./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V --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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:56:54,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:56:54,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:56:54,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:56:54,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:56:54,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:56:54,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:56:54,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:56:54,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:56:54,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:56:54,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:56:54,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:56:54,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:56:54,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:56:54,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:56:54,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:56:54,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:56:54,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:56:54,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:56:54,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:56:54,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:56:54,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:56:54,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:56:54,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:56:54,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:56:54,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:56:54,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:56:54,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:56:54,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:56:54,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:56:54,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:56:54,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:56:54,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:56:54,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:56:54,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:56:54,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:56:54,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:56:54,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:56:54,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:56:54,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:56:54,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:56:54,089 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 01:56:54,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:56:54,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:56:54,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:56:54,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:56:54,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:56:54,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:56:54,119 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:56:54,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:56:54,120 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:56:54,120 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:56:54,121 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:56:54,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:56:54,122 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:56:54,122 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:56:54,123 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:56:54,123 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:56:54,124 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:56:54,124 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:56:54,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 01:56:54,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 01:56:54,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:56:54,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:56:54,127 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 01:56:54,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:56:54,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:56:54,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:56:54,128 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 01:56:54,129 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 01:56:54,129 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 01:56:54,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:56:54,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 01:56:54,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:56:54,130 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:56:54,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:56:54,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:56:54,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:56:54,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:56:54,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:56:54,132 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:56:54,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:56:54,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:56:54,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:56:54,133 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_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2021-11-23 01:56:54,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:56:54,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:56:54,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:56:54,407 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:56:54,408 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:56:54,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2021-11-23 01:56:54,486 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/data/6b0ba895d/d160ad2732284c0f8e0c29b884f6e317/FLAG4ec6c0f06 [2021-11-23 01:56:55,140 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:56:55,140 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2021-11-23 01:56:55,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/data/6b0ba895d/d160ad2732284c0f8e0c29b884f6e317/FLAG4ec6c0f06 [2021-11-23 01:56:55,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/data/6b0ba895d/d160ad2732284c0f8e0c29b884f6e317 [2021-11-23 01:56:55,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:56:55,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:56:55,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:56:55,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:56:55,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:56:55,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:55" (1/1) ... [2021-11-23 01:56:55,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38126677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:55, skipping insertion in model container [2021-11-23 01:56:55,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:55" (1/1) ... [2021-11-23 01:56:55,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:56:55,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:56:55,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:56:55,931 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:56:56,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:56:56,064 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:56:56,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56 WrapperNode [2021-11-23 01:56:56,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:56:56,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:56:56,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:56:56,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:56:56,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,169 INFO L137 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 223 [2021-11-23 01:56:56,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:56:56,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:56:56,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:56:56,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:56:56,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:56:56,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:56:56,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:56:56,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:56:56,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (1/1) ... [2021-11-23 01:56:56,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:56:56,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:56:56,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:56:56,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:56:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-11-23 01:56:56,321 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-11-23 01:56:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 01:56:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 01:56:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:56:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 01:56:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 01:56:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:56:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 01:56:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:56:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:56:56,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:56:56,511 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:56:56,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:56:57,022 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:56:57,176 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:56:57,177 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 01:56:57,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:57 BoogieIcfgContainer [2021-11-23 01:56:57,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:56:57,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:56:57,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:56:57,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:56:57,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:56:55" (1/3) ... [2021-11-23 01:56:57,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75067d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:57, skipping insertion in model container [2021-11-23 01:56:57,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:56" (2/3) ... [2021-11-23 01:56:57,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75067d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:57, skipping insertion in model container [2021-11-23 01:56:57,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:57" (3/3) ... [2021-11-23 01:56:57,188 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2021-11-23 01:56:57,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:56:57,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2021-11-23 01:56:57,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:56:57,267 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 [2021-11-23 01:56:57,267 INFO L340 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2021-11-23 01:56:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 62 states have (on average 2.161290322580645) internal successors, (134), 119 states have internal predecessors, (134), 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) [2021-11-23 01:56:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 01:56:57,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:57,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 01:56:57,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:56:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash 9925585, now seen corresponding path program 1 times [2021-11-23 01:56:57,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:57,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573812723] [2021-11-23 01:56:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:57,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:56:57,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:57,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573812723] [2021-11-23 01:56:57,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573812723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:57,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:57,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:56:57,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450218049] [2021-11-23 01:56:57,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:57,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 01:56:57,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 01:56:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:56:57,524 INFO L87 Difference]: Start difference. First operand has 123 states, 62 states have (on average 2.161290322580645) internal successors, (134), 119 states have internal predecessors, (134), 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) [2021-11-23 01:56:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:57,624 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2021-11-23 01:56:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 01:56:57,626 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 [2021-11-23 01:56:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:57,636 INFO L225 Difference]: With dead ends: 123 [2021-11-23 01:56:57,637 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 01:56:57,646 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 [2021-11-23 01:56:57,651 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:57,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:56:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 01:56:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-23 01:56:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 61 states have (on average 2.098360655737705) internal successors, (128), 117 states have internal predecessors, (128), 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) [2021-11-23 01:56:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2021-11-23 01:56:57,723 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 4 [2021-11-23 01:56:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:57,723 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2021-11-23 01:56:57,724 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) [2021-11-23 01:56:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2021-11-23 01:56:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 01:56:57,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:57,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 01:56:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:56:57,727 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:56:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash 309290539, now seen corresponding path program 1 times [2021-11-23 01:56:57,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:57,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610479539] [2021-11-23 01:56:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:57,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:56:57,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:57,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610479539] [2021-11-23 01:56:57,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610479539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:57,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:57,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 01:56:57,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126539792] [2021-11-23 01:56:57,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:57,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:56:57,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:56:57,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:56:57,888 INFO L87 Difference]: Start difference. First operand 121 states and 132 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) [2021-11-23 01:56:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:58,101 INFO L93 Difference]: Finished difference Result 235 states and 256 transitions. [2021-11-23 01:56:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:56:58,102 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 [2021-11-23 01:56:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:58,105 INFO L225 Difference]: With dead ends: 235 [2021-11-23 01:56:58,106 INFO L226 Difference]: Without dead ends: 235 [2021-11-23 01:56:58,106 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 [2021-11-23 01:56:58,108 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 116 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:58,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 130 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:56:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-23 01:56:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 158. [2021-11-23 01:56:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 151 states have internal predecessors, (195), 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) [2021-11-23 01:56:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 203 transitions. [2021-11-23 01:56:58,135 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 203 transitions. Word has length 5 [2021-11-23 01:56:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:58,136 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 203 transitions. [2021-11-23 01:56:58,145 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) [2021-11-23 01:56:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 203 transitions. [2021-11-23 01:56:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 01:56:58,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:58,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 01:56:58,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:56:58,147 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:56:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash 309290540, now seen corresponding path program 1 times [2021-11-23 01:56:58,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:58,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007689253] [2021-11-23 01:56:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:58,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:56:58,375 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:58,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007689253] [2021-11-23 01:56:58,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007689253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:58,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:58,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:56:58,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570090602] [2021-11-23 01:56:58,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:58,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:56:58,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:58,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:56:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:56:58,379 INFO L87 Difference]: Start difference. First operand 158 states and 203 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) [2021-11-23 01:56:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:58,649 INFO L93 Difference]: Finished difference Result 266 states and 331 transitions. [2021-11-23 01:56:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:56:58,650 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 [2021-11-23 01:56:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:58,655 INFO L225 Difference]: With dead ends: 266 [2021-11-23 01:56:58,656 INFO L226 Difference]: Without dead ends: 266 [2021-11-23 01:56:58,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:56:58,664 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:58,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 234 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:56:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-23 01:56:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 218. [2021-11-23 01:56:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 149 states have (on average 1.9798657718120805) internal successors, (295), 207 states have internal predecessors, (295), 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) [2021-11-23 01:56:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 311 transitions. [2021-11-23 01:56:58,706 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 311 transitions. Word has length 5 [2021-11-23 01:56:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:58,706 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 311 transitions. [2021-11-23 01:56:58,707 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) [2021-11-23 01:56:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 311 transitions. [2021-11-23 01:56:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 01:56:58,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:58,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:58,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:56:58,708 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:56:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash 875516667, now seen corresponding path program 1 times [2021-11-23 01:56:58,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546984902] [2021-11-23 01:56:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:58,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:56:58,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546984902] [2021-11-23 01:56:58,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546984902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:58,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:58,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 01:56:58,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063791090] [2021-11-23 01:56:58,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:58,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:56:58,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:56:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:56:58,774 INFO L87 Difference]: Start difference. First operand 218 states and 311 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) [2021-11-23 01:56:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:58,933 INFO L93 Difference]: Finished difference Result 277 states and 367 transitions. [2021-11-23 01:56:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:56:58,934 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 [2021-11-23 01:56:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:58,937 INFO L225 Difference]: With dead ends: 277 [2021-11-23 01:56:58,937 INFO L226 Difference]: Without dead ends: 276 [2021-11-23 01:56:58,938 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 [2021-11-23 01:56:58,949 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 71 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:58,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 152 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:56:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-23 01:56:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2021-11-23 01:56:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 208 states have internal predecessors, (296), 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) [2021-11-23 01:56:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 312 transitions. [2021-11-23 01:56:58,975 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 312 transitions. Word has length 7 [2021-11-23 01:56:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:58,975 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 312 transitions. [2021-11-23 01:56:58,975 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) [2021-11-23 01:56:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 312 transitions. [2021-11-23 01:56:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 01:56:58,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:58,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:58,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:56:58,977 