46:30,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669804465] [2021-11-20 23:46:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:30,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:30,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669804465] [2021-11-20 23:46:30,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669804465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:30,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:30,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:46:30,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248740171] [2021-11-20 23:46:30,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:30,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:30,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:30,901 INFO L87 Difference]: Start difference. First operand 267 states and 356 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:31,033 INFO L93 Difference]: Finished difference Result 335 states and 433 transitions. [2021-11-20 23:46:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-20 23:46:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:31,036 INFO L225 Difference]: With dead ends: 335 [2021-11-20 23:46:31,036 INFO L226 Difference]: Without dead ends: 335 [2021-11-20 23:46:31,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:31,037 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 194 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:31,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 243 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-20 23:46:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 266. [2021-11-20 23:46:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 213 states have (on average 1.5868544600938967) internal successors, (338), 253 states have internal predecessors, (338), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 354 transitions. [2021-11-20 23:46:31,046 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 354 transitions. Word has length 20 [2021-11-20 23:46:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:31,046 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 354 transitions. [2021-11-20 23:46:31,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 354 transitions. [2021-11-20 23:46:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:46:31,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:31,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:31,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 23:46:31,048 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1532799756, now seen corresponding path program 1 times [2021-11-20 23:46:31,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:31,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780008587] [2021-11-20 23:46:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:31,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:31,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780008587] [2021-11-20 23:46:31,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780008587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:31,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:31,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:46:31,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893286913] [2021-11-20 23:46:31,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:31,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:31,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:31,077 INFO L87 Difference]: Start difference. First operand 266 states and 354 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:31,231 INFO L93 Difference]: Finished difference Result 325 states and 420 transitions. [2021-11-20 23:46:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-20 23:46:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:31,234 INFO L225 Difference]: With dead ends: 325 [2021-11-20 23:46:31,234 INFO L226 Difference]: Without dead ends: 325 [2021-11-20 23:46:31,234 INFO L932 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 [2021-11-20 23:46:31,235 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 175 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:31,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 213 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-20 23:46:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 265. [2021-11-20 23:46:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 213 states have (on average 1.5774647887323943) internal successors, (336), 252 states have internal predecessors, (336), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 352 transitions. [2021-11-20 23:46:31,243 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 352 transitions. Word has length 20 [2021-11-20 23:46:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:31,244 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 352 transitions. [2021-11-20 23:46:31,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 352 transitions. [2021-11-20 23:46:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:46:31,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:31,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:31,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 23:46:31,245 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1858165900, now seen corresponding path program 1 times [2021-11-20 23:46:31,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:31,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673112945] [2021-11-20 23:46:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:31,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:31,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673112945] [2021-11-20 23:46:31,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673112945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:31,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:31,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:46:31,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344362551] [2021-11-20 23:46:31,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:31,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:46:31,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:31,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:46:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:31,399 INFO L87 Difference]: Start difference. First operand 265 states and 352 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:31,653 INFO L93 Difference]: Finished difference Result 299 states and 380 transitions. [2021-11-20 23:46:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:46:31,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-20 23:46:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:31,657 INFO L225 Difference]: With dead ends: 299 [2021-11-20 23:46:31,657 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 23:46:31,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:46:31,658 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 82 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:31,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 480 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 23:46:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 265. [2021-11-20 23:46:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 213 states have (on average 1.5727699530516432) internal successors, (335), 252 states have internal predecessors, (335), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:46:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 351 transitions. [2021-11-20 23:46:31,665 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 351 transitions. Word has length 21 [2021-11-20 23:46:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:31,666 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 351 transitions. [2021-11-20 23:46:31,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 351 transitions. [2021-11-20 23:46:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:46:31,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:31,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:31,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 23:46:31,667 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1858301905, now seen corresponding path program 1 times [2021-11-20 23:46:31,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104540683] [2021-11-20 23:46:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:31,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:31,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:31,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104540683] [2021-11-20 23:46:31,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104540683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:31,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:31,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:46:31,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924910167] [2021-11-20 23:46:31,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:31,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:46:31,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:46:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:46:31,857 INFO L87 Difference]: Start difference. First operand 265 states and 351 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:32,427 INFO L93 Difference]: Finished difference Result 468 states and 590 transitions. [2021-11-20 23:46:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:46:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-20 23:46:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:32,430 INFO L225 Difference]: With dead ends: 468 [2021-11-20 23:46:32,430 INFO L226 Difference]: Without dead ends: 468 [2021-11-20 23:46:32,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:46:32,431 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 271 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:32,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 1213 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:46:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-20 23:46:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 232. [2021-11-20 23:46:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 183 states have (on average 1.5901639344262295) internal successors, (291), 222 states have internal predecessors, (291), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:46:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 303 transitions. [2021-11-20 23:46:32,439 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 303 transitions. Word has length 21 [2021-11-20 23:46:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:32,439 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 303 transitions. [2021-11-20 23:46:32,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 303 transitions. [2021-11-20 23:46:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:46:32,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:32,440 INFO L514 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] [2021-11-20 23:46:32,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 23:46:32,440 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 153220245, now seen corresponding path program 1 times [2021-11-20 23:46:32,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197265743] [2021-11-20 23:46:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:32,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:32,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:32,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197265743] [2021-11-20 23:46:32,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197265743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:32,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:32,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:32,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208534055] [2021-11-20 23:46:32,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:32,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:32,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:32,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:32,481 INFO L87 Difference]: Start difference. First operand 232 states and 303 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:32,664 INFO L93 Difference]: Finished difference Result 460 states and 561 transitions. [2021-11-20 23:46:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:46:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-20 23:46:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:32,667 INFO L225 Difference]: With dead ends: 460 [2021-11-20 23:46:32,668 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 23:46:32,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:32,669 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 441 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:32,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 218 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 23:46:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 229. [2021-11-20 23:46:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 183 states have (on average 1.5573770491803278) internal successors, (285), 219 states have internal predecessors, (285), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:46:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 297 transitions. [2021-11-20 23:46:32,678 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 297 transitions. Word has length 22 [2021-11-20 23:46:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:32,678 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 297 transitions. [2021-11-20 23:46:32,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 297 transitions. [2021-11-20 23:46:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:46:32,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:32,679 INFO L514 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] [2021-11-20 23:46:32,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 23:46:32,679 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 153220246, now seen corresponding path program 1 times [2021-11-20 23:46:32,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:32,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44886382] [2021-11-20 23:46:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:32,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:32,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:32,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44886382] [2021-11-20 23:46:32,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44886382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:32,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:32,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:46:32,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896283019] [2021-11-20 23:46:32,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:32,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:46:32,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:46:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:32,760 INFO L87 Difference]: Start difference. First operand 229 states and 297 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:32,963 INFO L93 Difference]: Finished difference Result 338 states and 421 transitions. [2021-11-20 23:46:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:46:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-20 23:46:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:32,965 INFO L225 Difference]: With dead ends: 338 [2021-11-20 23:46:32,965 INFO L226 Difference]: Without dead ends: 338 [2021-11-20 23:46:32,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:46:32,966 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 429 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:32,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 256 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:46:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-20 23:46:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 228. [2021-11-20 23:46:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 183 states have (on average 1.546448087431694) internal successors, (283), 218 states have internal predecessors, (283), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:46:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 295 transitions. [2021-11-20 23:46:32,974 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 295 transitions. Word has length 22 [2021-11-20 23:46:32,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:32,974 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 295 transitions. [2021-11-20 23:46:32,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 295 transitions. [2021-11-20 23:46:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:46:32,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:32,975 INFO L514 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] [2021-11-20 23:46:32,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 23:46:32,976 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash 153220407, now seen corresponding path program 1 times [2021-11-20 23:46:32,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:32,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590508552] [2021-11-20 23:46:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:32,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:33,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590508552] [2021-11-20 23:46:33,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590508552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:33,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:33,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:46:33,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70248590] [2021-11-20 23:46:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:33,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:33,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:33,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:33,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:33,042 INFO L87 Difference]: Start difference. First operand 228 states and 295 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:33,141 INFO L93 Difference]: Finished difference Result 226 states and 291 transitions. [2021-11-20 23:46:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:33,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-20 23:46:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:33,143 INFO L225 Difference]: With dead ends: 226 [2021-11-20 23:46:33,143 INFO L226 Difference]: Without dead ends: 226 [2021-11-20 23:46:33,144 INFO L932 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 [2021-11-20 23:46:33,144 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 209 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:33,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 92 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-20 23:46:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-11-20 23:46:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 183 states have (on average 1.5245901639344261) internal successors, (279), 216 states have internal predecessors, (279), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:46:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2021-11-20 23:46:33,151 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 22 [2021-11-20 23:46:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:33,152 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2021-11-20 23:46:33,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:46:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2021-11-20 23:46:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 23:46:33,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:33,153 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:46:33,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 23:46:33,153 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:33,154 INFO L85 PathProgramCache]: Analyzing trace with hash -144723286, now seen corresponding path program 1 times [2021-11-20 23:46:33,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:33,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880476626] [2021-11-20 23:46:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:33,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:46:34,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:34,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880476626] [2021-11-20 23:46:34,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880476626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:46:34,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015798550] [2021-11-20 23:46:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:34,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:34,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:34,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:46:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 23:46:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:34,998 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:46:34,999 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 11 treesize of output 11 [2021-11-20 23:46:35,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-20 23:46:35,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-20 23:46:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:35,528 INFO L354 Elim1Store]: treesize reduction 56, result has 41.1 percent of original size [2021-11-20 23:46:35,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 102 [2021-11-20 23:46:35,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:35,568 INFO L354 Elim1Store]: treesize reduction 56, result has 41.1 percent of original size [2021-11-20 23:46:35,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 120 [2021-11-20 23:46:35,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:35,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 69 [2021-11-20 23:46:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:35,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 65 [2021-11-20 23:46:35,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:35,984 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-20 23:46:35,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 51 [2021-11-20 23:46:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:35,994 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-20 23:46:35,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 20 [2021-11-20 