./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/mult_array-alloca-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_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/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_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/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_9603a7a1-1f40-455a-92da-ca6177002fb8/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 516828c2d0e4e4ea6fd7a5826d09ca378c2c75a9f8159cf96c4b4e28ff76714b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:35:58,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:35:58,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:35:58,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:35:58,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:35:58,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:35:58,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:35:58,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:35:58,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:35:58,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:35:58,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:35:58,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:35:58,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:35:58,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:35:58,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:35:58,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:35:58,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:35:58,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:35:58,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:35:58,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:35:58,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:35:58,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:35:58,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:35:58,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:35:58,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:35:58,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:35:58,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:35:58,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:35:58,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:35:58,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:35:58,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:35:58,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:35:58,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:35:58,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:35:58,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:35:58,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:35:58,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:35:58,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:35:58,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:35:58,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:35:58,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:35:58,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:35:58,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:35:58,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:35:58,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:35:58,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:35:58,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:35:58,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:35:58,961 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:35:58,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:35:58,962 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:35:58,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:35:58,963 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:35:58,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:35:58,963 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:35:58,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:35:58,964 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:35:58,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:35:58,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:35:58,965 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:35:58,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:35:58,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:35:58,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:35:58,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:35:58,967 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:35:58,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:35:58,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:35:58,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:35:58,968 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:35:58,969 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:35:58,969 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:35:58,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:35:58,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:35:58,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:35:58,970 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:35:58,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:35:58,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:35:58,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:35:58,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:35:58,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:35:58,972 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:35:58,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:35:58,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:35:58,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:35:58,973 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_9603a7a1-1f40-455a-92da-ca6177002fb8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 516828c2d0e4e4ea6fd7a5826d09ca378c2c75a9f8159cf96c4b4e28ff76714b [2021-11-23 03:35:59,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:35:59,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:35:59,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:35:59,324 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:35:59,325 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:35:59,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i [2021-11-23 03:35:59,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/data/4cd572d13/7478fbd8955342d5aa13d5eeb22c6f30/FLAG9ebfc01a3 [2021-11-23 03:36:00,179 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:36:00,180 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i [2021-11-23 03:36:00,217 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/data/4cd572d13/7478fbd8955342d5aa13d5eeb22c6f30/FLAG9ebfc01a3 [2021-11-23 03:36:00,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/data/4cd572d13/7478fbd8955342d5aa13d5eeb22c6f30 [2021-11-23 03:36:00,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:36:00,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:36:00,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:00,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:36:00,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:36:00,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:00,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@754c07ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00, skipping insertion in model container [2021-11-23 03:36:00,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:00,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:36:00,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:36:00,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:36:00,852 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:36:00,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:36:00,954 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:36:00,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00 WrapperNode [2021-11-23 03:36:00,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:00,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:36:00,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:36:00,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:36:00,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:00,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,018 INFO L137 Inliner]: procedures = 115, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2021-11-23 03:36:01,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:36:01,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:36:01,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:36:01,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:36:01,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:36:01,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:36:01,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:36:01,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:36:01,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (1/1) ... [2021-11-23 03:36:01,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:01,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:36:01,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:36:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:36:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:36:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:36:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:36:01,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:36:01,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:36:01,347 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:36:01,349 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:36:01,591 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:36:01,744 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:36:01,745 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:36:01,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:01 BoogieIcfgContainer [2021-11-23 03:36:01,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:36:01,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:36:01,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:36:01,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:36:01,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:36:00" (1/3) ... [2021-11-23 03:36:01,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206c85e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:01, skipping insertion in model container [2021-11-23 03:36:01,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:00" (2/3) ... [2021-11-23 03:36:01,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206c85e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:01, skipping insertion in model container [2021-11-23 03:36:01,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:01" (3/3) ... [2021-11-23 03:36:01,768 INFO L111 eAbstractionObserver]: Analyzing ICFG mult_array-alloca-1.i [2021-11-23 03:36:01,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:36:01,776 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-23 03:36:01,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:36:01,869 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 03:36:01,869 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-23 03:36:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 states have internal predecessors, (18), 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 