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:56:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash 875515289, now seen corresponding path program 1 times [2021-11-23 01:56:58,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:58,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130088404] [2021-11-23 01:56:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:58,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:56:59,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130088404] [2021-11-23 01:56:59,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130088404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:59,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:59,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:56:59,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478035346] [2021-11-23 01:56:59,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:59,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:56:59,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:56:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:56:59,031 INFO L87 Difference]: Start difference. First operand 219 states and 312 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) [2021-11-23 01:56:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:59,091 INFO L93 Difference]: Finished difference Result 306 states and 393 transitions. [2021-11-23 01:56:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:56:59,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 [2021-11-23 01:56:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:59,094 INFO L225 Difference]: With dead ends: 306 [2021-11-23 01:56:59,094 INFO L226 Difference]: Without dead ends: 303 [2021-11-23 01:56:59,095 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 [2021-11-23 01:56:59,096 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 109 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:59,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 221 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:56:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-23 01:56:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 217. [2021-11-23 01:56:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.9797297297297298) internal successors, (293), 206 states have internal predecessors, (293), 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) [2021-11-23 01:56:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 309 transitions. [2021-11-23 01:56:59,115 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 309 transitions. Word has length 7 [2021-11-23 01:56:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:59,116 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 309 transitions. [2021-11-23 01:56:59,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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) [2021-11-23 01:56:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 309 transitions. [2021-11-23 01:56:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 01:56:59,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:59,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:59,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:56:59,117 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:56:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash 299130113, now seen corresponding path program 1 times [2021-11-23 01:56:59,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:59,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393777757] [2021-11-23 01:56:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:59,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:56:59,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:59,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393777757] [2021-11-23 01:56:59,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393777757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:59,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:59,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:56:59,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147587027] [2021-11-23 01:56:59,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:59,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:56:59,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:56:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:56:59,168 INFO L87 Difference]: Start difference. First operand 217 states and 309 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) [2021-11-23 01:56:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:59,476 INFO L93 Difference]: Finished difference Result 333 states and 398 transitions. [2021-11-23 01:56:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:56:59,477 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 [2021-11-23 01:56:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:59,479 INFO L225 Difference]: With dead ends: 333 [2021-11-23 01:56:59,479 INFO L226 Difference]: Without dead ends: 333 [2021-11-23 01:56:59,480 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 [2021-11-23 01:56:59,480 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 216 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:59,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 219 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:56:59,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-23 01:56:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 217. [2021-11-23 01:56:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.9391891891891893) internal successors, (287), 206 states have internal predecessors, (287), 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) [2021-11-23 01:56:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 303 transitions. [2021-11-23 01:56:59,496 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 303 transitions. Word has length 10 [2021-11-23 01:56:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:59,496 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 303 transitions. [2021-11-23 01:56:59,496 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) [2021-11-23 01:56:59,497 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 303 transitions. [2021-11-23 01:56:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 01:56:59,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:59,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:59,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 01:56:59,498 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:56:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash 299130114, now seen corresponding path program 1 times [2021-11-23 01:56:59,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:59,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098404156] [2021-11-23 01:56:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:59,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:56:59,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:59,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098404156] [2021-11-23 01:56:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098404156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:59,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:59,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:56:59,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166810795] [2021-11-23 01:56:59,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:59,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:56:59,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:59,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:56:59,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:56:59,681 INFO L87 Difference]: Start difference. First operand 217 states and 303 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) [2021-11-23 01:57:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:00,113 INFO L93 Difference]: Finished difference Result 402 states and 496 transitions. [2021-11-23 01:57:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:57:00,114 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 [2021-11-23 01:57:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:00,116 INFO L225 Difference]: With dead ends: 402 [2021-11-23 01:57:00,116 INFO L226 Difference]: Without dead ends: 402 [2021-11-23 01:57:00,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:57:00,118 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 200 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:00,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 477 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:57:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-23 01:57:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 237. [2021-11-23 01:57:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 168 states have (on average 1.9464285714285714) internal successors, (327), 224 states have internal predecessors, (327), 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) [2021-11-23 01:57:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 343 transitions. [2021-11-23 01:57:00,130 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 343 transitions. Word has length 10 [2021-11-23 01:57:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:00,130 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 343 transitions. [2021-11-23 01:57:00,131 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) [2021-11-23 01:57:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 343 transitions. [2021-11-23 01:57:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:57:00,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:00,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:00,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:57:00,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:00,133 INFO L85 PathProgramCache]: Analyzing trace with hash -257128987, now seen corresponding path program 1 times [2021-11-23 01:57:00,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:00,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835004171] [2021-11-23 01:57:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:00,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:00,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835004171] [2021-11-23 01:57:00,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835004171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:00,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:00,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:00,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071017694] [2021-11-23 01:57:00,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:00,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:57:00,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:57:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:57:00,221 INFO L87 Difference]: Start difference. First operand 237 states and 343 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) [2021-11-23 01:57:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:00,494 INFO L93 Difference]: Finished difference Result 398 states and 528 transitions. [2021-11-23 01:57:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:00,495 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 [2021-11-23 01:57:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:00,497 INFO L225 Difference]: With dead ends: 398 [2021-11-23 01:57:00,497 INFO L226 Difference]: Without dead ends: 398 [2021-11-23 01:57:00,498 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 [2021-11-23 01:57:00,498 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 208 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:00,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 223 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-23 01:57:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 243. [2021-11-23 01:57:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 174 states have (on average 1.9137931034482758) internal successors, (333), 230 states have internal predecessors, (333), 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) [2021-11-23 01:57:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2021-11-23 01:57:00,510 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 12 [2021-11-23 01:57:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:00,510 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2021-11-23 01:57:00,510 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) [2021-11-23 01:57:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2021-11-23 01:57:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:57:00,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:00,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:00,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 01:57:00,512 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:00,512 INFO L85 PathProgramCache]: Analyzing trace with hash -257128986, now seen corresponding path program 1 times [2021-11-23 01:57:00,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:00,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183349543] [2021-11-23 01:57:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:00,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:00,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:00,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183349543] [2021-11-23 01:57:00,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183349543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:00,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:00,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:00,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277384818] [2021-11-23 01:57:00,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:00,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:57:00,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:57:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:57:00,579 INFO L87 Difference]: Start difference. First operand 243 states and 349 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) [2021-11-23 01:57:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:00,817 INFO L93 Difference]: Finished difference Result 285 states and 360 transitions. [2021-11-23 01:57:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:00,818 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 [2021-11-23 01:57:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:00,820 INFO L225 Difference]: With dead ends: 285 [2021-11-23 01:57:00,820 INFO L226 Difference]: Without dead ends: 285 [2021-11-23 01:57:00,821 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 [2021-11-23 01:57:00,821 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 146 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:00,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 234 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-23 01:57:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 243. [2021-11-23 01:57:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 174 states have (on average 1.8793103448275863) internal successors, (327), 230 states have internal predecessors, (327), 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) [2021-11-23 01:57:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 343 transitions. [2021-11-23 01:57:00,831 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 343 transitions. Word has length 12 [2021-11-23 01:57:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:00,831 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 343 transitions. [2021-11-23 01:57:00,831 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) [2021-11-23 01:57:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 343 transitions. [2021-11-23 01:57:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:57:00,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:00,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:00,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 01:57:00,832 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash -298520777, now seen corresponding path program 1 times [2021-11-23 01:57:00,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:00,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698294456] [2021-11-23 01:57:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:00,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:00,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:00,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698294456] [2021-11-23 01:57:00,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698294456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:00,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:00,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:57:00,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642796592] [2021-11-23 01:57:00,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:00,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:57:00,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:57:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:57:00,858 INFO L87 Difference]: Start difference. First operand 243 states and 343 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2021-11-23 01:57:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:01,003 INFO L93 Difference]: Finished difference Result 320 states and 419 transitions. [2021-11-23 01:57:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:57:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2021-11-23 01:57:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:01,006 INFO L225 Difference]: With dead ends: 320 [2021-11-23 01:57:01,006 INFO L226 Difference]: Without dead ends: 320 [2021-11-23 01:57:01,006 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 [2021-11-23 01:57:01,007 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 111 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:01,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 171 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-23 01:57:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 240. [2021-11-23 01:57:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 174 states have (on average 1.8103448275862069) internal successors, (315), 227 states have internal predecessors, (315), 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) [2021-11-23 01:57:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 331 transitions. [2021-11-23 01:57:01,017 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 331 transitions. Word has length 12 [2021-11-23 01:57:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:01,017 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 331 transitions. [2021-11-23 01:57:01,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2021-11-23 01:57:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 331 transitions. [2021-11-23 01:57:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:57:01,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:01,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:01,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 01:57:01,019 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash -298520776, now seen corresponding path program 1 times [2021-11-23 01:57:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:01,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683960358] [2021-11-23 01:57:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:01,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:01,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683960358] [2021-11-23 01:57:01,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683960358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:01,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:01,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:57:01,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102598951] [2021-11-23 01:57:01,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:01,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:57:01,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:01,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:57:01,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:57:01,144 INFO L87 Difference]: Start difference. First operand 240 states and 331 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2021-11-23 01:57:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:01,399 INFO L93 Difference]: Finished difference Result 268 states and 324 transitions. [2021-11-23 01:57:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:57:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 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 [2021-11-23 01:57:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:01,402 INFO L225 Difference]: With dead ends: 268 [2021-11-23 01:57:01,402 INFO L226 Difference]: Without dead ends: 268 [2021-11-23 01:57:01,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:57:01,403 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 391 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:01,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 541 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-23 01:57:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-11-23 01:57:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 174 states have (on average 1.764367816091954) internal successors, (307), 225 states have internal predecessors, (307), 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) [2021-11-23 01:57:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 323 transitions. [2021-11-23 01:57:01,411 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 323 transitions. Word has length 12 [2021-11-23 01:57:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:01,412 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 323 transitions. [2021-11-23 01:57:01,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2021-11-23 01:57:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 323 transitions. [2021-11-23 01:57:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 01:57:01,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:01,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:01,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 01:57:01,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash -664209455, now seen corresponding path program 1 times [2021-11-23 01:57:01,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:01,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742583926] [2021-11-23 01:57:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:01,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:01,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:01,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742583926] [2021-11-23 01:57:01,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742583926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:01,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:01,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:57:01,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27592479] [2021-11-23 01:57:01,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:01,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:57:01,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:57:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:57:01,523 INFO L87 Difference]: Start difference. First operand 238 states and 323 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-11-23 01:57:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:01,802 INFO L93 Difference]: Finished difference Result 267 states and 320 transitions. [2021-11-23 01:57:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:57:01,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 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 [2021-11-23 01:57:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:01,805 INFO L225 Difference]: With dead ends: 267 [2021-11-23 01:57:01,805 INFO L226 Difference]: Without dead