23:46:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:36,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:46:36,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015798550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:36,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:46:36,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 25 [2021-11-20 23:46:36,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871149192] [2021-11-20 23:46:36,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:36,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:46:36,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:46:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:46:36,059 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:46:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:36,838 INFO L93 Difference]: Finished difference Result 236 states and 301 transitions. [2021-11-20 23:46:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:46:36,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2021-11-20 23:46:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:36,840 INFO L225 Difference]: With dead ends: 236 [2021-11-20 23:46:36,840 INFO L226 Difference]: Without dead ends: 236 [2021-11-20 23:46:36,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-11-20 23:46:36,841 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 26 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:36,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 735 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 407 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2021-11-20 23:46:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-20 23:46:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-11-20 23:46:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 193 states have (on average 1.4974093264248705) internal successors, (289), 226 states have internal predecessors, (289), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:46:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 301 transitions. [2021-11-20 23:46:36,856 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 301 transitions. Word has length 34 [2021-11-20 23:46:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:36,856 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 301 transitions. [2021-11-20 23:46:36,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:46:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 301 transitions. [2021-11-20 23:46:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:46:36,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:36,857 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:46:36,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:37,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:37,085 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:46:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash -253132181, now seen corresponding path program 1 times [2021-11-20 23:46:37,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:37,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982327455] [2021-11-20 23:46:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:37,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:46:38,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:38,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982327455] [2021-11-20 23:46:38,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982327455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:46:38,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758701618] [2021-11-20 23:46:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:38,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:38,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:38,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:46:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:38,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-20 23:46:38,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:38,856 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:46:38,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 23:46:39,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:46:39,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:46:39,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:46:39,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:46:39,327 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 23:46:39,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 46 [2021-11-20 23:46:39,346 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 23:46:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 41 [2021-11-20 23:46:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:39,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 81 [2021-11-20 23:46:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:39,658 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-20 23:46:39,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 61 [2021-11-20 23:46:39,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:39,797 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2021-11-20 23:46:40,352 INFO L354 Elim1Store]: treesize reduction 88, result has 31.8 percent of original size [2021-11-20 23:46:40,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 114 [2021-11-20 23:46:40,859 INFO L354 Elim1Store]: treesize reduction 97, result has 3.0 percent of original size [2021-11-20 23:46:40,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 73 [2021-11-20 23:46:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:40,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:41,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758701618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:46:41,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001798986] [2021-11-20 23:46:41,314 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-20 23:46:41,314 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:41,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:41,323 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:41,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:42,090 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:46:42,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:46:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:45,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:45,057 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:46:45,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:46:45,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:45,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:45,099 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:46:45,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-20 23:46:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:45,125 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:46:45,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-20 23:46:46,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,072 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:46:46,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:46:46,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:46,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,140 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:46:46,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 278 treesize of output 276 [2021-11-20 23:46:46,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,182 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:46:46,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-20 23:46:47,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,092 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:46:47,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 288 treesize of output 286 [2021-11-20 23:46:47,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 267 [2021-11-20 23:46:47,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:47,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,184 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:46:47,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 269 treesize of output 276 [2021-11-20 23:46:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:48,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:46:48,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:48,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:48,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:48,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:48,920 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:46:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 255 treesize of output 254 [2021-11-20 23:46:48,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:48,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:48,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:48,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:48,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:49,019 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-20 23:46:49,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 251 treesize of output 259 [2021-11-20 23:46:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:46:51,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:51,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:46:52,547 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-20 23:46:52,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 581 treesize of output 584 [2021-11-20 23:47:05,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:05,669 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:47:05,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 242 [2021-11-20 23:47:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:05,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:05,709 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:47:05,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 239 [2021-11-20 23:47:05,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:05,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:05,761 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:47:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:47:06,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:06,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:06,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:06,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:06,525 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-20 23:47:06,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 276 [2021-11-20 23:47:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:06,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:06,569 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:47:06,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 268 treesize of output 263 [2021-11-20 23:47:06,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:06,600 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:47:06,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 239 [2021-11-20 23:47:07,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:07,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 255 [2021-11-20 23:47:07,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:07,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:07,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:07,475 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:47:07,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 257 treesize of output 255 [2021-11-20 23:47:07,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:07,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:07,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:07,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:07,534 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-20 23:47:07,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 267 [2021-11-20 23:47:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:08,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:08,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:08,864 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:47:08,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 275 treesize of output 274 [2021-11-20 23:47:08,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 246 [2021-11-20 23:47:08,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:08,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:08,960 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-20 23:47:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 248 treesize of output 256 [2021-11-20 23:47:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:12,946 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-20 23:47:12,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 45 [2021-11-20 23:47:13,879 INFO L354 Elim1Store]: treesize reduction 94, result has 20.3 percent of original size [2021-11-20 23:47:13,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 200 treesize of output 210 [2021-11-20 23:47:15,326 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:47:15,518 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:47:16,386 INFO L354 Elim1Store]: treesize reduction 94, result has 20.3 percent of original size [2021-11-20 23:47:16,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 200 treesize of output 210 [2021-11-20 23:47:17,120 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 121 for LOIs [2021-11-20 23:47:18,029 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:47:24,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:47:24,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:47:24,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 26 [2021-11-20 23:47:24,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481089719] [2021-11-20 23:47:24,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:47:24,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 23:47:24,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:47:24,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 23:47:24,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2434, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 23:47:24,633 INFO L87 Difference]: Start difference. First operand 236 states and 301 transitions. Second operand has 27 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:47:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:47:25,779 INFO L93 Difference]: Finished difference Result 298 states and 373 transitions. [2021-11-20 23:47:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 23:47:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2021-11-20 23:47:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:47:25,782 INFO L225 Difference]: With dead ends: 298 [2021-11-20 23:47:25,782 INFO L226 Difference]: Without dead ends: 298 [2021-11-20 23:47:25,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=393, Invalid=3029, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 23:47:25,784 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 227 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:47:25,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1007 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 777 Invalid, 0 Unknown, 110 Unchecked, 0.6s Time] [2021-11-20 23:47:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-20 23:47:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 262. [2021-11-20 23:47:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 216 states have (on average 1.4814814814814814) internal successors, (320), 249 states have internal predecessors, (320), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:47:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 336 transitions. [2021-11-20 23:47:25,793 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 336 transitions. Word has length 35 [2021-11-20 23:47:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:47:25,794 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 336 transitions. [2021-11-20 23:47:25,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:47:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 336 transitions. [2021-11-20 23:47:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:47:25,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:47:25,795 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:47:25,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:47:26,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 23:47:26,021 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:47:26,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:47:26,022 INFO L85 PathProgramCache]: Analyzing trace with hash -253132180, now seen corresponding path program 1 times [2021-11-20 23:47:26,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:47:26,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647833358] [2021-11-20 23:47:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:26,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:47:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:47:27,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:47:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647833358] [2021-11-20 23:47:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647833358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:47:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363900549] [2021-11-20 23:47:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:27,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:47:27,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:47:27,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:47:27,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:47:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:27,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-20 23:47:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:47:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:47:28,096 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:47:28,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 23:47:28,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2021-11-20 23:47:28,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-20 23:47:29,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2021-11-20 23:47:29,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 61 [2021-11-20 23:47:29,334 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 23:47:29,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 74 [2021-11-20 23:47:29,351 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 23:47:29,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 70 [2021-11-20 23:47:29,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:29,666 INFO L354 Elim1Store]: treesize reduction 57, result has 26.0 percent of original size [2021-11-20 23:47:29,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 116 [2021-11-20 23:47:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:29,683 INFO L354 Elim1Store]: treesize reduction 57, result has 26.0 percent of original size [2021-11-20 23:47:29,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 124 [2021-11-20 23:47:30,476 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-20 23:47:30,477 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 1 case distinctions, treesize of input 39 treesize of output 41 [2021-11-20 23:47:30,495 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-20 23:47:30,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2021-11-20 23:47:30,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:30,848 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-20 23:47:30,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 105 [2021-11-20 23:47:30,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:30,862 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-11-20 23:47:30,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 85 [2021-11-20 23:47:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:47:30,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:31,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363900549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:47:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978211757] [2021-11-20 23:47:31,661 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-20 23:47:31,661 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:47:31,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:47:31,662 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:47:31,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:47:32,483 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:47:32,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:47:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,032 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:47:35,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:47:35,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,057 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:47:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:47:35,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:35,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,109 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:47:35,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:47:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,919 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:47:35,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:47:35,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:35,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:35,995 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-20 23:47:35,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 278 treesize of output 272 [2021-11-20 23:47:36,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:36,030 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:47:36,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 239 [2021-11-20 23:47:37,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:37,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:37,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:37,236 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:47:37,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 272 treesize of output 270 [2021-11-20 23:47:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:37,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 251 [2021-11-20 23:47:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:37,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:37,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:37,334 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-20 23:47:37,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 267 [2021-11-20 23:47:39,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:39,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:39,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:39,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:39,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:39,068 