03:36:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:36:01,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:01,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:36:01,916 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash 107322, now seen corresponding path program 1 times [2021-11-23 03:36:01,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:01,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243892090] [2021-11-23 03:36:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:01,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:02,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:02,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509891600] [2021-11-23 03:36:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:02,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:02,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:02,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:02,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:36:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:36:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:02,246 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 03:36:02,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:02,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:02,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243892090] [2021-11-23 03:36:02,248 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509891600] [2021-11-23 03:36:02,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509891600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:02,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:02,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:36:02,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062173230] [2021-11-23 03:36:02,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:02,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:36:02,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:02,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:36:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:36:02,299 INFO L87 Difference]: Start difference. First operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:02,367 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-23 03:36:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:36:02,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 03:36:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:02,380 INFO L225 Difference]: With dead ends: 16 [2021-11-23 03:36:02,381 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:36:02,383 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 03:36:02,388 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:02,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:36:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:36:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:36:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 8 states have (on average 2.0) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-23 03:36:02,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2021-11-23 03:36:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:02,432 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-23 03:36:02,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-23 03:36:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:36:02,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:02,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:36:02,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 03:36:02,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:02,642 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash 3327913, now seen corresponding path program 1 times [2021-11-23 03:36:02,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:02,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947689620] [2021-11-23 03:36:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:02,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:02,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:02,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121982146] [2021-11-23 03:36:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:02,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:02,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:02,658 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:02,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:36:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:02,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:36:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:02,868 INFO L354 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2021-11-23 03:36:02,870 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 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-23 03:36:02,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-23 03:36:03,250 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 03:36:03,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:03,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947689620] [2021-11-23 03:36:03,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:03,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121982146] [2021-11-23 03:36:03,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121982146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:03,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:03,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:36:03,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076754797] [2021-11-23 03:36:03,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:03,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:36:03,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:03,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:36:03,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:36:03,269 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 03:36:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:03,296 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-23 03:36:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:36:03,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 03:36:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:03,299 INFO L225 Difference]: With dead ends: 17 [2021-11-23 03:36:03,300 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:36:03,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:36:03,303 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:03,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2021-11-23 03:36:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:36:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:36:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 2.0) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 03:36:03,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 4 [2021-11-23 03:36:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:03,321 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 03:36:03,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 03:36:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 03:36:03,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:36:03,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:03,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:36:03,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:03,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:03,546 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:03,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:03,547 INFO L85 PathProgramCache]: Analyzing trace with hash 3327912, now seen corresponding path program 1 times [2021-11-23 03:36:03,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:03,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378096535] [2021-11-23 03:36:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:03,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:03,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730752118] [2021-11-23 03:36:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:03,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:03,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:03,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:03,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:36:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:36:03,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:03,644 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:36:03,645 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:36:03,666 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 03:36:03,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:03,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:03,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378096535] [2021-11-23 03:36:03,667 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:03,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730752118] [2021-11-23 03:36:03,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730752118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:03,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:03,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:36:03,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694843795] [2021-11-23 03:36:03,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:03,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:36:03,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:36:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:36:03,671 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:03,761 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-23 03:36:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:36:03,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 03:36:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:03,762 INFO L225 Difference]: With dead ends: 15 [2021-11-23 03:36:03,762 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:36:03,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:36:03,764 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:03,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:36:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:36:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:36:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-23 03:36:03,770 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 4 [2021-11-23 03:36:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:03,771 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-23 03:36:03,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-23 03:36:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:36:03,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:03,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:36:03,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:03,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:03,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash 103207990, now seen corresponding path program 1 times [2021-11-23 03:36:03,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:03,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464080204] [2021-11-23 03:36:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:03,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:03,996 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:03,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520843621] [2021-11-23 