ends: 267 [2021-11-23 01:57:01,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:57:01,806 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 386 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:01,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 541 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-23 01:57:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 237. [2021-11-23 01:57:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 174 states have (on average 1.7413793103448276) internal successors, (303), 224 states have internal predecessors, (303), 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) [2021-11-23 01:57:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 319 transitions. [2021-11-23 01:57:01,814 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 319 transitions. Word has length 13 [2021-11-23 01:57:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:01,815 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 319 transitions. [2021-11-23 01:57:01,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-11-23 01:57:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 319 transitions. [2021-11-23 01:57:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 01:57:01,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:01,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:01,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 01:57:01,817 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:01,818 INFO L85 PathProgramCache]: Analyzing trace with hash 582623978, now seen corresponding path program 1 times [2021-11-23 01:57:01,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:01,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381379777] [2021-11-23 01:57:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:01,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:02,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:02,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381379777] [2021-11-23 01:57:02,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381379777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:02,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:02,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:57:02,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562612003] [2021-11-23 01:57:02,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:02,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:57:02,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:57:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:57:02,069 INFO L87 Difference]: Start difference. First operand 237 states and 319 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2021-11-23 01:57:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:02,533 INFO L93 Difference]: Finished difference Result 327 states and 422 transitions. [2021-11-23 01:57:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:57:02,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 [2021-11-23 01:57:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:02,536 INFO L225 Difference]: With dead ends: 327 [2021-11-23 01:57:02,536 INFO L226 Difference]: Without dead ends: 325 [2021-11-23 01:57:02,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:57:02,537 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 150 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:02,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 455 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:57:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-23 01:57:02,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 276. [2021-11-23 01:57:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 208 states have (on average 1.7163461538461537) internal successors, (357), 259 states have internal predecessors, (357), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 01:57:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 379 transitions. [2021-11-23 01:57:02,548 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 379 transitions. Word has length 16 [2021-11-23 01:57:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:02,549 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 379 transitions. [2021-11-23 01:57:02,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2021-11-23 01:57:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 379 transitions. [2021-11-23 01:57:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 01:57:02,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:02,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:02,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 01:57:02,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -549321549, now seen corresponding path program 1 times [2021-11-23 01:57:02,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:02,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76437659] [2021-11-23 01:57:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:02,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:02,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76437659] [2021-11-23 01:57:02,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76437659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:02,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:02,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:57:02,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725215485] [2021-11-23 01:57:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:02,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:57:02,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:57:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:57:02,729 INFO L87 Difference]: Start difference. First operand 276 states and 379 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2021-11-23 01:57:03,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:03,083 INFO L93 Difference]: Finished difference Result 485 states and 624 transitions. [2021-11-23 01:57:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:57:03,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 [2021-11-23 01:57:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:03,088 INFO L225 Difference]: With dead ends: 485 [2021-11-23 01:57:03,088 INFO L226 Difference]: Without dead ends: 485 [2021-11-23 01:57:03,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:57:03,089 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 184 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:03,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 750 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:57:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-23 01:57:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 313. [2021-11-23 01:57:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 293 states have internal predecessors, (411), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 01:57:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 437 transitions. [2021-11-23 01:57:03,101 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 437 transitions. Word has length 16 [2021-11-23 01:57:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:03,101 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 437 transitions. [2021-11-23 01:57:03,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2021-11-23 01:57:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 437 transitions. [2021-11-23 01:57:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:57:03,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:03,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:03,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 01:57:03,103 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash 881849523, now seen corresponding path program 1 times [2021-11-23 01:57:03,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:03,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595740240] [2021-11-23 01:57:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:03,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:03,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:03,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595740240] [2021-11-23 01:57:03,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595740240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:03,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:03,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:57:03,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131032999] [2021-11-23 01:57:03,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:03,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:57:03,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:03,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:57:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:03,140 INFO L87 Difference]: Start difference. First operand 313 states and 437 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) [2021-11-23 01:57:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:03,365 INFO L93 Difference]: Finished difference Result 495 states and 651 transitions. [2021-11-23 01:57:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:03,366 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 [2021-11-23 01:57:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:03,369 INFO L225 Difference]: With dead ends: 495 [2021-11-23 01:57:03,369 INFO L226 Difference]: Without dead ends: 495 [2021-11-23 01:57:03,369 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 [2021-11-23 01:57:03,370 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 173 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:03,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 329 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-23 01:57:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 310. [2021-11-23 01:57:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 245 states have (on average 1.620408163265306) internal successors, (397), 290 states have internal predecessors, (397), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 01:57:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 423 transitions. [2021-11-23 01:57:03,388 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 423 transitions. Word has length 17 [2021-11-23 01:57:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:03,389 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 423 transitions. [2021-11-23 01:57:03,389 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) [2021-11-23 01:57:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 423 transitions. [2021-11-23 01:57:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:57:03,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:03,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:03,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 01:57:03,391 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:03,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:03,392 INFO L85 PathProgramCache]: Analyzing trace with hash 881849524, now seen corresponding path program 1 times [2021-11-23 01:57:03,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:03,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533284104] [2021-11-23 01:57:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:03,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:03,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:03,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533284104] [2021-11-23 01:57:03,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533284104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:03,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:03,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:57:03,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391040992] [2021-11-23 01:57:03,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:03,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:57:03,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:57:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:57:03,494 INFO L87 Difference]: Start difference. First operand 310 states and 423 transitions. Second operand has 4 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) [2021-11-23 01:57:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:03,680 INFO L93 Difference]: Finished difference Result 347 states and 435 transitions. [2021-11-23 01:57:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-11-23 01:57:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:03,683 INFO L225 Difference]: With dead ends: 347 [2021-11-23 01:57:03,683 INFO L226 Difference]: Without dead ends: 347 [2021-11-23 01:57:03,683 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 [2021-11-23 01:57:03,684 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 123 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:03,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 218 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-23 01:57:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 310. [2021-11-23 01:57:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 245 states have (on average 1.5755102040816327) internal successors, (386), 290 states have internal predecessors, (386), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 01:57:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 412 transitions. [2021-11-23 01:57:03,694 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 412 transitions. Word has length 17 [2021-11-23 01:57:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:03,694 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 412 transitions. [2021-11-23 01:57:03,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2021-11-23 01:57:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 412 transitions. [2021-11-23 01:57:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 01:57:03,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:03,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:03,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 01:57:03,696 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash 383321444, now seen corresponding path program 1 times [2021-11-23 01:57:03,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842085136] [2021-11-23 01:57:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:03,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:03,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:03,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842085136] [2021-11-23 01:57:03,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842085136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:03,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:03,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:57:03,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038110372] [2021-11-23 01:57:03,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:03,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:57:03,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:03,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:57:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:03,789 INFO L87 Difference]: Start difference. First operand 310 states and 412 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-23 01:57:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:03,988 INFO L93 Difference]: Finished difference Result 326 states and 405 transitions. [2021-11-23 01:57:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:03,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 18 [2021-11-23 01:57:03,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:03,991 INFO L225 Difference]: With dead ends: 326 [2021-11-23 01:57:03,991 INFO L226 Difference]: Without dead ends: 326 [2021-11-23 01:57:03,991 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 [2021-11-23 01:57:03,992 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 223 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:03,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 165 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:03,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-23 01:57:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 306. [2021-11-23 01:57:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 245 states have (on average 1.542857142857143) internal successors, (378), 286 states have internal predecessors, (378), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 01:57:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 404 transitions. [2021-11-23 01:57:04,002 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 404 transitions. Word has length 18 [2021-11-23 01:57:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:04,003 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 404 transitions. [2021-11-23 01:57:04,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-11-23 01:57:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 404 transitions. [2021-11-23 01:57:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 01:57:04,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:04,004 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] [2021-11-23 01:57:04,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 01:57:04,005 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1135669204, now seen corresponding path program 1 times [2021-11-23 01:57:04,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:04,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100785734] [2021-11-23 01:57:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:04,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:04,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100785734] [2021-11-23 01:57:04,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100785734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:04,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:04,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:57:04,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816658648] [2021-11-23 01:57:04,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:04,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:57:04,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:57:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:57:04,099 INFO L87 Difference]: Start difference. First operand 306 states and 404 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-11-23 01:57:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:04,380 INFO L93 Difference]: Finished difference Result 438 states and 568 transitions. [2021-11-23 01:57:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:57:04,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-11-23 01:57:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:04,384 INFO L225 Difference]: With dead ends: 438 [2021-11-23 01:57:04,384 INFO L226 Difference]: Without dead ends: 438 [2021-11-23 01:57:04,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 01:57:04,385 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 326 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:04,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 470 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-23 01:57:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 304. [2021-11-23 01:57:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 245 states have (on average 1.526530612244898) internal successors, (374), 284 states have internal predecessors, (374), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 01:57:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 400 transitions. [2021-11-23 01:57:04,398 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 400 transitions. Word has length 20 [2021-11-23 01:57:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:04,398 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 400 transitions. [2021-11-23 01:57:04,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-11-23 01:57:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 400 transitions. [2021-11-23 01:57:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 01:57:04,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:04,400 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] [2021-11-23 01:57:04,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 01:57:04,400 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash -846147334, now seen corresponding path program 1 times [2021-11-23 01:57:04,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:04,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927016731] [2021-11-23 01:57:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:04,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:04,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:04,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927016731] [2021-11-23 01:57:04,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927016731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:04,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:04,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:57:04,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205217930] [2021-11-23 01:57:04,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:04,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:57:04,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:57:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:04,465 INFO L87 Difference]: Start difference. First operand 304 states and 400 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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) [2021-11-23 01:57:04,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:04,640 INFO L93 Difference]: Finished difference Result 344 states and 435 transitions. [2021-11-23 01:57:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:57:04,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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 [2021-11-23 01:57:04,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:04,643 INFO L225 Difference]: With dead ends: 344 [2021-11-23 01:57:04,643 INFO L226 Difference]: Without dead ends: 344 [2021-11-23 01:57:04,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:57:04,644 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 105 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:04,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 337 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-23 01:57:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 304. [2021-11-23 01:57:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 245 states have (on average 1.5183673469387755) internal successors, (372), 284 states have internal predecessors, (372), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 01:57:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 398 transitions. [2021-11-23 01:57:04,654 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 398 transitions. Word has length 21 [2021-11-23 01:57:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:04,654 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 398 transitions. [2021-11-23 01:57:04,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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) [2021-11-23 01:57:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 398 transitions. [2021-11-23 01:57:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 01:57:04,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:04,656 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] [2021-11-23 01:57:04,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 01:57:04,656 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash -846004075, now seen corresponding path program 1 times [2021-11-23 01:57:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046418610] [2021-11-23 01:57:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:04,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:04,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:04,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046418610] [2021-11-23 