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:47:39,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 272 treesize of output 275 [2021-11-20 23:47:39,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 235 [2021-11-20 23:47:39,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:39,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:39,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:39,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:39,183 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-20 23:47:39,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 237 treesize of output 245 [2021-11-20 23:47:41,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:41,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-20 23:47:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:41,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:47:42,537 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-20 23:47:42,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 581 treesize of output 584 [2021-11-20 23:47:58,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:58,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,044 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:47:58,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:47:58,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,072 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:47:58,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:47:58,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:58,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,110 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:47:58,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:47:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,810 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:47:58,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:47:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:58,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,869 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:47:58,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 278 treesize of output 276 [2021-11-20 23:47:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:58,894 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:47:58,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-20 23:47:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:59,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:59,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:59,961 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:47:59,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 288 treesize of output 286 [2021-11-20 23:47:59,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:59,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:47:59,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:59,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:00,034 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:48:00,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 284 treesize of output 291 [2021-11-20 23:48:00,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:00,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 262 [2021-11-20 23:48:01,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:01,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:01,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:01,668 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:48:01,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 278 treesize of output 281 [2021-11-20 23:48:01,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:01,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:01,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:01,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:01,742 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-20 23:48:01,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 266 treesize of output 277 [2021-11-20 23:48:01,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:01,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 246 [2021-11-20 23:48:05,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:05,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:48:05,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:05,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:48:06,347 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:48:06,569 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:48:08,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:08,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:08,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:08,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:48:08,267 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 90 for LOIs [2021-11-20 23:48:08,462 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:48:16,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:48:16,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:48:16,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-11-20 23:48:16,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95630944] [2021-11-20 23:48:16,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:48:16,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 23:48:16,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:48:16,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 23:48:16,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2848, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 23:48:16,183 INFO L87 Difference]: Start difference. First operand 262 states and 336 transitions. Second operand has 28 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:48:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:17,915 INFO L93 Difference]: Finished difference Result 299 states and 373 transitions. [2021-11-20 23:48:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 23:48:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-11-20 23:48:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:17,923 INFO L225 Difference]: With dead ends: 299 [2021-11-20 23:48:17,923 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 23:48:17,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=426, Invalid=3606, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 23:48:17,924 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 239 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:17,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1177 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1278 Invalid, 0 Unknown, 75 Unchecked, 1.0s Time] [2021-11-20 23:48:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 23:48:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 262. [2021-11-20 23:48:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 216 states have (on average 1.4768518518518519) internal successors, (319), 249 states have internal predecessors, (319), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:48:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 335 transitions. [2021-11-20 23:48:17,932 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 335 transitions. Word has length 35 [2021-11-20 23:48:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:48:17,932 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 335 transitions. [2021-11-20 23:48:17,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 23:48:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 335 transitions. [2021-11-20 23:48:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:48:17,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:17,934 INFO L514 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] [2021-11-20 23:48:17,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:48:18,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 23:48:18,146 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:48:18,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1368485076, now seen corresponding path program 1 times [2021-11-20 23:48:18,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:18,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28091532] [2021-11-20 23:48:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:18,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:48:18,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:48:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28091532] [2021-11-20 23:48:18,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28091532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:48:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329498955] [2021-11-20 23:48:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:18,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:48:18,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:48:18,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:48:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:18,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 23:48:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:48:19,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2021-11-20 23:48:19,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-11-20 23:48:19,642 INFO L354 Elim1Store]: treesize reduction 106, result has 24.8 percent of original size [2021-11-20 23:48:19,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 118 treesize of output 126 [2021-11-20 23:48:19,670 INFO L354 Elim1Store]: treesize reduction 74, result has 47.5 percent of original size [2021-11-20 23:48:19,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 126 treesize of output 166 [2021-11-20 23:48:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:19,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:48:20,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 68 [2021-11-20 23:48:20,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:48:20,005 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 65 treesize of output 65 [2021-11-20 23:48:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:48:20,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:48:20,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329498955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:48:20,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:48:20,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 20 [2021-11-20 23:48:20,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784335660] [2021-11-20 23:48:20,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:48:20,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:48:20,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:48:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:48:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:48:20,075 INFO L87 Difference]: Start difference. First operand 262 states and 335 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:48:21,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:21,043 INFO L93 Difference]: Finished difference Result 725 states and 902 transitions. [2021-11-20 23:48:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 23:48:21,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-20 23:48:21,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:21,047 INFO L225 Difference]: With dead ends: 725 [2021-11-20 23:48:21,047 INFO L226 Difference]: Without dead ends: 725 [2021-11-20 23:48:21,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 23:48:21,049 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 569 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:21,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 877 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 538 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2021-11-20 23:48:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-20 23:48:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 434. [2021-11-20 23:48:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 376 states have (on average 1.4734042553191489) internal successors, (554), 411 states have internal predecessors, (554), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:48:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 586 transitions. [2021-11-20 23:48:21,066 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 586 transitions. Word has length 35 [2021-11-20 23:48:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:48:21,067 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 586 transitions. [2021-11-20 23:48:21,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:48:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 586 transitions. [2021-11-20 23:48:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:48:21,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:48:21,068 INFO L514 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] [2021-11-20 23:48:21,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:48:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:21,291 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:48:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:48:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1368486547, now seen corresponding path program 1 times [2021-11-20 23:48:21,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:48:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921345411] [2021-11-20 23:48:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:21,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:48:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:48:22,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:48:22,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921345411] [2021-11-20 23:48:22,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921345411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:48:22,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604156068] [2021-11-20 23:48:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:48:22,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:48:22,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:48:22,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:48:22,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:48:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:48:22,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 23:48:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:48:22,478 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:48:22,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 23:48:22,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:48:22,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:48:22,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:48:22,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:48:22,843 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-20 23:48:22,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 63 [2021-11-20 23:48:22,855 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-20 23:48:22,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 57 [2021-11-20 23:48:23,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:23,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 109 [2021-11-20 23:48:23,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:23,115 INFO L354 Elim1Store]: treesize reduction 59, result has 18.1 percent of original size [2021-11-20 23:48:23,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 77 [2021-11-20 23:48:23,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:23,244 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-11-20 23:48:23,576 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 23:48:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 61 treesize of output 26 [2021-11-20 23:48:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:48:23,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:48:37,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604156068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:48:37,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [402495339] [2021-11-20 23:48:37,699 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-11-20 23:48:37,699 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:48:37,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:48:37,700 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:48:37,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:48:39,134 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:48:39,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:48:42,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:42,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:42,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:42,041 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:48:42,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:48:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:42,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:42,105 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:48:42,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-20 23:48:42,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:42,134 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:48:42,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-20 23:48:43,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:43,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:43,044 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:48:43,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:48:43,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:43,071 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:48:43,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:48:43,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:43,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:43,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:43,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:43,127 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:48:43,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 255 treesize of output 253 [2021-11-20 23:48:44,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:44,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:44,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:44,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:44,233 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:48:44,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 288 treesize of output 295 [2021-11-20 23:48:44,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:44,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:44,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:44,294 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:48:44,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 283 treesize of output 281 [2021-11-20 23:48:44,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:44,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 262 [2021-11-20 23:48:45,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:45,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:45,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:45,886 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:48:45,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 276 treesize of output 279 [2021-11-20 23:48:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:45,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 239 [2021-11-20 23:48:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:45,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:45,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:48:45,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:45,985 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-20 23:48:45,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 241 treesize of output 252 [2021-11-20 23:48:52,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:52,939 INFO L354 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2021-11-20 23:48:52,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2021-11-20 23:48:53,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:53,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:48:53,477 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-20 23:48:53,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 45 [2021-11-20 23:48:54,047 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-20 23:48:54,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 541 treesize of output 544 [2021-11-20 23:49:04,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:04,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:04,400 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:49:04,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:49:04,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:04,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:04,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:04,444 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:49:04,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-20 23:49:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:04,484 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:49:04,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-20 23:49:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:05,416 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:49:05,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:49:05,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:05,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:05,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:05,487 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-20 23:49:05,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 278 treesize of output 272 [2021-11-20 23:49:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:05,511 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:49:05,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 251 [2021-11-20 23:49:06,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:06,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:06,388 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:49:06,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 290 treesize of output 288 [2021-11-20 23:49:06,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:06,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:06,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:06,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:06,454 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-20 23:49:06,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 286 treesize of output 288 [2021-11-20 23:49:06,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:06,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 262 [2021-11-20 