03:36:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:03,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:03,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:04,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:36:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:04,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:36:04,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:04,122 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 03:36:04,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:04,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464080204] [2021-11-23 03:36:04,123 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:04,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520843621] [2021-11-23 03:36:04,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520843621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:04,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:04,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:36:04,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558062745] [2021-11-23 03:36:04,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:04,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:36:04,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:36:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:36:04,126 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.25) 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 03:36:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:04,168 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-23 03:36:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:36:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) 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 03:36:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:04,169 INFO L225 Difference]: With dead ends: 15 [2021-11-23 03:36:04,170 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:36:04,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:36:04,171 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:04,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:36:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:36:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:36:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-23 03:36:04,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-11-23 03:36:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:04,176 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-23 03:36:04,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) 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 03:36:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-23 03:36:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:36:04,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:04,178 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-11-23 03:36:04,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:04,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:04,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:04,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1096808337, now seen corresponding path program 1 times [2021-11-23 03:36:04,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:04,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777254542] [2021-11-23 03:36:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:04,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:04,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:04,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614127310] [2021-11-23 03:36:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:04,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:04,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:04,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:04,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:36:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:04,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:36:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:04,541 INFO L354 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2021-11-23 03:36:04,542 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 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-23 03:36:04,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-23 03:36:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:05,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:05,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777254542] [2021-11-23 03:36:05,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614127310] [2021-11-23 03:36:05,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614127310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948945904] [2021-11-23 03:36:05,307 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 03:36:05,307 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:05,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:05,320 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:05,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:05,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-11-23 03:36:05,855 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 25 treesize of output 21 [2021-11-23 03:36:06,157 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 25 treesize of output 21 [2021-11-23 03:36:06,247 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 25 treesize of output 21 [2021-11-23 03:36:06,318 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:09,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '235#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~arr2~0#1.base|) (<= |ULTIMATE.start_main_~fac~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet7#1|)) (<= 1 |ULTIMATE.start_main_~fac~0#1|) (<= |ULTIMATE.start_main_~arr~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~arr~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~arr~0#1.offset| 4)) (= |ULTIMATE.start_main_#t~malloc4#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc4#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_main_~arr~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~arr~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet7#1| 2147483647) (<= 0 |ULTIMATE.start_main_~arr2~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~arr2~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:36:09,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:09,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:36:09,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-23 03:36:09,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941085052] [2021-11-23 03:36:09,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:09,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:36:09,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:36:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:36:09,020 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:09,319 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-23 03:36:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:36:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:36:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:09,320 INFO L225 Difference]: With dead ends: 14 [2021-11-23 03:36:09,320 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 03:36:09,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:36:09,322 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:09,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-11-23 03:36:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 03:36:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-23 03:36:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-23 03:36:09,327 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 6 [2021-11-23 03:36:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:09,327 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-23 03:36:09,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-23 03:36:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:36:09,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:09,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:09,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 03:36:09,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:09,532 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:09,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash 358722608, now seen corresponding path program 1 times [2021-11-23 03:36:09,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:09,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990114664] [2021-11-23 03:36:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:09,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:09,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:09,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20371719] [2021-11-23 03:36:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:09,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:09,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:09,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:09,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:36:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:36:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:36:09,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:09,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990114664] [2021-11-23 03:36:09,710 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20371719] [2021-11-23 03:36:09,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20371719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:09,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:09,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:36:09,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632492931] [2021-11-23 03:36:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:09,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:36:09,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:36:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:36:09,713 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 03:36:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:09,751 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-23 03:36:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:36:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 03:36:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:09,752 INFO L225 Difference]: With dead ends: 12 [2021-11-23 03:36:09,753 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 03:36:09,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:36:09,754 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:09,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2021-11-23 03:36:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 03:36:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-23 03:36:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-23 03:36:09,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2021-11-23 03:36:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:09,759 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-23 03:36:09,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 03:36:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-23 