01:57:04,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046418610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:04,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:04,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:57:04,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017320180] [2021-11-23 01:57:04,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:04,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:57:04,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:04,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:57:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:57:04,820 INFO L87 Difference]: Start difference. First operand 304 states and 398 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) [2021-11-23 01:57:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:05,119 INFO L93 Difference]: Finished difference Result 336 states and 425 transitions. [2021-11-23 01:57:05,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:57:05,119 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 [2021-11-23 01:57:05,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:05,121 INFO L225 Difference]: With dead ends: 336 [2021-11-23 01:57:05,121 INFO L226 Difference]: Without dead ends: 336 [2021-11-23 01:57:05,121 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 [2021-11-23 01:57:05,122 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 88 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:05,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 422 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-23 01:57:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 304. [2021-11-23 01:57:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 245 states have (on average 1.510204081632653) internal successors, (370), 284 states have internal predecessors, (370), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 01:57:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 396 transitions. [2021-11-23 01:57:05,131 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 396 transitions. Word has length 21 [2021-11-23 01:57:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:05,131 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 396 transitions. [2021-11-23 01:57:05,131 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) [2021-11-23 01:57:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 396 transitions. [2021-11-23 01:57:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 01:57:05,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:05,132 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] [2021-11-23 01:57:05,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 01:57:05,133 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:05,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:05,133 INFO L85 PathProgramCache]: Analyzing trace with hash -460763369, now seen corresponding path program 1 times [2021-11-23 01:57:05,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:05,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309094094] [2021-11-23 01:57:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:05,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:05,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:05,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309094094] [2021-11-23 01:57:05,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309094094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:05,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:05,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:57:05,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090222854] [2021-11-23 01:57:05,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:05,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:57:05,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:05,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:57:05,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:05,216 INFO L87 Difference]: Start difference. First operand 304 states and 396 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) [2021-11-23 01:57:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:05,431 INFO L93 Difference]: Finished difference Result 381 states and 483 transitions. [2021-11-23 01:57:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:57:05,433 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 [2021-11-23 01:57:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:05,435 INFO L225 Difference]: With dead ends: 381 [2021-11-23 01:57:05,435 INFO L226 Difference]: Without dead ends: 381 [2021-11-23 01:57:05,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:57:05,436 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 98 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:05,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 297 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-23 01:57:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 338. [2021-11-23 01:57:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 276 states have (on average 1.4891304347826086) internal successors, (411), 316 states have internal predecessors, (411), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 01:57:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 441 transitions. [2021-11-23 01:57:05,447 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 441 transitions. Word has length 22 [2021-11-23 01:57:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:05,447 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 441 transitions. [2021-11-23 01:57:05,447 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) [2021-11-23 01:57:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 441 transitions. [2021-11-23 01:57:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 01:57:05,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:05,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:05,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 01:57:05,449 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1073568393, now seen corresponding path program 1 times [2021-11-23 01:57:05,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:05,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691606128] [2021-11-23 01:57:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:05,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:05,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:05,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691606128] [2021-11-23 01:57:05,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691606128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:05,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165469963] [2021-11-23 01:57:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:05,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:05,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:05,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:05,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:57:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:05,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 01:57:05,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:06,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:06,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:57:06,442 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 141 treesize of output 137 [2021-11-23 01:57:06,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:06,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:06,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:57:06,472 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 131 treesize of output 127 [2021-11-23 01:57:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:06,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:07,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165469963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:07,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607421777] [2021-11-23 01:57:07,715 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 01:57:07,716 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:07,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:07,725 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:07,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:08,332 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2021-11-23 01:57:08,334 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:09,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12764#(and (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret29#1|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret29#1|) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= 3 |~#list~0.base|) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (or (< 10 ~i~0) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|))) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= (+ (* 4 ~unnamed1~0~LIST_END) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= |#StackHeapBarrier| |ULTIMATE.start_is_empty_~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 01:57:09,866 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:57:09,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:57:09,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2021-11-23 01:57:09,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611421610] [2021-11-23 01:57:09,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:57:09,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 01:57:09,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 01:57:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-11-23 01:57:09,868 INFO L87 Difference]: Start difference. First operand 338 states and 441 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:57:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:13,497 INFO L93 Difference]: Finished difference Result 1019 states and 1282 transitions. [2021-11-23 01:57:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 01:57:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2021-11-23 01:57:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:13,505 INFO L225 Difference]: With dead ends: 1019 [2021-11-23 01:57:13,506 INFO L226 Difference]: Without dead ends: 1015 [2021-11-23 01:57:13,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=464, Invalid=2292, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 01:57:13,508 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 1509 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:13,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 1226 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 01:57:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-11-23 01:57:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 522. [2021-11-23 01:57:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 436 states have (on average 1.4105504587155964) internal successors, (615), 484 states have internal predecessors, (615), 31 states have call successors, (31), 16 states have call predecessors, (31), 16 states have return successors, (31), 21 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-23 01:57:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 677 transitions. [2021-11-23 01:57:13,530 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 677 transitions. Word has length 23 [2021-11-23 01:57:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:13,530 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 677 transitions. [2021-11-23 01:57:13,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:57:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 677 transitions. [2021-11-23 01:57:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 01:57:13,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:13,531 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, 1, 1] [2021-11-23 01:57:13,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:13,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:13,747 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:13,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash -411959367, now seen corresponding path program 1 times [2021-11-23 01:57:13,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661136489] [2021-11-23 01:57:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:13,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:13,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:13,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661136489] [2021-11-23 01:57:13,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661136489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:13,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:13,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:57:13,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67711344] [2021-11-23 01:57:13,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:13,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:57:13,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:57:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:57:13,870 INFO L87 Difference]: Start difference. First operand 522 states and 677 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-11-23 01:57:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:14,351 INFO L93 Difference]: Finished difference Result 913 states and 1161 transitions. [2021-11-23 01:57:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:57:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 24 [2021-11-23 01:57:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:14,358 INFO L225 Difference]: With dead ends: 913 [2021-11-23 01:57:14,358 INFO L226 Difference]: Without dead ends: 913 [2021-11-23 01:57:14,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:57:14,359 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 245 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:14,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 443 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:57:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-11-23 01:57:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 580. [2021-11-23 01:57:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 488 states have (on average 1.3934426229508197) internal successors, (680), 538 states have internal predecessors, (680), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 23 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-23 01:57:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 750 transitions. [2021-11-23 01:57:14,382 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 750 transitions. Word has length 24 [2021-11-23 01:57:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:14,382 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 750 transitions. [2021-11-23 01:57:14,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-11-23 01:57:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 750 transitions. [2021-11-23 01:57:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 01:57:14,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:14,383 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, 1, 1, 1] [2021-11-23 01:57:14,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 01:57:14,384 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:14,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:14,384 INFO L85 PathProgramCache]: Analyzing trace with hash 114161726, now seen corresponding path program 1 times [2021-11-23 01:57:14,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:14,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511298057] [2021-11-23 01:57:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:14,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:14,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:14,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511298057] [2021-11-23 01:57:14,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511298057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:14,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:14,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:57:14,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467772901] [2021-11-23 01:57:14,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:14,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:57:14,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:57:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:14,457 INFO L87 Difference]: Start difference. First operand 580 states and 750 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2021-11-23 01:57:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:14,741 INFO L93 Difference]: Finished difference Result 737 states and 909 transitions. [2021-11-23 01:57:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:57:14,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 25 [2021-11-23 01:57:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:14,746 INFO L225 Difference]: With dead ends: 737 [2021-11-23 01:57:14,747 INFO L226 Difference]: Without dead ends: 737 [2021-11-23 01:57:14,747 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 [2021-11-23 01:57:14,748 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 200 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:14,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 298 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-23 01:57:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 580. [2021-11-23 01:57:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 488 states have (on average 1.3729508196721312) internal successors, (670), 538 states have internal predecessors, (670), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 23 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-23 01:57:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 740 transitions. [2021-11-23 01:57:14,774 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 740 transitions. Word has length 25 [2021-11-23 01:57:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:14,775 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 740 transitions. [2021-11-23 01:57:14,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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) [2021-11-23 01:57:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 740 transitions. [2021-11-23 01:57:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 01:57:14,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:14,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:14,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 01:57:14,777 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1198941190, now seen corresponding path program 1 times [2021-11-23 01:57:14,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:14,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830666337] [2021-11-23 01:57:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:14,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:57:14,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830666337] [2021-11-23 01:57:14,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830666337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697181372] [2021-11-23 01:57:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:14,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:14,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:14,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:14,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:57:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 01:57:15,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:15,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:15,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:57:15,563 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 29 treesize of output 33 [2021-11-23 01:57:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:57:15,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697181372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:15,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005511879] [2021-11-23 01:57:15,820 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-23 01:57:15,820 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:15,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:15,821 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:15,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:16,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:16,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2021-11-23 01:57:16,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:16,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,236 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:57:16,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,269 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:57:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,289 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:57:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 01:57:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 01:57:16,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,406 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:57:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2021-11-23 01:57:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 55 [2021-11-23 01:57:16,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,541 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 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:57:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,674 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 58 treesize of output 55 [2021-11-23 01:57:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,701 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 58 treesize of output 55 [2021-11-23 01:57:16,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:16,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:57:17,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,278 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:57:17,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:17,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,306 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:57:17,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,337 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:57:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 01:57:17,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 01:57:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,449 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:57:17,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 55 [2021-11-23 01:57:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 55 [2021-11-23 01:57:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,585 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 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:57:17,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:57:17,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,759 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 69 treesize of output 58 [2021-11-23 01:57:17,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:17,782 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 58 treesize of output 55 [2021-11-23 01:57:18,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:18,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:18,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2021-11-23 01:57:18,135 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 56 for LOIs [2021-11-23 01:57:18,144 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:22,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2005511879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:22,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:57:22,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [10, 7, 8] total 41 [2021-11-23 01:57:22,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681562224] [2021-11-23 01:57:22,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:22,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 01:57:22,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 01:57:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 