23:49:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:08,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:08,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:08,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:08,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:08,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:08,098 INFO L354 Elim1Store]: treesize reduction 258, result has 16.0 percent of original size [2021-11-20 23:49:08,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 289 treesize of output 300 [2021-11-20 23:49:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:08,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:08,165 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:49:08,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 285 treesize of output 284 [2021-11-20 23:49:08,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:08,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 256 [2021-11-20 23:49:15,790 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:49:15,958 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:49:16,337 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-20 23:49:16,365 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:49:22,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:49:22,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:49:22,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2021-11-20 23:49:22,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395967769] [2021-11-20 23:49:22,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:49:22,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 23:49:22,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:49:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 23:49:22,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2601, Unknown=4, NotChecked=0, Total=2970 [2021-11-20 23:49:22,141 INFO L87 Difference]: Start difference. First operand 434 states and 586 transitions. Second operand has 22 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:49:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:49:23,699 INFO L93 Difference]: Finished difference Result 493 states and 650 transitions. [2021-11-20 23:49:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 23:49:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-20 23:49:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:49:23,703 INFO L225 Difference]: With dead ends: 493 [2021-11-20 23:49:23,703 INFO L226 Difference]: Without dead ends: 493 [2021-11-20 23:49:23,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=511, Invalid=3907, Unknown=4, NotChecked=0, Total=4422 [2021-11-20 23:49:23,706 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:49:23,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1359 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1202 Invalid, 0 Unknown, 274 Unchecked, 0.8s Time] [2021-11-20 23:49:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-20 23:49:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 437. [2021-11-20 23:49:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 380 states have (on average 1.4684210526315788) internal successors, (558), 414 states have internal predecessors, (558), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:49:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 590 transitions. [2021-11-20 23:49:23,722 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 590 transitions. Word has length 35 [2021-11-20 23:49:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:49:23,723 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 590 transitions. [2021-11-20 23:49:23,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:49:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 590 transitions. [2021-11-20 23:49:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:49:23,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:23,724 INFO L514 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] [2021-11-20 23:49:23,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 23:49:23,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:23,938 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:49:23,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1368486546, now seen corresponding path program 1 times [2021-11-20 23:49:23,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:49:23,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497106709] [2021-11-20 23:49:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:23,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:49:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:49:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:49:24,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:49:24,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497106709] [2021-11-20 23:49:24,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497106709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:49:24,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058311872] [2021-11-20 23:49:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:24,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:49:25,001 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:49:25,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:49:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:49:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 23:49:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:49:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:49:25,205 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:49:25,205 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 11 treesize of output 11 [2021-11-20 23:49:25,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:49:25,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:49:25,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:49:25,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:49:25,535 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 23:49:25,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 46 [2021-11-20 23:49:25,545 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 23:49:25,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-11-20 23:49:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:25,742 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-20 23:49:25,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 77 [2021-11-20 23:49:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:25,753 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-20 23:49:25,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 81 [2021-11-20 23:49:26,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:26,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:26,253 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-20 23:49:26,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 63 [2021-11-20 23:49:26,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:26,270 INFO L354 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2021-11-20 23:49:26,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 41 [2021-11-20 23:49:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:49:26,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:49:42,342 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 323 treesize of output 288 [2021-11-20 23:49:43,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058311872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:49:43,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627471816] [2021-11-20 23:49:43,323 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-11-20 23:49:43,323 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:49:43,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:49:43,324 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:49:43,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:49:45,202 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:49:45,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:49:48,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:48,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:48,083 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:49:48,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:49:48,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:48,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:48,148 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:49:48,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-20 23:49:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:48,175 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:49:48,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-20 23:49:49,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:49,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,412 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-20 23:49:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 276 [2021-11-20 23:49:49,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,447 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:49:49,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 255 [2021-11-20 23:49:49,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:49,500 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:49:49,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 252 [2021-11-20 23:49:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,419 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:49:50,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 290 treesize of output 288 [2021-11-20 23:49:50,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 269 [2021-11-20 23:49:50,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:50,503 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-20 23:49:50,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 271 treesize of output 273 [2021-11-20 23:49:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 264 [2021-11-20 23:49:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:52,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:52,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,544 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:49:52,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 266 treesize of output 269 [2021-11-20 23:49:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:52,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:52,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:49:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:52,658 INFO L354 Elim1Store]: treesize reduction 255, result has 16.9 percent of original size [2021-11-20 23:49:52,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 254 treesize of output 268 [2021-11-20 23:50:01,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:01,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:01,249 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-20 23:50:01,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 45 [2021-11-20 23:50:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:02,010 INFO L354 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2021-11-20 23:50:02,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2021-11-20 23:50:02,682 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-20 23:50:02,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 557 treesize of output 560 [2021-11-20 23:50:17,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:17,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:17,286 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:50:17,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:50:17,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:17,316 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:50:17,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:50:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:17,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:17,361 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:50:17,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:50:18,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:18,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:18,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:18,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:18,421 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:50:18,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 280 [2021-11-20 23:50:18,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:18,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:18,468 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:50:18,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 278 treesize of output 273 [2021-11-20 23:50:18,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:18,495 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:50:18,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-20 23:50:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:19,619 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:50:19,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 288 treesize of output 295 [2021-11-20 23:50:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:19,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 266 [2021-11-20 23:50:19,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:19,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:19,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:19,758 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:50:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 268 treesize of output 266 [2021-11-20 23:50:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:21,866 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:50:21,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 278 treesize of output 281 [2021-11-20 23:50:21,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:21,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 241 [2021-11-20 23:50:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:21,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:21,991 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-20 23:50:21,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 243 treesize of output 251 [2021-11-20 23:50:33,048 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:50:33,233 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:50:33,596 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 16 for LOIs [2021-11-20 23:50:33,629 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:50:43,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [627471816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:50:43,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:50:43,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [11, 8] total 42 [2021-11-20 23:50:43,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809972604] [2021-11-20 23:50:43,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:50:43,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 23:50:43,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:50:43,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 23:50:43,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2412, Unknown=4, NotChecked=0, Total=2756 [2021-11-20 23:50:43,270 INFO L87 Difference]: Start difference. First operand 437 states and 590 transitions. Second operand has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:50:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:50:53,672 INFO L93 Difference]: Finished difference Result 669 states and 869 transitions. [2021-11-20 23:50:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 23:50:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-20 23:50:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:50:53,685 INFO L225 Difference]: With dead ends: 669 [2021-11-20 23:50:53,685 INFO L226 Difference]: Without dead ends: 669 [2021-11-20 23:50:53,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=478, Invalid=4074, Unknown=4, NotChecked=0, Total=4556 [2021-11-20 23:50:53,688 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 378 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:50:53,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 388 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:50:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-20 23:50:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 452. [2021-11-20 23:50:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 396 states have (on average 1.4444444444444444) internal successors, (572), 429 states have internal predecessors, (572), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:50:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 604 transitions. [2021-11-20 23:50:53,720 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 604 transitions. Word has length 35 [2021-11-20 23:50:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:50:53,721 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 604 transitions. [2021-11-20 23:50:53,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:50:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 604 transitions. [2021-11-20 23:50:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:50:53,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:50:53,722 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:50:53,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:50:53,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:50:53,936 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:50:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:50:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1092746542, now seen corresponding path program 1 times [2021-11-20 23:50:53,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:50:53,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528598573] [2021-11-20 23:50:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:50:53,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:50:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:50:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:50:54,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:50:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528598573] [2021-11-20 23:50:54,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528598573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:50:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953277128] [2021-11-20 23:50:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:50:54,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:50:54,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:50:54,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:50:54,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:50:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:50:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 23:50:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:50:54,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 23:50:54,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:54,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-11-20 23:50:54,938 INFO L354 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2021-11-20 23:50:54,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-11-20 23:50:55,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:55,096 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-20 23:50:55,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 46 [2021-11-20 23:50:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:50:55,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:50:55,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953277128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:50:55,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330349086] [2021-11-20 23:50:55,289 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 23:50:55,289 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:50:55,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:50:55,290 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:50:55,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:50:56,006 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:50:56,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:50:59,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:59,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:59,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:59,250 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:50:59,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:50:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:59,281 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:50:59,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:50:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:59,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:59,332 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:50:59,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:51:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,594 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:51:00,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:51:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,663 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-20 23:51:00,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 278 treesize of output 272 [2021-11-20 23:51:00,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:00,691 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:51:00,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 239 [2021-11-20 23:51:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:01,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,651 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:51:01,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 272 treesize of output 270 [2021-11-20 23:51:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 251 [2021-11-20 23:51:01,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:01,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:01,747 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-20 23:51:01,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 267 [2021-11-20 23:51:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:03,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:03,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:03,510 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-20 23:51:03,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 272 treesize of output 280 [2021-11-20 23:51:03,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:03,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 243 [2021-11-20 23:51:03,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:03,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:03,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:03,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:03,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:03,614 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:51:03,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 245 treesize of output 244 [2021-11-20 23:51:05,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-20 23:51:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:05,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:05,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:05,322 INFO L354 Elim1Store]: treesize reduction 104, result has 20.6 percent of original size [2021-11-20 23:51:05,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 71 [2021-11-20 23:51:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:05,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 53 [2021-11-20 23:51:07,190 INFO L354 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2021-11-20 23:51:07,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 174 [2021-11-20 23:51:07,797 INFO L354 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2021-11-20 23:51:07,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 174 [2021-11-20 23:51:08,552 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-11-20 23:51:08,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 596 treesize of output 598 [2021-11-20 23:51:33,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:33,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:33,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:33,348 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:51:33,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:51:33,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:33,383 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:51:33,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:51:33,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:33,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:33,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:33,451 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:51:33,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:51:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:34,426 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:51:34,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:51:34,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:34,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:34,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:34,505 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:51:34,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 278 treesize of output 276 [2021-11-20 23:51:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:34,537 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:51:34,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-20 23:51:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:35,964 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:51:35,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 288 treesize of output 295 [2021-11-20 23:51:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:35,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 266 [2021-11-20 23:51:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:35,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:36,051 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:51:36,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 268 treesize of output 266 [2021-11-20 23:51:37,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:37,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:37,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:38,001 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-20 23:51:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 279 treesize of output 290 [2021-11-20 23:51:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 259 [2021-11-20 23:51:38,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:38,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:38,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:38,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:38,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:38,100 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:51:38,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 261 treesize of output 264 [2021-11-20 23:51:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:39,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-20 23:51:40,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:40,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:40,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:40,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:40,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:40,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:40,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:40,030 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 23:51:40,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 51 [2021-11-20 23:51:40,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:40,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:40,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:40,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:40,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:40,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:40,260 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 23:51:40,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 53 [2021-11-20 23:51:42,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:42,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-20 23:51:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-20 23:51:44,043 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:51:44,315 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:51:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:45,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:45,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-20 23:51:45,448 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 91 for LOIs [2021-11-20 23:51:45,702 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:51:53,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:51:53,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:51:53,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2021-11-20 23:51:53,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092605829] [2021-11-20 23:51:53,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:51:53,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 23:51:53,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 23:51:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1916, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 23:51:53,994 INFO L87 Difference]: Start difference. First operand 452 states and 604 transitions. Second operand has 21 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:51:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:55,398 INFO L93 Difference]: Finished difference Result 734 states and 970 transitions. [2021-11-20 23:51:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 23:51:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-20 23:51:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:55,404 INFO L225 Difference]: With dead ends: 734 [2021-11-20 23:51:55,404 INFO L226 Difference]: Without dead ends: 734 [2021-11-20 23:51:55,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=510, Invalid=2912, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 23:51:55,407 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 755 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:55,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1102 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 951 Invalid, 0 Unknown, 175 Unchecked, 0.8s Time] [2021-11-20 23:51:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-20 23:51:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 531. [2021-11-20 23:51:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 466 states have (on average 1.4399141630901287) internal successors, (671), 498 states have internal predecessors, (671), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 23:51:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 715 transitions. [2021-11-20 23:51:55,433 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 715 transitions. Word has length 36 [2021-11-20 23:51:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:55,434 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 715 transitions. [2021-11-20 23:51:55,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:51:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 715 transitions. [2021-11-20 23:51:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:51:55,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:55,435 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:51:55,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:51:55,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:55,657 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:51:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:55,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1092746541, now seen corresponding path program 1 times [2021-11-20 23:51:55,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:55,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127336603] [2021-11-20 23:51:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:55,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:51:56,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:56,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127336603] [2021-11-20 23:51:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127336603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:51:56,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156713337] [2021-11-20 23:51:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:56,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:51:56,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:51:56,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:51:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-20 23:51:56,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:51:56,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:51:56,627 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:51:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 23:51:56,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 23:51:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-20 23:51:57,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 33 [2021-11-20 23:51:57,577 INFO L354 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2021-11-20 23:51:57,578 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 175 treesize of output 177 [2021-11-20 23:51:57,596 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-11-20 23:51:57,597 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 174 treesize of output 174 [2021-11-20 23:51:58,352 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:51:58,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 177 treesize of output 113 [2021-11-20 23:51:58,359 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-20 23:51:58,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 110 treesize of output 76 [2021-11-20 23:51:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:58,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:51:59,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156713337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:51:59,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237892704] [2021-11-20 23:51:59,148 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 23:51:59,149 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:51:59,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:51:59,149 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:51:59,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:52:00,100 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:52:00,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:52:03,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:03,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:03,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:03,393 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:52:03,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:52:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:03,427 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:52:03,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:52:03,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:03,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:03,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:03,480 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:52:03,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:52:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:04,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:04,584 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:52:04,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:52:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:04,616 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:52:04,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:52:04,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:04,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:04,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:04,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:04,698 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:52:04,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 255 treesize of output 253 [2021-11-20 23:52:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:05,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:05,837 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:52:05,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 288 treesize of output 295 [2021-11-20 23:52:05,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:05,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:05,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:05,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:05,924 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:52:05,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 283 treesize of output 281 [2021-11-20 23:52:05,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:05,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 262 [2021-11-20 23:52:08,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:08,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:08,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:08,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:08,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:08,240 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:52:08,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 278 treesize of output 277 [2021-11-20 23:52:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:08,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:08,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:08,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:08,384 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-20 23:52:08,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 262 treesize of output 273 [2021-11-20 23:52:08,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:08,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 242 [2021-11-20 23:52:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:10,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:10,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:10,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:10,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:10,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:10,203 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 23:52:10,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 53 [2021-11-20 23:52:10,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:10,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-20 23:52:10,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:10,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:10,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:10,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:10,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 53 [2021-11-20 23:52:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:12,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-20 23:52:12,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:12,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:12,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-20 23:52:13,530 INFO L354 Elim1Store]: treesize reduction 126, result has 17.1 percent of original size [2021-11-20 23:52:13,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 584 treesize of output 588 [2021-11-20 23:52:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:36,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:37,025 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:52:37,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:52:37,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:37,067 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:52:37,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:52:37,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:37,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:37,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:37,137 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:52:37,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:52:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:38,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:38,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:38,366 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:52:38,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 280 [2021-11-20 23:52:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:38,408 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:52:38,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:52:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:38,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:38,458 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:52:38,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 250 [2021-11-20 23:52:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:39,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:39,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:39,719 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:52:39,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 288 treesize of output 286 [2021-11-20 23:52:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:39,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:39,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:39,819 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:52:39,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 284 treesize of output 291 [2021-11-20 23:52:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:39,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 262 [2021-11-20 23:52:41,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:41,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 251 [2021-11-20 23:52:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:41,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:41,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:41,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,046 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:52:42,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 253 treesize of output 252 [2021-11-20 23:52:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,169 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-20 23:52:42,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 237 treesize of output 248 [2021-11-20 23:52:43,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:43,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-20 23:52:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:43,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:43,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:43,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:43,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:43,953 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 23:52:43,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 53 [2021-11-20 23:52:44,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:44,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:44,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:44,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:44,088 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 23:52:44,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 53 [2021-11-20 23:52:46,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:46,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-20 23:52:47,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:47,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-20 23:52:48,576 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:52:48,594 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:52:50,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:50,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:50,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-20 23:52:50,596 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 91 for LOIs [2021-11-20 23:52:50,856 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:52:59,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:52:59,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:52:59,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2021-11-20 23:52:59,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757956157] [2021-11-20 23:52:59,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:52:59,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 23:52:59,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:59,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 23:52:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2111, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 23:52:59,730 INFO L87 Difference]: Start difference. First operand 531 states and 715 transitions. Second operand has 21 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:53:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:53:02,422 INFO L93 Difference]: Finished difference Result 915 states and 1199 transitions. [2021-11-20 23:53:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 23:53:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-20 23:53:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:53:02,427 INFO L225 Difference]: With dead ends: 915 [2021-11-20 23:53:02,428 INFO L226 Difference]: Without dead ends: 915 [2021-11-20 23:53:02,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=659, Invalid=4033, Unknown=0, NotChecked=0, Total=4692 [2021-11-20 23:53:02,430 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1038 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:02,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1234 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1314 Invalid, 0 Unknown, 143 Unchecked, 1.2s Time] [2021-11-20 23:53:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-11-20 23:53:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 602. [2021-11-20 23:53:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 531 states have (on average 1.448210922787194) internal successors, (769), 564 states have internal predecessors, (769), 26 states have call successors, (26), 13 states have call predecessors, (26), 13 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 23:53:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 821 transitions. [2021-11-20 23:53:02,458 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 821 transitions. Word has length 36 [2021-11-20 23:53:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:02,459 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 821 transitions. [2021-11-20 23:53:02,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 23:53:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 821 transitions. [2021-11-20 23:53:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:53:02,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:02,460 INFO L514 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] [2021-11-20 23:53:02,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:53:02,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 23:53:02,676 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:53:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2086867859, now seen corresponding path program 1 times [2021-11-20 23:53:02,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:53:02,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634390590] [2021-11-20 23:53:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:02,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:53:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:03,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:53:03,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634390590] [2021-11-20 23:53:03,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634390590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:53:03,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:53:03,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 23:53:03,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856789004] [2021-11-20 23:53:03,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:53:03,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:53:03,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:53:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:53:03,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:53:03,094 INFO L87 Difference]: Start difference. First operand 602 states and 821 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:53:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:53:03,786 INFO L93 Difference]: Finished difference Result 796 states and 1051 transitions. [2021-11-20 23:53:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:53:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-11-20 23:53:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:53:03,792 INFO L225 Difference]: With dead ends: 796 [2021-11-20 23:53:03,792 INFO L226 Difference]: Without dead ends: 796 [2021-11-20 23:53:03,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:53:03,793 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 507 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 617 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:53:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-11-20 23:53:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 602. [2021-11-20 23:53:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 531 states have (on average 1.448210922787194) internal successors, (769), 564 states have internal predecessors, (769), 26 states have call successors, (26), 13 states have call predecessors, (26), 13 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 23:53:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 821 transitions. [2021-11-20 23:53:03,818 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 821 transitions. Word has length 36 [2021-11-20 23:53:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:03,819 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 821 transitions. [2021-11-20 23:53:03,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:53:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 821 transitions. [2021-11-20 23:53:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 23:53:03,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:03,820 INFO L514 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] [2021-11-20 23:53:03,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 23:53:03,820 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:53:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1680398164, now seen corresponding path program 1 times [2021-11-20 23:53:03,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:53:03,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550041278] [2021-11-20 23:53:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:03,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:53:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:53:04,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:53:04,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550041278] [2021-11-20 23:53:04,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550041278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:53:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728564337] [2021-11-20 23:53:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:04,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:53:04,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:53:04,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:53:04,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:53:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 23:53:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:04,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 23:53:05,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:05,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:05,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:53:05,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 142 [2021-11-20 23:53:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:05,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:53:05,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 132 [2021-11-20 23:53:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:05,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:06,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:06,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:53:06,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 128 [2021-11-20 23:53:06,263 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 65 treesize of output 52 [2021-11-20 23:53:06,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:06,276 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-20 23:53:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:53:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728564337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:53:06,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936474708] [2021-11-20 23:53:06,608 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-20 23:53:06,608 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:53:06,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:53:06,609 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:53:06,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:53:07,579 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:53:07,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:53:10,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:10,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:11,014 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:53:11,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:53:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:11,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:11,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:11,081 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:53:11,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-20 23:53:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:11,116 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:53:11,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-20 23:53:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:12,249 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:53:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:53:12,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:12,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:12,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:12,332 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:53:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 278 treesize of output 276 [2021-11-20 23:53:12,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:12,364 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:53:12,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 249 [2021-11-20 23:53:13,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:13,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:13,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:13,717 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:53:13,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 288 treesize of output 286 [2021-11-20 23:53:13,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:13,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:13,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:13,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:13,815 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:53:13,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 284 treesize of output 291 [2021-11-20 23:53:13,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:13,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 262 [2021-11-20 23:53:15,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:15,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:15,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:15,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:16,044 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:53:16,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 276 treesize of output 275 [2021-11-20 23:53:16,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 247 [2021-11-20 23:53:16,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:16,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:16,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:16,154 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-20 23:53:16,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 249 treesize of output 260 [2021-11-20 23:53:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:19,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:53:19,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:19,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:19,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:19,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:53:20,426 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-20 23:53:20,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 563 treesize of output 566 [2021-11-20 23:53:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:32,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:32,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:32,665 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:53:32,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:53:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:32,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:32,718 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:53:32,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-20 23:53:32,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:32,749 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:53:32,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-20 23:53:33,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:33,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:33,958 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:53:33,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 280 [2021-11-20 23:53:33,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:33,995 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:53:33,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:53:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:34,049 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:53:34,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 250 [2021-11-20 23:53:35,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:35,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:35,201 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:53:35,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 288 treesize of output 286 [2021-11-20 23:53:35,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:35,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:35,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:35,294 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:53:35,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 284 treesize of output 291 [2021-11-20 23:53:35,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 262 [2021-11-20 23:53:37,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:37,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:53:37,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:37,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:37,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:37,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:37,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:37,429 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:53:37,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 255 treesize of output 258 [2021-11-20 23:53:37,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:37,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:37,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:53:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:37,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:37,522 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-20 23:53:37,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 247 treesize of output 255 [2021-11-20 23:53:42,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:42,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:53:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:42,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:42,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:42,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:53:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:43,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:53:46,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:46,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:46,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:53:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:47,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:47,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-20 23:53:48,115 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:53:48,137 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:53:49,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:53:49,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-20 23:53:49,337 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 97 for LOIs [2021-11-20 23:53:49,595 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:54:00,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:54:00,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:54:00,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 31 [2021-11-20 23:54:00,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410589567] [2021-11-20 23:54:00,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:54:00,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 23:54:00,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 23:54:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=3048, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 23:54:00,782 INFO L87 Difference]: Start difference. First operand 602 states and 821 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:54:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:05,089 INFO L93 Difference]: Finished difference Result 1913 states and 2600 transitions. [2021-11-20 23:54:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 23:54:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2021-11-20 23:54:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:05,099 INFO L225 Difference]: With dead ends: 1913 [2021-11-20 23:54:05,099 INFO L226 Difference]: Without dead ends: 1913 [2021-11-20 23:54:05,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1036, Invalid=7154, Unknown=0, NotChecked=0, Total=8190 [2021-11-20 23:54:05,102 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 2191 mSDsluCounter, 2909 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 2810 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:05,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2191 Valid, 2810 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 23:54:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-11-20 23:54:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 630. [2021-11-20 23:54:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 553 states have (on average 1.426763110307414) internal successors, (789), 588 states have internal predecessors, (789), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 23:54:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 849 transitions. [2021-11-20 23:54:05,141 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 849 transitions. Word has length 38 [2021-11-20 23:54:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:05,141 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 849 transitions. [2021-11-20 23:54:05,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 23:54:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 849 transitions. [2021-11-20 23:54:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 23:54:05,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:05,143 INFO L514 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] [2021-11-20 23:54:05,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:54:05,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 23:54:05,361 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:54:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1869771018, now seen corresponding path program 1 times [2021-11-20 23:54:05,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:05,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356578185] [2021-11-20 23:54:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:05,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:54:05,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:05,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356578185] [2021-11-20 23:54:05,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356578185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:05,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:05,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:54:05,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589028719] [2021-11-20 23:54:05,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:05,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:54:05,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:54:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:54:05,440 INFO L87 Difference]: Start difference. First operand 630 states and 849 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:54:05,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:05,692 INFO L93 Difference]: Finished difference Result 754 states and 1015 transitions. [2021-11-20 23:54:05,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:54:05,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-11-20 23:54:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:05,697 INFO L225 Difference]: With dead ends: 754 [2021-11-20 23:54:05,697 INFO L226 Difference]: Without dead ends: 754 [2021-11-20 23:54:05,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:54:05,698 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 98 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:05,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 276 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:54:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-11-20 23:54:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 630. [2021-11-20 23:54:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 553 states have (on average 1.423146473779385) internal successors, (787), 588 states have internal predecessors, (787), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 23:54:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 847 transitions. [2021-11-20 23:54:05,720 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 847 transitions. Word has length 39 [2021-11-20 23:54:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:05,720 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 847 transitions. [2021-11-20 23:54:05,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:54:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 847 transitions. [2021-11-20 23:54:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 23:54:05,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:05,721 INFO L514 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] [2021-11-20 23:54:05,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 23:54:05,722 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:54:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1869771017, now seen corresponding path program 1 times [2021-11-20 23:54:05,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:05,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370856850] [2021-11-20 23:54:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:05,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:54:05,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:05,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370856850] [2021-11-20 