03:36:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:36:09,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:09,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:09,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:09,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:36:09,980 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:09,981 INFO L85 PathProgramCache]: Analyzing trace with hash 358721759, now seen corresponding path program 1 times [2021-11-23 03:36:09,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:09,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005732927] [2021-11-23 03:36:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:09,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:09,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:09,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947160808] [2021-11-23 03:36:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:09,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:09,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:09,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:10,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:36:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:10,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:36:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:10,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:10,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:10,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005732927] [2021-11-23 03:36:10,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:10,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947160808] [2021-11-23 03:36:10,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947160808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:10,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:10,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:36:10,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519531692] [2021-11-23 03:36:10,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:10,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:36:10,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:10,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:36:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:36:10,192 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 03:36:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:10,315 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-11-23 03:36:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:36:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 03:36:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:10,316 INFO L225 Difference]: With dead ends: 11 [2021-11-23 03:36:10,317 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 03:36:10,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:36:10,318 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 11 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:10,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:36:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 03:36:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-23 03:36:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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 03:36:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-23 03:36:10,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-11-23 03:36:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:10,322 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-23 03:36:10,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 03:36:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-23 03:36:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:36:10,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:10,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:10,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:10,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:10,523 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1764527369, now seen corresponding path program 1 times [2021-11-23 03:36:10,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863233153] [2021-11-23 03:36:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:10,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:10,528 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:10,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917689014] [2021-11-23 03:36:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:10,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:10,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:10,529 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:10,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:36:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:36:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:10,598 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:36:10,599 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:36:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:36:10,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:10,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863233153] [2021-11-23 03:36:10,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917689014] [2021-11-23 03:36:10,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917689014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:10,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:10,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:36:10,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969319379] [2021-11-23 03:36:10,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:10,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:36:10,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:10,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:36:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:36:10,631 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:10,664 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-11-23 03:36:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:36:10,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 03:36:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:10,666 INFO L225 Difference]: With dead ends: 9 [2021-11-23 03:36:10,666 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 03:36:10,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 03:36:10,668 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:10,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:36:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 03:36:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 03:36:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-23 03:36:10,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2021-11-23 03:36:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:10,672 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-23 03:36:10,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-23 03:36:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:36:10,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:10,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:10,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:10,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:10,880 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1764527368, now seen corresponding path program 1 times [2021-11-23 03:36:10,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:10,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650650159] [2021-11-23 03:36:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:10,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:10,886 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:10,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073295845] [2021-11-23 03:36:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:10,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:10,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:10,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:10,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:36:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:36:10,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:10,971 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-11-23 03:36:10,971 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 1 case distinctions, treesize of input 15 treesize of output 21 [2021-11-23 03:36:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:36:11,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:11,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650650159] [2021-11-23 03:36:11,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:11,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073295845] [2021-11-23 03:36:11,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073295845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:11,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:11,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:36:11,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650645758] [2021-11-23 03:36:11,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:11,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:36:11,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:36:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:36:11,233 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:11,620 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-23 03:36:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:36:11,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 03:36:11,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:11,622 INFO L225 Difference]: With dead ends: 12 [2021-11-23 03:36:11,622 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 03:36:11,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:36:11,623 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:11,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-11-23 03:36:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 03:36:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 03:36:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 03:36:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-23 03:36:11,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-23 03:36:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:11,627 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-23 03:36:11,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-23 03:36:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:36:11,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:11,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:11,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:11,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:36:11,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-23 03:36:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash -929531189, now seen corresponding path program 1 times [2021-11-23 03:36:11,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291886800] [2021-11-23 03:36:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:11,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:11,850 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:11,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126416310] [2021-11-23 03:36:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:11,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:11,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:11,853 