01:57:22,870 INFO L87 Difference]: Start difference. First operand 580 states and 740 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-11-23 01:57:24,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:24,339 INFO L93 Difference]: Finished difference Result 619 states and 782 transitions. [2021-11-23 01:57:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 01:57:24,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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 29 [2021-11-23 01:57:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:24,343 INFO L225 Difference]: With dead ends: 619 [2021-11-23 01:57:24,344 INFO L226 Difference]: Without dead ends: 619 [2021-11-23 01:57:24,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 01:57:24,345 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 62 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:24,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 258 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 01:57:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-23 01:57:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 593. [2021-11-23 01:57:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 501 states have (on average 1.3632734530938124) internal successors, (683), 550 states have internal predecessors, (683), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 24 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-23 01:57:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 753 transitions. [2021-11-23 01:57:24,363 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 753 transitions. Word has length 29 [2021-11-23 01:57:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:24,363 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 753 transitions. [2021-11-23 01:57:24,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-11-23 01:57:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 753 transitions. [2021-11-23 01:57:24,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 01:57:24,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:24,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:24,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:24,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 01:57:24,588 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1550689634, now seen corresponding path program 1 times [2021-11-23 01:57:24,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:24,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291554910] [2021-11-23 01:57:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:24,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:57:24,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:24,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291554910] [2021-11-23 01:57:24,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291554910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:24,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899719113] [2021-11-23 01:57:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:24,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:24,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:24,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:24,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:57:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:24,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 01:57:24,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:25,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:25,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:57:25,415 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 29 treesize of output 33 [2021-11-23 01:57:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:57:25,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899719113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:25,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [975015735] [2021-11-23 01:57:25,654 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 01:57:25,654 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:25,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:25,655 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:25,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:25,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2021-11-23 01:57:25,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:25,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,975 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:57:25,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:25,991 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:57:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:26,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,030 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:57:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,081 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:57:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2021-11-23 01:57:26,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 01:57:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 55 [2021-11-23 01:57:26,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:57:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 55 [2021-11-23 01:57:26,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,392 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 58 treesize of output 55 [2021-11-23 01:57:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:57:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,442 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 58 treesize of output 55 [2021-11-23 01:57:26,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:26,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,623 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 140 [2021-11-23 01:57:26,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:26,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,647 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 114 [2021-11-23 01:57:26,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:57:26,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:26,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:26,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:26,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2021-11-23 01:57:27,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:27,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:27,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:27,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:27,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2021-11-23 01:57:27,198 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:57:27,198 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 17 treesize of output 21 [2021-11-23 01:57:27,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 01:57:27,316 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 [2021-11-23 01:57:27,325 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 [2021-11-23 01:57:27,336 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 [2021-11-23 01:57:27,375 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:57:27,375 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 27 treesize of output 34 [2021-11-23 01:57:27,387 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 [2021-11-23 01:57:27,413 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:57:27,414 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 27 treesize of output 34 [2021-11-23 01:57:27,484 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:57:27,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 61 [2021-11-23 01:57:27,516 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 13 treesize of output 9 [2021-11-23 01:57:27,559 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:57:27,559 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 50 treesize of output 61 [2021-11-23 01:57:27,802 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 [2021-11-23 01:57:27,815 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 [2021-11-23 01:57:27,832 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 [2021-11-23 01:57:28,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:28,309 INFO L354 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2021-11-23 01:57:28,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 106 [2021-11-23 01:57:28,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:28,341 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-23 01:57:28,341 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 91 [2021-11-23 01:57:28,430 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 [2021-11-23 01:57:31,314 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:57:31,314 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 17 treesize of output 23 [2021-11-23 01:57:31,352 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:57:31,353 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 17 treesize of output 21 [2021-11-23 01:57:31,435 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 [2021-11-23 01:57:31,443 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 [2021-11-23 01:57:31,455 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 [2021-11-23 01:57:31,490 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:57:31,490 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 27 treesize of output 34 [2021-11-23 01:57:31,511 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:57:31,512 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 27 treesize of output 34 [2021-11-23 01:57:31,521 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 [2021-11-23 01:57:31,579 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:57:31,580 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 50 treesize of output 61 [2021-11-23 01:57:31,648 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:57:31,649 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 50 treesize of output 61 [2021-11-23 01:57:31,686 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 13 treesize of output 9 [2021-11-23 01:57:31,899 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 [2021-11-23 01:57:31,907 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 [2021-11-23 01:57:31,916 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 15 treesize of output 11 [2021-11-23 01:57:32,237 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 [2021-11-23 01:57:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:32,273 INFO L354 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2021-11-23 01:57:32,273 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 106 [2021-11-23 01:57:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:32,297 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-23 01:57:32,298 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 99 [2021-11-23 01:57:32,802 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:57:32,803 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 17 treesize of output 23 [2021-11-23 01:57:32,834 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:57:32,835 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 17 treesize of output 21 [2021-11-23 01:57:32,940 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2021-11-23 01:57:32,950 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:38,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18817#(and (<= |~#list~0.base| 3) (= |~#list~0.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |#NULL.base|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_main_~y~0#1| 5) (<= |ULTIMATE.start_main_#t~ret24#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ |ULTIMATE.start_main_#t~ret24#1| 2147483648)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_main_#t~ret24#1|) (= |ULTIMATE.start_append_one_~list#1.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (= |ULTIMATE.start_append_one_#in~list#1.base| |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_append_one_~to#1|) (<= |#NULL.base| 0) (or (< (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset|) 0) (< (select |#length| |ULTIMATE.start_append_one_~list#1.base|) (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset| 4))) (= |ULTIMATE.start_append_one_#in~list#1.base| |~#list~0.base|) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2021-11-23 01:57:38,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:57:38,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:57:38,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 25 [2021-11-23 01:57:38,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457933257] [2021-11-23 01:57:38,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:57:38,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 01:57:38,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:38,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 01:57:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 01:57:38,296 INFO L87 Difference]: Start difference. First operand 593 states and 753 transitions. Second operand has 26 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:57:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:38,758 INFO L93 Difference]: Finished difference Result 608 states and 750 transitions. [2021-11-23 01:57:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:57:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2021-11-23 01:57:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:38,762 INFO L225 Difference]: With dead ends: 608 [2021-11-23 01:57:38,762 INFO L226 Difference]: Without dead ends: 608 [2021-11-23 01:57:38,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 01:57:38,763 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 693 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:38,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 798 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:57:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-23 01:57:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 579. [2021-11-23 01:57:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 489 states have (on average 1.3537832310838447) internal successors, (662), 537 states have internal predecessors, (662), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 23 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-23 01:57:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 732 transitions. [2021-11-23 01:57:38,778 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 732 transitions. Word has length 30 [2021-11-23 01:57:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:38,779 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 732 transitions. [2021-11-23 01:57:38,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:57:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 732 transitions. [2021-11-23 01:57:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 01:57:38,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:38,780 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] [2021-11-23 01:57:38,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:38,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 01:57:38,995 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash 182553730, now seen corresponding path program 1 times [2021-11-23 01:57:38,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172944670] [2021-11-23 01:57:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:38,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:57:39,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:39,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172944670] [2021-11-23 01:57:39,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172944670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:39,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434055626] [2021-11-23 01:57:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:39,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:39,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:39,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:57:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:39,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 01:57:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:39,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:57:39,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434055626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:39,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:57:39,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2021-11-23 01:57:39,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971079415] [2021-11-23 01:57:39,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:39,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:57:39,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:39,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:57:39,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-23 01:57:39,586 INFO L87 Difference]: Start difference. First operand 579 states and 732 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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) [2021-11-23 01:57:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:39,874 INFO L93 Difference]: Finished difference Result 699 states and 864 transitions. [2021-11-23 01:57:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:57:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 32 [2021-11-23 01:57:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:39,878 INFO L225 Difference]: With dead ends: 699 [2021-11-23 01:57:39,878 INFO L226 Difference]: Without dead ends: 699 [2021-11-23 01:57:39,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-23 01:57:39,879 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 362 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:39,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 222 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:57:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-23 01:57:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 576. [2021-11-23 01:57:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 489 states have (on average 1.343558282208589) internal successors, (657), 534 states have internal predecessors, (657), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 23 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-23 01:57:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 727 transitions. [2021-11-23 01:57:39,899 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 727 transitions. Word has length 32 [2021-11-23 01:57:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:39,899 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 727 transitions. [2021-11-23 01:57:39,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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) [2021-11-23 01:57:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 727 transitions. [2021-11-23 01:57:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 01:57:39,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:39,901 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] [2021-11-23 01:57:39,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 01:57:40,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 01:57:40,115 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:40,115 INFO L85 PathProgramCache]: Analyzing trace with hash 83099739, now seen corresponding path program 1 times [2021-11-23 01:57:40,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:40,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116388797] [2021-11-23 01:57:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:40,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:40,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:40,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116388797] [2021-11-23 01:57:40,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116388797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113835981] [2021-11-23 01:57:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:40,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:40,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:40,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:57:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:40,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 01:57:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:40,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:57:40,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113835981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:40,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:57:40,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2021-11-23 01:57:40,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284638374] [2021-11-23 01:57:40,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:40,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:57:40,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:57:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-23 01:57:40,743 INFO L87 Difference]: Start difference. First operand 576 states and 727 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 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) [2021-11-23 01:57:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:40,915 INFO L93 Difference]: Finished difference Result 593 states and 727 transitions. [2021-11-23 01:57:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:57:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 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 32 [2021-11-23 01:57:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:40,920 INFO L225 Difference]: With dead ends: 593 [2021-11-23 01:57:40,920 INFO L226 Difference]: Without dead ends: 593 [2021-11-23 01:57:40,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-23 01:57:40,921 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 314 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:40,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 205 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-23 01:57:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 575. [2021-11-23 01:57:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 489 states have (on average 1.3394683026584866) internal successors, (655), 533 states have internal predecessors, (655), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 23 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-23 01:57:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 725 transitions. [2021-11-23 01:57:40,939 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 725 transitions. Word has length 32 [2021-11-23 01:57:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:40,939 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 725 transitions. [2021-11-23 01:57:40,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 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) [2021-11-23 01:57:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 725 transitions. [2021-11-23 01:57:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 01:57:40,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:40,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:57:40,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:41,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 01:57:41,163 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:41,163 INFO L85 PathProgramCache]: Analyzing trace with hash 194841842, now seen corresponding path program 1 times [2021-11-23 01:57:41,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:41,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391008223] [2021-11-23 01:57:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:41,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:57:41,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:41,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391008223] [2021-11-23 01:57:41,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391008223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:41,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186343651] [2021-11-23 01:57:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:41,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:41,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:41,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:41,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 01:57:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 01:57:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:41,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:41,495 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 01:57:41,495 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 12 treesize of output 11 [2021-11-23 01:57:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:57:41,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186343651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:41,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229227537] [2021-11-23 01:57:41,536 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-23 01:57:41,537 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:41,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:41,537 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:41,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:42,248 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 56 for LOIs [2021-11-23 01:57:42,254 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:57:44,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1229227537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:44,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:57:44,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 23 [2021-11-23 01:57:44,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641585174] [2021-11-23 01:57:44,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:44,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 01:57:44,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:44,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 01:57:44,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:57:44,306 INFO L87 Difference]: Start difference. First operand 575 states and 725 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-11-23 01:57:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:44,849 INFO L93 Difference]: Finished difference Result 593 states and 745 transitions. [2021-11-23 01:57:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 01:57:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 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 34 [2021-11-23 01:57:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:44,853 INFO L225 Difference]: With dead ends: 593 [2021-11-23 01:57:44,853 INFO L226 Difference]: Without dead ends: 593 [2021-11-23 01:57:44,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:57:44,854 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 37 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:44,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 190 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 01:57:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-23 01:57:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 584. [2021-11-23 01:57:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 497 states have (on average 1.336016096579477) internal successors, (664), 541 states have internal predecessors, (664), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 24 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-23 01:57:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 736 transitions. [2021-11-23 01:57:44,872 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 736 transitions. Word has length 34 [2021-11-23 01:57:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:44,873 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 736 transitions. [2021-11-23 01:57:44,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-11-23 01:57:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 736 transitions. [2021-11-23 01:57:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 01:57:44,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:44,874 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] [2021-11-23 01:57:44,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 01:57:45,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 01:57:45,095 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1745478294, now seen corresponding path program 1 times [2021-11-23 01:57:45,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:45,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495223802] [2021-11-23 01:57:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:45,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:45,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:45,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495223802] [2021-11-23 01:57:45,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495223802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:45,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308908545] [2021-11-23 01:57:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:45,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:45,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:45,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:45,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 01:57:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:45,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:57:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:45,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:57:45,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308908545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:45,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:57:45,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-23 01:57:45,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186297938] [2021-11-23 01:57:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:45,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:57:45,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:57:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:45,274 INFO L87 Difference]: Start difference. First operand 584 states and 736 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2021-11-23 01:57:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:45,361 INFO L93 Difference]: Finished difference Result 705 states and 883 transitions. [2021-11-23 01:57:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:57:45,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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 34 [2021-11-23 01:57:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:45,365 INFO L225 Difference]: With dead ends: 705 [2021-11-23 01:57:45,365 INFO L226 Difference]: Without dead ends: 705 [2021-11-23 01:57:45,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:57:45,367 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 163 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:45,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 232 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:57:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-23 01:57:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 603. [2021-11-23 01:57:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 516 states have (on average 1.3372093023255813) internal successors, (690), 560 states have internal predecessors, (690), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 24 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-23 01:57:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 762 transitions. [2021-11-23 01:57:45,398 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 762 transitions. Word has length 34 [2021-11-23 01:57:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:45,398 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 762 transitions. [2021-11-23 01:57:45,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2021-11-23 01:57:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 762 transitions. [2021-11-23 01:57:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 01:57:45,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:45,400 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] [2021-11-23 01:57:45,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:45,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:45,615 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:45,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1745479672, now seen corresponding path program 1 times [2021-11-23 01:57:45,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:45,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820056924] [2021-11-23 01:57:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:45,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:46,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:46,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820056924] [2021-11-23 01:57:46,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820056924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:46,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:46,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 01:57:46,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335323080] [2021-11-23 01:57:46,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:46,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 01:57:46,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:46,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 01:57:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-23 01:57:46,288 INFO L87 Difference]: Start difference. First operand 603 states and 762 transitions. Second operand has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-11-23 01:57:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:47,260 INFO L93 Difference]: Finished difference Result 791 states and 962 transitions. [2021-11-23 01:57:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 01:57:47,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 34 [2021-11-23 01:57:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:47,263 INFO L225 Difference]: With dead ends: 791 [2021-11-23 01:57:47,264 INFO L226 Difference]: Without dead ends: 791 [2021-11-23 01:57:47,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-11-23 01:57:47,265 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 836 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:47,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 732 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 01:57:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-11-23 01:57:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 665. [2021-11-23 01:57:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 573 states have (on average 1.3385689354275743) internal successors, (767), 618 states have internal predecessors, (767), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (40), 26 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-23 01:57:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 847 transitions. [2021-11-23 01:57:47,286 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 847 transitions. Word has length 34 [2021-11-23 01:57:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:47,287 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 847 transitions. [2021-11-23 01:57:47,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-11-23 01:57:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 847 transitions. [2021-11-23 01:57:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 01:57:47,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:47,289 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] [2021-11-23 01:57:47,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 01:57:47,289 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1745479671, now seen corresponding path program 1 times [2021-11-23 01:57:47,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:47,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891475845] [2021-11-23 01:57:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:47,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:48,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:48,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891475845] [2021-11-23 01:57:48,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891475845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:48,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624492693] [2021-11-23 01:57:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:48,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:48,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:48,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 01:57:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 01:57:48,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:48,219 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 [2021-11-23 01:57:48,412 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 [2021-11-23 01:57:48,425 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 [2021-11-23 01:57:48,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:48,564 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 35 treesize of output 26 [2021-11-23 01:57:48,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:48,573 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 [2021-11-23 01:57:48,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:48,820 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-23 01:57:48,820 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 89 treesize of output 68 [2021-11-23 01:57:48,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:48,832 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-23 01:57:48,833 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 59 treesize of output 38 [2021-11-23 01:57:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:48,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:57:48,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624492693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:48,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:57:48,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 22 [2021-11-23 01:57:48,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965756249] [2021-11-23 01:57:48,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:48,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 01:57:48,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 01:57:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:57:48,877 INFO L87 Difference]: Start difference. First operand 665 states and 847 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-11-23 01:57:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:57:49,859 INFO L93 Difference]: Finished difference Result 834 states and 1020 transitions. [2021-11-23 01:57:49,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 01:57:49,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 34 [2021-11-23 01:57:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:57:49,863 INFO L225 Difference]: With dead ends: 834 [2021-11-23 01:57:49,863 INFO L226 Difference]: Without dead ends: 834 [2021-11-23 01:57:49,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=316, Invalid=1016, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 01:57:49,864 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1042 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 01:57:49,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1044 Valid, 694 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 01:57:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-23 01:57:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 704. [2021-11-23 01:57:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 609 states have (on average 1.354679802955665) internal successors, (825), 655 states have internal predecessors, (825), 42 states have call successors, (42), 21 states have call predecessors, (42), 21 states have return successors, (42), 27 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-23 01:57:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 909 transitions. [2021-11-23 01:57:49,887 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 909 transitions. Word has length 34 [2021-11-23 01:57:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:49,887 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 909 transitions. [2021-11-23 01:57:49,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-11-23 01:57:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 909 transitions. [2021-11-23 01:57:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 01:57:49,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:49,889 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] [2021-11-23 01:57:49,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 01:57:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:50,115 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:57:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2006088582, now seen corresponding path program 1 times [2021-11-23 01:57:50,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396368466] [2021-11-23 01:57:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:50,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:57:50,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396368466] [2021-11-23 01:57:50,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396368466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:57:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445404834] [2021-11-23 01:57:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:50,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:57:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:57:50,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:57:50,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 01:57:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:51,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 01:57:51,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:57:51,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:51,400 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 52 treesize of output 51 [2021-11-23 01:57:51,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:51,403 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 45 treesize of output 44 [2021-11-23 01:57:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:51,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:57:51,682 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 [2021-11-23 01:57:51,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:51,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:57:51,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 142 treesize of output 118 [2021-11-23 01:57:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:57:51,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:57:53,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:53,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:53,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:57:53,046 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 228 treesize of output 230 [2021-11-23 01:57:53,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:53,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 01:57:53,071 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 249 treesize of output 251 [2021-11-23 01:57:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:57:53,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445404834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:57:53,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748718639] [2021-11-23 01:57:53,768 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-23 01:57:53,768 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:57:53,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:57:53,769 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:57:53,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:57:53,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:53,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:53,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:53,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:53,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2021-11-23 01:57:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,067 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:57:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,100 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:57:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,113 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:57:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 01:57:54,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 58 treesize of output 55 [2021-11-23 01:57:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,217 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:57:54,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,272 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 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:57:54,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 73 treesize of output 58 [2021-11-23 01:57:54,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 55 [2021-11-23 01:57:54,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,444 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 69 treesize of output 58 [2021-11-23 01:57:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,478 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 58 treesize of output 55 [2021-11-23 01:57:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:57:54,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,704 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 140 [2021-11-23 01:57:54,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,728 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 114 [2021-11-23 01:57:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:57:55,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:55,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:55,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:55,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:55,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:55,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2021-11-23 01:57:55,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:55,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:55,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:55,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:55,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:55,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2021-11-23 01:57:55,272 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:57:55,273 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 17 treesize of output 21 [2021-11-23 01:57:55,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 01:57:55,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-23 01:57:55,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-11-23 01:57:55,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-11-23 01:57:55,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-23 01:57:55,493 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:57:55,493 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 1 case distinctions, treesize of input 38 treesize of output 48 [2021-11-23 01:57:55,519 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:57:55,519 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 1 case distinctions, treesize of input 38 treesize of output 48 [2021-11-23 01:57:55,599 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:57:55,600 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 3 case distinctions, treesize of input 61 treesize of output 75 [2021-11-23 01:57:55,670 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:57:55,671 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 3 case distinctions, treesize of input 61 treesize of output 75 [2021-11-23 01:57:55,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:57:56,299 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 [2021-11-23 01:57:56,312 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 [2021-11-23 01:57:56,449 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 [2021-11-23 01:57:56,687 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 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 01:57:56,702 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 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 01:57:56,713 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 [2021-11-23 01:57:57,014 INFO L354 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2021-11-23 01:57:57,016 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 3 case distinctions, treesize of input 89 treesize of output 92 [2021-11-23 01:57:57,051 INFO L354 Elim1Store]: treesize reduction 53, result has 15.9 percent of original size [2021-11-23 01:57:57,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 90 [2021-11-23 01:57:57,206 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 23 treesize of output 1 [2021-11-23 01:57:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-11-23 01:57:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,258 INFO L354 Elim1Store]: treesize reduction 65, result has 14.5 percent of original size [2021-11-23 01:57:57,260 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 97 treesize of output 91 [2021-11-23 01:57:57,325 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 23 treesize of output 1 [2021-11-23 01:57:57,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:57,374 INFO L354 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2021-11-23 01:57:57,375 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 5 case distinctions, treesize of input 108 treesize of output 105 [2021-11-23 01:57:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:57,430 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-23 01:57:57,430 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 38 treesize of output 44 [2021-11-23 01:57:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:57,510 INFO L354 Elim1Store]: treesize reduction 115, result has 8.7 percent of original size [2021-11-23 01:57:57,511 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 6 case distinctions, treesize of input 123 treesize of output 108 [2021-11-23 01:57:57,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:57,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 01:57:57,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 47 [2021-11-23 01:57:57,586 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 13 treesize of output 9 [2021-11-23 01:57:57,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:57,812 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-23 01:57:57,813 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 3 case distinctions, treesize of input 53 treesize of output 54 [2021-11-23 01:57:57,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:57:57,867 INFO L354 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2021-11-23 01:57:57,867 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 7 case distinctions, treesize of input 119 treesize of output 108 [2021-11-23 01:57:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:57:57,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-23 01:57:58,066 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 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 01:57:58,079 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 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 01:57:58,095 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 [2021-11-23 01:57:58,977 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:57:58,977 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 17 treesize of output 23 [2021-11-23 01:57:59,001 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:57:59,001 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 17 treesize of output 21 [2021-11-23 01:57:59,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-11-23 01:57:59,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-23 01:57:59,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-11-23 01:57:59,213 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:57:59,214 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 1 case distinctions, treesize of input 38 treesize of output 48 [2021-11-23 01:57:59,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-23 01:57:59,256 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:57:59,257 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 1 case distinctions, treesize of input 38 treesize of output 48 [2021-11-23 01:57:59,327 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 19 treesize of output 1 [2021-11-23 01:57:59,340 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 19 treesize of output 1 [2021-11-23 01:57:59,349 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 13 treesize of output 9 [2021-11-23 01:57:59,405 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 [2021-11-23 01:57:59,432 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-23 01:57:59,432 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 33 treesize of output 27 [2021-11-23 01:57:59,448 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 [2021-11-23 01:57:59,648 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2021-11-23 01:57:59,651 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:58:06,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28952#(and (<= |~#list~0.base| 3) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret29#1|) (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret29#1|) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= |#NULL.base| 0) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 |~#list~0.offset|) (<= (+ (* 4 ~unnamed1~0~LIST_END) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (<= |#StackHeapBarrier| |ULTIMATE.start_is_empty_~list#1.base|) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|)) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2021-11-23 01:58:06,211 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:58:06,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:58:06,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 14] total 40 [2021-11-23 01:58:06,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44808822] [2021-11-23 01:58:06,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:58:06,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 01:58:06,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 01:58:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=4129, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 01:58:06,215 INFO L87 Difference]: Start difference. First operand 704 states and 909 transitions. Second operand has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:58:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:16,170 INFO L93 Difference]: Finished difference Result 1989 states and 2476 transitions. [2021-11-23 01:58:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-23 01:58:16,171 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-11-23 01:58:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:16,179 INFO L225 Difference]: With dead ends: 1989 [2021-11-23 01:58:16,179 INFO L226 Difference]: Without dead ends: 1986 [2021-11-23 01:58:16,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1751, Invalid=15279, Unknown=0, NotChecked=0, Total=17030 [2021-11-23 01:58:16,184 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 3471 mSDsluCounter, 6068 mSDsCounter, 0 mSdLazyCounter, 4592 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 5360 SdHoareTripleChecker+Invalid, 5440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 4592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:16,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3474 Valid, 5360 Invalid, 5440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 4592 Invalid, 0 Unknown, 520 Unchecked, 3.2s Time] [2021-11-23 01:58:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-11-23 01:58:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1221. [2021-11-23 01:58:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1081 states have (on average 1.4116558741905643) internal successors, (1526), 1133 states have internal predecessors, (1526), 70 states have call successors, (70), 38 states have call predecessors, (70), 38 states have return successors, (70), 49 states have call predecessors, (70), 70 states have call successors, (70) [2021-11-23 01:58:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1666 transitions. [2021-11-23 01:58:16,228 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1666 transitions. Word has length 36 [2021-11-23 01:58:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:16,229 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 1666 transitions. [2021-11-23 01:58:16,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 01:58:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1666 transitions. [2021-11-23 01:58:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 01:58:16,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:16,231 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] [2021-11-23 01:58:16,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:16,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-23 01:58:16,447 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:58:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash 874143055, now seen corresponding path program 1 times [2021-11-23 01:58:16,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:16,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197321789] [2021-11-23 01:58:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:16,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:58:17,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:17,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197321789] [2021-11-23 01:58:17,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197321789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:17,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045415086] [2021-11-23 01:58:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:17,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:17,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:17,027 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:17,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 01:58:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 01:58:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:17,351 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:58:17,351 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 [2021-11-23 01:58:17,460 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 45 treesize of output 44 [2021-11-23 01:58:17,465 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 30 treesize of output 29 [2021-11-23 01:58:17,508 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 45 treesize of output 44 [2021-11-23 01:58:17,511 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 41 treesize of output 40 [2021-11-23 01:58:17,608 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-23 01:58:17,608 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 1 case distinctions, treesize of input 75 treesize of output 68 [2021-11-23 01:58:17,628 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-23 01:58:17,628 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 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-23 01:58:17,840 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-23 01:58:17,841 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 45 treesize of output 52 [2021-11-23 01:58:17,859 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 01:58:17,859 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 49 treesize of output 48 [2021-11-23 01:58:17,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:17,998 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 01:58:17,999 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 36 [2021-11-23 01:58:18,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:18,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:18,273 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 32 [2021-11-23 01:58:18,683 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 01:58:18,683 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 64 treesize of output 79 [2021-11-23 01:58:18,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:18,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:18,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:18,693 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 38 [2021-11-23 01:58:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:58:18,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:58:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045415086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886550156] [2021-11-23 01:58:18,963 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-23 01:58:18,963 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:58:18,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:58:18,964 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:58:18,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:58:19,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:19,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2021-11-23 01:58:19,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,222 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:58:19,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:19,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,258 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:58:19,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,279 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:58:19,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,332 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:58:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 01:58:19,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 01:58:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,424 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 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:58:19,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2021-11-23 01:58:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 55 [2021-11-23 01:58:19,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,555 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 69 treesize of output 58 [2021-11-23 01:58:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:58:19,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,611 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 58 treesize of output 55 [2021-11-23 01:58:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,795 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 140 [2021-11-23 01:58:19,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:19,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,813 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 106 [2021-11-23 01:58:19,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:19,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:58:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2021-11-23 01:58:20,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:20,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:20,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:20,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:20,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2021-11-23 01:58:20,260 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:58:20,260 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 17 treesize of output 23 [2021-11-23 01:58:20,284 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:58:20,284 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 17 treesize of output 21 [2021-11-23 01:58:20,393 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 [2021-11-23 01:58:20,401 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 [2021-11-23 01:58:20,410 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 [2021-11-23 01:58:20,447 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:58:20,447 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 27 treesize of output 34 [2021-11-23 01:58:20,457 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 [2021-11-23 01:58:20,488 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:58:20,488 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 27 treesize of output 34 [2021-11-23 01:58:20,559 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:58:20,559 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 50 treesize of output 61 [2021-11-23 01:58:20,588 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 13 treesize of output 9 [2021-11-23 01:58:20,635 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:58:20,636 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 50 treesize of output 61 [2021-11-23 01:58:20,784 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 [2021-11-23 01:58:20,792 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 [2021-11-23 01:58:20,857 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 [2021-11-23 01:58:21,138 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 [2021-11-23 01:58:21,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:21,163 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-23 01:58:21,163 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 94 [2021-11-23 01:58:21,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:21,193 INFO L354 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2021-11-23 01:58:21,194 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 91 [2021-11-23 01:58:22,288 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:58:22,289 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 17 treesize of output 23 [2021-11-23 01:58:22,316 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:58:22,316 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 17 treesize of output 21 [2021-11-23 01:58:22,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 01:58:22,398 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 [2021-11-23 01:58:22,408 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 [2021-11-23 01:58:22,441 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:58:22,442 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 27 treesize of output 34 [2021-11-23 01:58:22,463 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:58:22,463 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 27 treesize of output 34 [2021-11-23 01:58:22,473 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 [2021-11-23 01:58:22,527 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:58:22,528 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 50 treesize of output 61 [2021-11-23 01:58:22,547 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 13 treesize of output 9 [2021-11-23 01:58:22,591 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:58:22,591 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 50 treesize of output 61 [2021-11-23 01:58:22,979 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 [2021-11-23 01:58:22,987 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 [2021-11-23 01:58:22,996 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 [2021-11-23 01:58:23,336 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 [2021-11-23 01:58:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:23,372 INFO L354 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2021-11-23 01:58:23,372 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 106 [2021-11-23 01:58:23,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:23,396 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-23 01:58:23,396 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 91 [2021-11-23 01:58:23,776 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:58:23,777 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 17 treesize of output 23 [2021-11-23 01:58:23,805 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:58:23,805 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 17 treesize of output 21 [2021-11-23 01:58:23,880 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2021-11-23 01:58:23,887 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:58:30,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32484#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= ~i~0 0) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= |ULTIMATE.start_main_#t~ret24#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~head~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_#t~ret24#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (<= |#NULL.base| 0) (not (= (select |#valid| |ULTIMATE.start_create_item_~link#1.base|) 1)) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2021-11-23 01:58:30,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:58:30,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:58:30,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-11-23 01:58:30,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229447250] [2021-11-23 01:58:30,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:58:30,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 01:58:30,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:30,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 01:58:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2786, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 01:58:30,166 INFO L87 Difference]: Start difference. First operand 1221 states and 1666 transitions. Second operand has 29 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:58:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:32,627 INFO L93 Difference]: Finished difference Result 2210 states and 3021 transitions. [2021-11-23 01:58:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 01:58:32,628 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-23 01:58:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:32,641 INFO L225 Difference]: With dead ends: 2210 [2021-11-23 01:58:32,642 INFO L226 Difference]: Without dead ends: 2210 [2021-11-23 01:58:32,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=581, Invalid=6225, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 01:58:32,645 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 493 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:32,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 1711 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1721 Invalid, 0 Unknown, 499 Unchecked, 1.2s Time] [2021-11-23 01:58:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-11-23 01:58:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1751. [2021-11-23 01:58:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1563 states have (on average 1.436980166346769) internal successors, (2246), 1623 states have internal predecessors, (2246), 101 states have call successors, (101), 55 states have call predecessors, (101), 55 states have return successors, (101), 72 states have call predecessors, (101), 101 states have call successors, (101) [2021-11-23 01:58:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2448 transitions. [2021-11-23 01:58:32,699 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2448 transitions. Word has length 36 [2021-11-23 01:58:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:32,700 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 2448 transitions. [2021-11-23 01:58:32,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:58:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2448 transitions. [2021-11-23 01:58:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 01:58:32,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:32,702 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] [2021-11-23 01:58:32,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:32,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 01:58:32,927 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:58:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash 874143056, now seen corresponding path program 1 times [2021-11-23 01:58:32,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:32,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669345218] [2021-11-23 01:58:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:32,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:58:33,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669345218] [2021-11-23 01:58:33,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669345218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346076568] [2021-11-23 01:58:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:33,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:33,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:33,687 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:33,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 01:58:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 01:58:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:33,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 01:58:33,871 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 [2021-11-23 01:58:34,065 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 [2021-11-23 01:58:34,079 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 [2021-11-23 01:58:34,210 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-23 01:58:34,211 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 27 treesize of output 26 [2021-11-23 01:58:34,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:34,218 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 [2021-11-23 01:58:34,500 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-23 01:58:34,501 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 101 treesize of output 61 [2021-11-23 01:58:34,506 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-23 01:58:34,507 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 55 treesize of output 31 [2021-11-23 01:58:34,515 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 01:58:34,516 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 25 treesize of output 27 [2021-11-23 01:58:34,522 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 01:58:34,523 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 24 treesize of output 24 [2021-11-23 01:58:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:58:34,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:58:35,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346076568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:35,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1957562875] [2021-11-23 01:58:35,259 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-23 01:58:35,259 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:58:35,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:58:35,260 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:58:35,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:58:35,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2021-11-23 01:58:35,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,535 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:58:35,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:35,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,546 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:58:35,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:35,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,578 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 01:58:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 58 treesize of output 55 [2021-11-23 01:58:35,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,648 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 0 case distinctions, treesize of input 38 treesize of output 21 [2021-11-23 01:58:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 58 treesize of output 55 [2021-11-23 01:58:35,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 73 treesize of output 58 [2021-11-23 01:58:35,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 55 [2021-11-23 01:58:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,800 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 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 01:58:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,913 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 58 treesize of output 55 [2021-11-23 01:58:35,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,938 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 69 treesize of output 58 [2021-11-23 01:58:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:35,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:58:36,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:36,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:36,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,146 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 140 [2021-11-23 01:58:36,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:36,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:36,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,168 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 114 [2021-11-23 01:58:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 01:58:36,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2021-11-23 01:58:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:36,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:58:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2021-11-23 01:58:36,598 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:58:36,599 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 17 treesize of output 23 [2021-11-23 01:58:36,627 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:58:36,627 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 17 treesize of output 21 [2021-11-23 01:58:36,723 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 [2021-11-23 01:58:36,731 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 [2021-11-23 01:58:36,741 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 [2021-11-23 01:58:36,773 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:58:36,774 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 27 treesize of output 34 [2021-11-23 01:58:36,782 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 [2021-11-23 01:58:36,802 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:58:36,802 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 27 treesize of output 34 [2021-11-23 01:58:36,862 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:58:36,862 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 50 treesize of output 61 [2021-11-23 01:58:36,877 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 13 treesize of output 9 [2021-11-23 01:58:36,918 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:58:36,918 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 50 treesize of output 61 [2021-11-23 01:58:37,070 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 [2021-11-23 01:58:37,079 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 [2021-11-23 01:58:37,088 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 [2021-11-23 01:58:37,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:37,412 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-23 01:58:37,412 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 94 [2021-11-23 01:58:37,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:37,443 INFO L354 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2021-11-23 01:58:37,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 91 [2021-11-23 01:58:37,458 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 [2021-11-23 01:58:39,992 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:58:39,992 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 17 treesize of output 21 [2021-11-23 01:58:40,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 01:58:40,078 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 [2021-11-23 01:58:40,088 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 [2021-11-23 01:58:40,094 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 [2021-11-23 01:58:40,116 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 [2021-11-23 01:58:40,133 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:58:40,134 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 27 treesize of output 34 [2021-11-23 01:58:40,154 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-23 01:58:40,154 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 27 treesize of output 34 [2021-11-23 01:58:40,213 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:58:40,213 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 50 treesize of output 61 [2021-11-23 01:58:40,228 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 13 treesize of output 9 [2021-11-23 01:58:40,271 INFO L354 Elim1Store]: treesize reduction 68, result has 40.9 percent of original size [2021-11-23 01:58:40,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 61 [2021-11-23 01:58:40,784 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 [2021-11-23 01:58:40,793 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 [2021-11-23 01:58:40,802 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 [2021-11-23 01:58:41,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:41,156 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-11-23 01:58:41,157 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 94 [2021-11-23 01:58:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:41,189 INFO L354 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2021-11-23 01:58:41,190 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 91 [2021-11-23 01:58:41,207 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 [2021-11-23 01:58:41,637 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:58:41,637 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 17 treesize of output 23 [2021-11-23 01:58:41,663 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:58:41,663 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 17 treesize of output 21 [2021-11-23 01:58:41,747 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2021-11-23 01:58:41,750 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:58:47,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36693#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= ~i~0 0) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= |ULTIMATE.start_main_#t~ret24#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~head~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_#t~ret24#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2021-11-23 01:58:47,866 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:58:47,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:58:47,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 29 [2021-11-23 01:58:47,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761749816] [2021-11-23 01:58:47,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:58:47,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 01:58:47,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:47,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 01:58:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2999, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 01:58:47,868 INFO L87 Difference]: Start difference. First operand 1751 states and 2448 transitions. Second operand has 30 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:58:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:52,725 INFO L93 Difference]: Finished difference Result 3864 states and 5555 transitions. [2021-11-23 01:58:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 01:58:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-23 01:58:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:52,746 INFO L225 Difference]: With dead ends: 3864 [2021-11-23 01:58:52,746 INFO L226 Difference]: Without dead ends: 3864 [2021-11-23 01:58:52,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2607 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1286, Invalid=8026, Unknown=0, NotChecked=0, Total=9312 [2021-11-23 01:58:52,750 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 2376 mSDsluCounter, 2781 mSDsCounter, 0 mSdLazyCounter, 3013 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2376 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 3622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 3013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:52,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2376 Valid, 2341 Invalid, 3622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 3013 Invalid, 0 Unknown, 389 Unchecked, 1.8s Time] [2021-11-23 01:58:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-11-23 01:58:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 2349. [2021-11-23 01:58:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2113 states have (on average 1.4429720776147656) internal successors, (3049), 2173 states have internal predecessors, (3049), 132 states have call successors, (132), 72 states have call predecessors, (132), 72 states have return successors, (132), 103 states have call predecessors, (132), 132 states have call successors, (132) [2021-11-23 01:58:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3313 transitions. [2021-11-23 01:58:52,825 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3313 transitions. Word has length 36 [2021-11-23 01:58:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:52,826 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 3313 transitions. [2021-11-23 01:58:52,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:58:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3313 transitions. [2021-11-23 01:58:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 01:58:52,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:52,828 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] [2021-11-23 01:58:52,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:53,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 01:58:53,051 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:58:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1926280610, now seen corresponding path program 1 times [2021-11-23 01:58:53,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:53,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516788909] [2021-11-23 01:58:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:53,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:58:53,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:53,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516788909] [2021-11-23 01:58:53,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516788909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:53,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:53,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 01:58:53,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307529386] [2021-11-23 01:58:53,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:53,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 01:58:53,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 01:58:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-23 01:58:53,555 INFO L87 Difference]: Start difference. First operand 2349 states and 3313 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2021-11-23 01:58:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:54,687 INFO L93 Difference]: Finished difference Result 2811 states and 3987 transitions. [2021-11-23 01:58:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 01:58:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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 [2021-11-23 01:58:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:54,701 INFO L225 Difference]: With dead ends: 2811 [2021-11-23 01:58:54,701 INFO L226 Difference]: Without dead ends: 2811 [2021-11-23 01:58:54,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 01:58:54,702 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1033 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:54,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 712 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 01:58:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-11-23 01:58:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2350. [2021-11-23 01:58:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2114 states have (on average 1.4427625354777673) internal successors, (3050), 2174 states have internal predecessors, (3050), 132 states have call successors, (132), 72 states have call predecessors, (132), 72 states have return successors, (132), 103 states have call predecessors, (132), 132 states have call successors, (132) [2021-11-23 01:58:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3314 transitions. [2021-11-23 01:58:54,762 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3314 transitions. Word has length 36 [2021-11-23 01:58:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:54,763 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 3314 transitions. [2021-11-23 01:58:54,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2021-11-23 01:58:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3314 transitions. [2021-11-23 01:58:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 01:58:54,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:54,765 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] [2021-11-23 01:58:54,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-23 01:58:54,765 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:58:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2059579288, now seen corresponding path program 1 times [2021-11-23 01:58:54,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:54,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350574180] [2021-11-23 01:58:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:54,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:58:54,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350574180] [2021-11-23 01:58:54,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350574180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254085359] [2021-11-23 01:58:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:54,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:54,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:54,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:54,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 01:58:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 01:58:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:58:55,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:58:55,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254085359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:55,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:58:55,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2021-11-23 01:58:55,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780152584] [2021-11-23 01:58:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:55,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:58:55,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:58:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 01:58:55,232 INFO L87 Difference]: Start difference. First operand 2350 states and 3314 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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) [2021-11-23 01:58:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:55,634 INFO L93 Difference]: Finished difference Result 2696 states and 3680 transitions. [2021-11-23 01:58:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 01:58:55,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 37 [2021-11-23 01:58:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:55,648 INFO L225 Difference]: With dead ends: 2696 [2021-11-23 01:58:55,648 INFO L226 Difference]: Without dead ends: 2696 [2021-11-23 01:58:55,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-11-23 01:58:55,649 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 457 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:55,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 225 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:58:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-11-23 01:58:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2347. [2021-11-23 01:58:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2114 states have (on average 1.4072847682119205) internal successors, (2975), 2171 states have internal predecessors, (2975), 132 states have call successors, (132), 72 states have call predecessors, (132), 72 states have return successors, (132), 103 states have call predecessors, (132), 132 states have call successors, (132) [2021-11-23 01:58:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3239 transitions. [2021-11-23 01:58:55,703 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3239 transitions. Word has length 37 [2021-11-23 01:58:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:55,703 INFO L470 AbstractCegarLoop]: Abstraction has 2347 states and 3239 transitions. [2021-11-23 01:58:55,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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) [2021-11-23 01:58:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3239 transitions. [2021-11-23 01:58:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 01:58:55,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:55,706 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] [2021-11-23 01:58:55,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 01:58:55,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 01:58:55,931 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-11-23 01:58:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash 767913587, now seen corresponding path program 1 times [2021-11-23 01:58:55,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:55,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314099607] [2021-11-23 01:58:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:55,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:58:56,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:56,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314099607] [2021-11-23 01:58:56,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314099607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:58:56,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567248770] [2021-11-23 01:58:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:56,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:58:56,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:56,542 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:58:56,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4542b1-9e9a-4dc6-9f1c-6d33256e552c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 01:58:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 01:58:56,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:58:56,990 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 [2021-11-23 01:58:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:57,124 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 51 treesize of output 34 [2021-11-23 01:58:57,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:58:57,375 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-23 01:58:57,375 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 55 treesize of output 28 [2021-11-23 01:58:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:58:57,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:58:57,785 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 150 treesize of output 142 [2021-11-23 01:58:58,039 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 150 treesize of output 142