23:54:05,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370856850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:05,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:05,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:54:05,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433694524] [2021-11-20 23:54:05,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:05,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:54:05,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:54:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:54:05,792 INFO L87 Difference]: Start difference. First operand 630 states and 847 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:54:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:06,005 INFO L93 Difference]: Finished difference Result 625 states and 835 transitions. [2021-11-20 23:54:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:54:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-11-20 23:54:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:06,008 INFO L225 Difference]: With dead ends: 625 [2021-11-20 23:54:06,008 INFO L226 Difference]: Without dead ends: 625 [2021-11-20 23:54:06,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:54:06,009 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 106 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:06,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 253 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:54:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-20 23:54:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 595. [2021-11-20 23:54:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 523 states have (on average 1.3900573613766731) internal successors, (727), 553 states have internal predecessors, (727), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 23:54:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 787 transitions. [2021-11-20 23:54:06,028 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 787 transitions. Word has length 39 [2021-11-20 23:54:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:06,028 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 787 transitions. [2021-11-20 23:54:06,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:54:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 787 transitions. [2021-11-20 23:54:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:54:06,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:06,029 INFO L514 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] [2021-11-20 23:54:06,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 23:54:06,030 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:54:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:06,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1025910918, now seen corresponding path program 1 times [2021-11-20 23:54:06,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:06,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747486139] [2021-11-20 23:54:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:06,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:07,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:07,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747486139] [2021-11-20 23:54:07,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747486139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:54:07,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898463520] [2021-11-20 23:54:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:07,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:07,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:07,134 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:54:07,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:54:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:07,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 23:54:07,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:54:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:07,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:54:07,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:07,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:54:07,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:07,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:54:07,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:54:07,829 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-20 23:54:07,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 63 [2021-11-20 23:54:07,842 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-20 23:54:07,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 70 [2021-11-20 23:54:08,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:08,137 INFO L354 Elim1Store]: treesize reduction 59, result has 18.1 percent of original size [2021-11-20 23:54:08,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-11-20 23:54:08,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:08,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 103 [2021-11-20 23:54:08,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:08,270 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-11-20 23:54:08,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:08,651 INFO L354 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2021-11-20 23:54:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 28 [2021-11-20 23:54:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:08,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:54:22,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_item_~link_field~0#1| Int) (|ULTIMATE.start_create_item_~term_field~0#1| Int) (|ULTIMATE.start_create_item_#t~ite16#1.base| Int) (|ULTIMATE.start_create_item_~item~0#1.offset| Int) (|ULTIMATE.start_create_item_~link~0#1.base| Int)) (let ((.cse4 (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base|) (+ |ULTIMATE.start_create_item_~item~0#1.offset| (* |ULTIMATE.start_create_item_~link_field~0#1| 4)) |ULTIMATE.start_create_item_~link~0#1.base|) (+ |ULTIMATE.start_create_item_~item~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4)) |ULTIMATE.start_create_item_#t~ite16#1.base|)))) (store .cse5 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse5 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)))) (.cse3 (* ~unnamed1~0~LIST_BEG 4))) (let ((.cse1 (store (select .cse4 |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse3) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (and (forall ((|ULTIMATE.start_create_item_#t~ite16#1.offset| Int) (|ULTIMATE.start_append_one_~item~1#1.offset| Int) (|ULTIMATE.start_create_item_~link~0#1.offset| Int)) (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) (+ |ULTIMATE.start_create_item_~item~0#1.offset| (* |ULTIMATE.start_create_item_~link_field~0#1| 4)) |ULTIMATE.start_create_item_~link~0#1.offset|) (+ |ULTIMATE.start_create_item_~item~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4)) |ULTIMATE.start_create_item_#t~ite16#1.offset|)))) (store .cse0 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse0 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |ULTIMATE.start_create_item_~item~0#1.offset|))) |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4)) |ULTIMATE.start_append_one_~item~1#1.offset|) (+ (* ~unnamed2~0~ITEM_NEXT 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) 0)) (= (select .cse1 (+ (* ~unnamed2~0~ITEM_NEXT 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) 0)) (let ((.cse2 (select (store .cse4 |c_ULTIMATE.start_append_one_~list#1.base| .cse1) |c_~#list~0.base|))) (and (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| (select .cse2 (+ |c_~#list~0.offset| .cse3)) 0)) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| (select .cse2 (+ (* ~unnamed1~0~LIST_END 4) |c_~#list~0.offset|)) 0)))))))) is different from false [2021-11-20 23:54:24,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898463520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:54:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528735676] [2021-11-20 23:54:24,315 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2021-11-20 23:54:24,315 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:54:24,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:54:24,316 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:54:24,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:54:26,138 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:54:26,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:54:29,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:29,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:29,498 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:54:29,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:54:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:29,537 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:54:29,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:54:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:29,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:29,619 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:54:29,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:54:30,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:30,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:30,698 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:54:30,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 277 [2021-11-20 23:54:30,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:30,732 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:54:30,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:54:30,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:30,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:30,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:30,808 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:54:30,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 255 treesize of output 253 [2021-11-20 23:54:32,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:32,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:32,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:32,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:32,079 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:54:32,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 288 treesize of output 286 [2021-11-20 23:54:32,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:32,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 267 [2021-11-20 23:54:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:32,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:32,183 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:54:32,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 269 treesize of output 276 [2021-11-20 23:54:34,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:34,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:34,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:34,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:34,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:34,294 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-20 23:54:34,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 278 treesize of output 289 [2021-11-20 23:54:34,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:34,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 258 [2021-11-20 23:54:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:34,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:34,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:34,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:34,393 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:54:34,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 260 treesize of output 259 [2021-11-20 23:54:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:42,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:42,782 INFO L354 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2021-11-20 23:54:42,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2021-11-20 23:54:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:43,702 INFO L354 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2021-11-20 23:54:43,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2021-11-20 23:54:44,729 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-20 23:54:44,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 551 treesize of output 554 [2021-11-20 23:54:59,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,354 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:54:59,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:54:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,384 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:54:59,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:54:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:59,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,432 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:54:59,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:55:00,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:00,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:00,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:00,589 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:55:00,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 280 [2021-11-20 23:55:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:00,629 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:55:00,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:55:00,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:00,683 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:55:00,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 250 [2021-11-20 23:55:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:01,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:01,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:01,905 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:55:01,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 288 treesize of output 286 [2021-11-20 23:55:01,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:01,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 267 [2021-11-20 23:55:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:01,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:02,015 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:55:02,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 269 treesize of output 276 [2021-11-20 23:55:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:04,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:55:04,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:04,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:04,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:04,394 INFO L354 Elim1Store]: treesize reduction 179, result has 18.6 percent of original size [2021-11-20 23:55:04,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 255 treesize of output 266 [2021-11-20 23:55:04,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:04,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:04,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:04,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:04,475 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:55:04,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 260 treesize of output 263 [2021-11-20 23:55:12,658 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-20 23:55:12,659 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 2 case distinctions, treesize of input 33 treesize of output 37 [2021-11-20 23:55:12,982 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 0 case distinctions, treesize of input 46 treesize of output 43 [2021-11-20 23:55:14,798 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:55:14,866 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:55:15,362 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 16 for LOIs [2021-11-20 23:55:15,395 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:55:24,317 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:55:24,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:55:24,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-11-20 23:55:24,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969541825] [2021-11-20 23:55:24,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:55:24,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 23:55:24,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:55:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 23:55:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=3067, Unknown=3, NotChecked=114, Total=3540 [2021-11-20 23:55:24,321 INFO L87 Difference]: Start difference. First operand 595 states and 787 transitions. Second operand has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:55:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:55:25,365 INFO L93 Difference]: Finished difference Result 631 states and 824 transitions. [2021-11-20 23:55:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 23:55:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-20 23:55:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:55:25,369 INFO L225 Difference]: With dead ends: 631 [2021-11-20 23:55:25,369 INFO L226 Difference]: Without dead ends: 630 [2021-11-20 23:55:25,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=440, Invalid=3851, Unknown=3, NotChecked=128, Total=4422 [2021-11-20 23:55:25,371 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 155 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:55:25,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 946 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 448 Invalid, 0 Unknown, 321 Unchecked, 0.4s Time] [2021-11-20 23:55:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-20 23:55:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 605. [2021-11-20 23:55:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 532 states have (on average 1.3834586466165413) internal successors, (736), 562 states have internal predecessors, (736), 30 states have call successors, (30), 16 states have call predecessors, (30), 16 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 23:55:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 796 transitions. [2021-11-20 23:55:25,396 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 796 transitions. Word has length 40 [2021-11-20 23:55:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:55:25,396 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 796 transitions. [2021-11-20 23:55:25,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:55:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 796 transitions. [2021-11-20 23:55:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:55:25,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:55:25,398 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:55:25,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:55:25,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 23:55:25,614 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:55:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:55:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1025912389, now seen corresponding path program 1 times [2021-11-20 23:55:25,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:55:25,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546432226] [2021-11-20 23:55:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:55:25,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:55:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:55:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:55:27,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:55:27,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546432226] [2021-11-20 23:55:27,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546432226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:55:27,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204689590] [2021-11-20 23:55:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:55:27,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:55:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:55:27,619 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:55:27,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 23:55:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:55:27,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-20 23:55:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:55:28,054 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:55:28,054 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 11 treesize of output 11 [2021-11-20 23:55:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2021-11-20 23:55:28,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2021-11-20 23:55:28,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:29,008 INFO L354 Elim1Store]: treesize reduction 56, result has 41.1 percent of original size [2021-11-20 23:55:29,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 120 [2021-11-20 23:55:29,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 116 [2021-11-20 23:55:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:29,421 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 23:55:29,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 146 [2021-11-20 23:55:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:29,447 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 23:55:29,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 164 [2021-11-20 23:55:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:30,414 INFO L354 Elim1Store]: treesize reduction 124, result has 19.5 percent of original size [2021-11-20 23:55:30,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 146 treesize of output 154 [2021-11-20 23:55:30,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:30,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:30,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:30,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:30,440 INFO L354 Elim1Store]: treesize reduction 124, result has 19.5 percent of original size [2021-11-20 23:55:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 154 treesize of output 162 [2021-11-20 23:55:31,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:31,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:31,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:31,318 INFO L354 Elim1Store]: treesize reduction 56, result has 37.1 percent of original size [2021-11-20 23:55:31,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 149 treesize of output 112 [2021-11-20 23:55:31,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:31,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:31,347 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-20 23:55:31,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 97 treesize of output 95 [2021-11-20 23:55:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:55:31,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:56:40,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204689590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:56:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019887439] [2021-11-20 23:56:40,608 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-20 23:56:40,608 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:56:40,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:56:40,609 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:56:40,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:56:42,498 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:56:42,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:56:45,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:45,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:45,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:45,579 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:56:45,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:56:45,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:45,611 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:56:45,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 238 [2021-11-20 23:56:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:45,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:45,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:45,665 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:56:45,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 235 [2021-11-20 23:56:46,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:46,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:46,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:46,999 INFO L354 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2021-11-20 23:56:46,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 276 [2021-11-20 23:56:47,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:47,049 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:56:47,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 280 treesize of output 275 [2021-11-20 23:56:47,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:47,079 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:56:47,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 251 [2021-11-20 23:56:48,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:48,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:48,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:48,387 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:56:48,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 290 treesize of output 288 [2021-11-20 23:56:48,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:48,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:48,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:48,474 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-11-20 23:56:48,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 286 treesize of output 288 [2021-11-20 23:56:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:48,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 262 [2021-11-20 23:56:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:50,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:56:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:50,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:50,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:50,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:50,378 INFO L354 Elim1Store]: treesize reduction 187, result has 15.0 percent of original size [2021-11-20 23:56:50,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 255 treesize of output 258 [2021-11-20 23:56:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:50,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:50,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:56:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:56:50,476 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-20 23:56:50,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 243 treesize of output 251 [2021-11-20 23:56:59,196 INFO L354 Elim1Store]: treesize reduction 120, result has 11.8 percent of original size [2021-11-20 23:56:59,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 171 [2021-11-20 23:56:59,686 INFO L354 Elim1Store]: treesize reduction 120, result has 11.8 percent of original size [2021-11-20 23:56:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 203 [2021-11-20 23:57:00,672 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-11-20 23:57:00,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 564 treesize of output 566 [2021-11-20 23:57:14,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:14,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:14,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:14,762 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:57:14,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 262 [2021-11-20 23:57:14,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:14,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:14,806 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-20 23:57:14,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 258 [2021-11-20 23:57:14,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:14,831 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:57:14,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 234 [2021-11-20 23:57:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:15,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:15,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:15,947 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-11-20 23:57:15,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 280 [2021-11-20 23:57:15,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:15,983 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-20 23:57:15,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 253 [2021-11-20 23:57:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:16,037 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-20 23:57:16,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 250 [2021-11-20 23:57:17,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:17,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:17,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:17,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:17,191 INFO L354 Elim1Store]: treesize reduction 163, result has 20.1 percent of original size [2021-11-20 23:57:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 288 treesize of output 295 [2021-11-20 23:57:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:17,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 266 [2021-11-20 23:57:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:17,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:17,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:17,283 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-20 23:57:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 268 treesize of output 266 [2021-11-20 23:57:19,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:19,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 251 [2021-11-20 23:57:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:19,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:19,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:19,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:19,473 INFO L354 Elim1Store]: treesize reduction 182, result has 17.3 percent of original size [2021-11-20 23:57:19,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 253 treesize of output 261 [2021-11-20 23:57:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:19,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:19,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:19,561 INFO L354 Elim1Store]: treesize reduction 191, result has 13.2 percent of original size [2021-11-20 23:57:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 249 treesize of output 248 [2021-11-20 23:57:31,836 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 0 case distinctions, treesize of input 46 treesize of output 43 [2021-11-20 23:57:33,691 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:57:33,735 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:57:34,256 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-20 23:57:34,295 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:57:45,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:57:45,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:57:45,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-11-20 23:57:45,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520687761] [2021-11-20 23:57:45,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:57:45,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 23:57:45,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:45,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 23:57:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=4912, Unknown=2, NotChecked=0, Total=5402 [2021-11-20 23:57:45,211 INFO L87 Difference]: Start difference. First operand 605 states and 796 transitions. Second operand has 33 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:57:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:48,727 INFO L93 Difference]: Finished difference Result 711 states and 919 transitions. [2021-11-20 23:57:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 23:57:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-20 23:57:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:48,731 INFO L225 Difference]: With dead ends: 711 [2021-11-20 23:57:48,731 INFO L226 Difference]: Without dead ends: 703 [2021-11-20 23:57:48,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=717, Invalid=6937, Unknown=2, NotChecked=0, Total=7656 [2021-11-20 23:57:48,732 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 238 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:48,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1595 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1240 Invalid, 0 Unknown, 64 Unchecked, 1.2s Time] [2021-11-20 23:57:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-20 23:57:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 632. [2021-11-20 23:57:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 556 states have (on average 1.3866906474820144) internal successors, (771), 587 states have internal predecessors, (771), 32 states have call successors, (32), 17 states have call predecessors, (32), 17 states have return successors, (32), 27 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-20 23:57:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 835 transitions. [2021-11-20 23:57:48,752 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 835 transitions. Word has length 40 [2021-11-20 23:57:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:48,753 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 835 transitions. [2021-11-20 23:57:48,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:57:48,753 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 835 transitions. [2021-11-20 23:57:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:57:48,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:48,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-20 23:57:48,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:48,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 23:57:48,974 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:57:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1555335590, now seen corresponding path program 1 times [2021-11-20 23:57:48,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:48,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109961606] [2021-11-20 23:57:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:48,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:57:49,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:49,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109961606] [2021-11-20 23:57:49,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109961606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:49,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:49,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:57:49,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518626951] [2021-11-20 23:57:49,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:49,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:49,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:49,032 INFO L87 Difference]: Start difference. First operand 632 states and 835 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:57:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:49,315 INFO L93 Difference]: Finished difference Result 906 states and 1201 transitions. [2021-11-20 23:57:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:57:49,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-11-20 23:57:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:49,321 INFO L225 Difference]: With dead ends: 906 [2021-11-20 23:57:49,321 INFO L226 Difference]: Without dead ends: 906 [2021-11-20 23:57:49,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:57:49,322 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 80 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:49,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 361 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:57:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-11-20 23:57:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 630. [2021-11-20 23:57:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 556 states have (on average 1.3723021582733812) internal successors, (763), 585 states have internal predecessors, (763), 32 states have call successors, (32), 17 states have call predecessors, (32), 17 states have return successors, (32), 27 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-20 23:57:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 827 transitions. [2021-11-20 23:57:49,345 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 827 transitions. Word has length 41 [2021-11-20 23:57:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:49,346 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 827 transitions. [2021-11-20 23:57:49,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 23:57:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 827 transitions. [2021-11-20 23:57:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:57:49,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:49,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-20 23:57:49,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-20 23:57:49,348 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-11-20 23:57:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:49,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1555335589, now seen corresponding path program 1 times [2021-11-20 23:57:49,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:49,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62479823] [2021-11-20 23:57:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:49,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:57:50,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62479823] [2021-11-20 23:57:50,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62479823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083979464] [2021-11-20 23:57:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:50,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:50,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:50,734 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:50,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f185e267-c326-4303-9559-6ba35baf1405/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 23:57:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:50,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-20 23:57:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:51,105 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:57:51,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 23:57:51,128 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:57:51,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:57:51,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:57:51,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2021-11-20 23:57:51,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 23:57:51,912 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-20 23:57:51,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 88 [2021-11-20 23:57:51,924 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 23:57:51,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 101 [2021-11-20 23:57:52,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:52,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:52,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:57:52,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 97 [2021-11-20 23:57:52,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:52,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 92 [2021-11-20 23:57:53,024 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-11-20 23:57:53,024 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 67 treesize of output 84 [2021-11-20 23:57:53,069 INFO L354 Elim1Store]: treesize reduction 16, result has 73.8 percent of original size [2021-11-20 23:57:53,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 116 [2021-11-20 23:58:01,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:58:01,408 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 275 treesize of output 227 [2021-11-20 23:58:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:58:01,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:58:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 227 treesize of output 223 [2021-11-20 23:58:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:58:12,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:13,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083979464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:13,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1721304843] [2021-11-20 23:58:13,501 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-20 23:58:13,501 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:58:13,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:58:13,502 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:58:13,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:58:14,032 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-20 23:58:14,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 227 [2021-11-20 23:58:15,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-11-20 23:58:15,790 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:58:15,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:58:15,836 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:58:15,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:58:16,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-11-20 23:58:16,082 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-20 23:58:16,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 36 [2021-11-20 23:58:16,157 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-20 23:58:16,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 36 [2021-11-20 23:58:16,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:58:16,522 INFO L354 Elim1Store]: treesize reduction 96, result has 32.9 percent of original size [2021-11-20 23:58:16,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 63 [2021-11-20 23:58:16,635 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-11-20 23:58:16,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 39 [2021-11-20 23:58:17,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:17,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:17,446 INFO L354 Elim1Store]: treesize reduction 187, result has 30.5 percent of original size [2021-11-20 23:58:17,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 129 [2021-11-20 23:58:17,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-11-20 23:58:17,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:17,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:17,728 INFO L354 Elim1Store]: treesize reduction 228, result has 15.2 percent of original size [2021-11-20 23:58:17,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 64 [2021-11-20 23:58:19,470 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:58:19,480 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:58:21,101 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:58:21,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:58:21,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-11-20 23:58:21,152 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 23:58:21,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:58:21,819 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-20 23:58:21,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 36 [2021-11-20 23:58:21,876 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-20 23:58:21,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 36 [2021-11-20 23:58:21,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-11-20 23:58:22,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:58:22,245 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-11-20 23:58:22,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 39 [2021-11-20 23:58:22,309 INFO L354 Elim1Store]: treesize reduction 96, result has 32.9 percent of original size [2021-11-20 23:58:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 63 [2021-11-20 23:58:23,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-11-20 23:58:23,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:23,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:23,254 INFO L354 Elim1Store]: treesize reduction 228, result has 15.2 percent of original size [2021-11-20 23:58:23,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 64 [2021-11-20 23:58:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:23,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:58:23,435 INFO L354 Elim1Store]: treesize reduction 187, result has 30.5 percent of original size [2021-11-20 23:58:23,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 129 [2021-11-20 23:58:24,499 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:58:24,673 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:58:25,627 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2021-11-20 23:58:25,669 INFO L180 IcfgInterpreter]: Interpretation finished