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:11,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:36:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:36:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:11,944 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-11-23 03:36:11,944 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 1 case distinctions, treesize of input 15 treesize of output 21 [2021-11-23 03:36:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:36:12,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:12,639 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 03:36:12,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291886800] [2021-11-23 03:36:12,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126416310] [2021-11-23 03:36:12,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126416310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474794245] [2021-11-23 03:36:12,642 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:36:12,642 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:12,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:12,643 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:12,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:12,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:12,824 INFO L244 Elim1Store]: Index analysis took 110 ms [2021-11-23 03:36:12,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-11-23 03:36:14,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:36:14,777 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 25 treesize of output 21 [2021-11-23 03:36:14,822 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 25 treesize of output 21 [2021-11-23 03:36:15,162 INFO L354 Elim1Store]: treesize reduction 134, result has 23.0 percent of original size [2021-11-23 03:36:15,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-11-23 03:36:15,347 INFO L354 Elim1Store]: treesize reduction 134, result has 23.0 percent of original size [2021-11-23 03:36:15,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-11-23 03:36:15,389 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:19,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '527#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~arr2~0#1.base|) (<= |ULTIMATE.start_main_~fac~0#1| 2147483647) (= (select |#valid| |ULTIMATE.start_main_~arr~0#1.base|) 1) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~arr~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~arr~0#1.base|) (+ (* (ite (and (< |ULTIMATE.start_main_~i~0#1| 0) (not (= (mod |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length~0#1|) 0))) (ite (< |ULTIMATE.start_main_~length~0#1| 0) (+ (mod |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length~0#1|) |ULTIMATE.start_main_~length~0#1|) (+ (mod |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length~0#1|) (* |ULTIMATE.start_main_~length~0#1| (- 1)))) (mod |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length~0#1|)) 4) |ULTIMATE.start_main_~arr~0#1.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_#t~malloc4#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc4#1.base|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~arr~0#1.offset| (* 4 (ite (and (< |ULTIMATE.start_main_~i~0#1| 0) (not (= (mod |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length~0#1|) 0))) (ite (< |ULTIMATE.start_main_~length~0#1| 0) (+ (mod |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length~0#1|) |ULTIMATE.start_main_~length~0#1|) (+ (mod |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length~0#1|) (* |ULTIMATE.start_main_~length~0#1| (- 1)))) (mod |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length~0#1|))) 4) (select |#length| |ULTIMATE.start_main_~arr~0#1.base|)) (<= 1 |ULTIMATE.start_main_~length~0#1|) (< |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~fac~0#1| |ULTIMATE.start_main_~length~0#1|)) (<= 0 |ULTIMATE.start_main_~arr~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~arr~0#1.offset|) (< (select |#length| |ULTIMATE.start_main_~arr2~0#1.base|) (+ |ULTIMATE.start_main_~arr2~0#1.offset| 4 (* 4 |ULTIMATE.start_main_~j~0#1|))) (<= 0 |ULTIMATE.start_main_~arr2~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~arr2~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:36:19,444 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:19,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:36:19,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-23 03:36:19,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057160846] [2021-11-23 03:36:19,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:19,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:36:19,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:36:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:36:19,447 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:20,522 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-11-23 03:36:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:36:20,522 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:36:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:20,523 INFO L225 Difference]: With dead ends: 11 [2021-11-23 03:36:20,523 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:36:20,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:36:20,525 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:20,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2021-11-23 03:36:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:36:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:36:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 03:36:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:36:20,527 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-11-23 03:36:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:20,527 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:36:20,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:36:20,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:36:20,531 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-11-23 03:36:20,532 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-11-23 03:36:20,532 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-11-23 03:36:20,532 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-11-23 03:36:20,533 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (2 of 7 remaining) [2021-11-23 03:36:20,533 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (1 of 7 remaining) [2021-11-23 03:36:20,533 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2021-11-23 03:36:20,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-23 03:36:20,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:36:20,751 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:20,753 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:36:20,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:36:20 BoogieIcfgContainer [2021-11-23 03:36:20,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:36:20,759 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:36:20,760 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:36:20,760 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:36:20,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:01" (3/4) ... [2021-11-23 03:36:20,763 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:36:20,776 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-11-23 03:36:20,777 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-23 03:36:20,777 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 03:36:20,777 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:36:20,831 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:36:20,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:36:20,832 INFO L158 Benchmark]: Toolchain (without parser) took 20447.27ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 67.0MB in the beginning and 42.5MB in the end (delta: 24.5MB). Peak memory consumption was 51.5MB. Max. memory is 16.1GB. [2021-11-23 03:36:20,833 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory is still 54.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:36:20,833 INFO L158 Benchmark]: CACSL2BoogieTranslator took 565.84ms. Allocated memory is still 100.7MB. Free memory was 66.8MB in the beginning and 69.5MB in the end (delta: -2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:36:20,834 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.17ms. Allocated memory is still 100.7MB. Free memory was 69.5MB in the beginning and 67.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:36:20,834 INFO L158 Benchmark]: Boogie Preprocessor took 76.10ms. Allocated memory is still 100.7MB. Free memory was 67.5MB in the beginning and 66.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:36:20,835 INFO L158 Benchmark]: RCFGBuilder took 651.89ms. Allocated memory is still 100.7MB. Free memory was 66.4MB in the beginning and 52.5MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 03:36:20,842 INFO L158 Benchmark]: TraceAbstraction took 19008.25ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 52.1MB in the beginning and 45.5MB in the end (delta: 6.6MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2021-11-23 03:36:20,843 INFO L158 Benchmark]: Witness Printer took 72.00ms. Allocated memory is still 127.9MB. Free memory was 45.5MB in the beginning and 42.5MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:36:20,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory is still 54.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 565.84ms. Allocated memory is still 100.7MB. Free memory was 66.8MB in the beginning and 69.5MB in the end (delta: -2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.17ms. Allocated memory is still 100.7MB. Free memory was 69.5MB in the beginning and 67.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.10ms. Allocated memory is still 100.7MB. Free memory was 67.5MB in the beginning and 66.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 651.89ms. Allocated memory is still 100.7MB. Free memory was 66.4MB in the beginning and 52.5MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 19008.25ms. Allocated memory was 100.7MB in the beginning and 127.9MB in the end (delta: 27.3MB). Free memory was 52.1MB in the beginning and 45.5MB in the end (delta: 6.6MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. * Witness Printer took 72.00ms. Allocated memory is still 127.9MB. Free memory was 45.5MB in the beginning and 42.5MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 512]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 18.9s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 66 IncrementalHoareTripleChecker+Unchecked, 31 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 148 IncrementalHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 35 mSDtfsCounter, 148 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 68 ConstructedInterpolants, 13 QuantifiedInterpolants, 1363 SizeOfPredicates, 30 NumberOfNonLiveVariables, 561 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 8/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 03:36:20,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9603a7a1-1f40-455a-92da-ca6177002fb8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE