./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef4a52e45666a829b602608a46cff9c8137910dd58bdfaebe016ce17984d1ac8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:34:09,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:34:09,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:34:09,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:34:09,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:34:09,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:34:09,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:34:09,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:34:09,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:34:09,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:34:09,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:34:09,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:34:09,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:34:09,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:34:09,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:34:09,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:34:09,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:34:09,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:34:09,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:34:09,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:34:09,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:34:09,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:34:09,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:34:09,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:34:09,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:34:09,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:34:09,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:34:09,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:34:09,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:34:09,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:34:09,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:34:09,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:34:09,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:34:09,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:34:09,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:34:09,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:34:09,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:34:09,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:34:09,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:34:09,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:34:09,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:34:09,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:34:09,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:34:09,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:34:09,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:34:09,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:34:09,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:34:09,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:34:09,914 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:34:09,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:34:09,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:34:09,915 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:34:09,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:34:09,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:34:09,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:34:09,917 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:34:09,917 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:34:09,917 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:34:09,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:34:09,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:34:09,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:34:09,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:34:09,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:34:09,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:34:09,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:34:09,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:34:09,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:34:09,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:34:09,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:34:09,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:34:09,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:34:09,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef4a52e45666a829b602608a46cff9c8137910dd58bdfaebe016ce17984d1ac8 [2021-11-23 13:34:10,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:34:10,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:34:10,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:34:10,211 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:34:10,212 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:34:10,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2021-11-23 13:34:10,298 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/data/2d479edf9/b0117198aada4a6abca5ca6edc6345a1/FLAG22678bdf7 [2021-11-23 13:34:10,776 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:34:10,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2021-11-23 13:34:10,783 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/data/2d479edf9/b0117198aada4a6abca5ca6edc6345a1/FLAG22678bdf7 [2021-11-23 13:34:11,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/data/2d479edf9/b0117198aada4a6abca5ca6edc6345a1 [2021-11-23 13:34:11,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:34:11,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:34:11,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:34:11,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:34:11,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:34:11,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf76a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11, skipping insertion in model container [2021-11-23 13:34:11,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:34:11,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:34:11,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:34:11,357 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:34:11,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:34:11,384 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:34:11,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11 WrapperNode [2021-11-23 13:34:11,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:34:11,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:34:11,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:34:11,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:34:11,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,415 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-11-23 13:34:11,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:34:11,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:34:11,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:34:11,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:34:11,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:34:11,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:34:11,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:34:11,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:34:11,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (1/1) ... [2021-11-23 13:34:11,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:34:11,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:11,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:34:11,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:34:11,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:34:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:34:11,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:34:11,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:34:11,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:34:11,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:34:11,609 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:34:11,612 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:34:11,830 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:34:11,836 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:34:11,836 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:34:11,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:34:11 BoogieIcfgContainer [2021-11-23 13:34:11,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:34:11,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:34:11,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:34:11,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:34:11,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:34:11" (1/3) ... [2021-11-23 13:34:11,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b90c436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:34:11, skipping insertion in model container [2021-11-23 13:34:11,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:11" (2/3) ... [2021-11-23 13:34:11,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b90c436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:34:11, skipping insertion in model container [2021-11-23 13:34:11,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:34:11" (3/3) ... [2021-11-23 13:34:11,855 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2021-11-23 13:34:11,860 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:34:11,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-23 13:34:11,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:34:11,925 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 13:34:11,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-23 13:34:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 13:34:11,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:11,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 13:34:11,944 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-11-23 13:34:11,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:11,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578625813] [2021-11-23 13:34:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:11,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:12,104 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 13:34:12,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:12,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578625813] [2021-11-23 13:34:12,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578625813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:12,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:12,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:34:12,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026668028] [2021-11-23 13:34:12,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:12,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:34:12,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:34:12,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:34:12,142 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) 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 13:34:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:12,183 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-23 13:34:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:34:12,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 13:34:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:12,194 INFO L225 Difference]: With dead ends: 59 [2021-11-23 13:34:12,194 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 13:34:12,196 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 13:34:12,200 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:12,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:12,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 13:34:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-11-23 13:34:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 13:34:12,234 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-11-23 13:34:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:12,234 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 13:34:12,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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 13:34:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 13:34:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:34:12,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:12,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:34:12,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:34:12,236 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-11-23 13:34:12,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:12,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895647604] [2021-11-23 13:34:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:12,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:12,277 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 13:34:12,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895647604] [2021-11-23 13:34:12,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895647604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:12,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:12,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:34:12,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915517101] [2021-11-23 13:34:12,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:12,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:34:12,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:34:12,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:34:12,281 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:12,322 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-11-23 13:34:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:34:12,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:34:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:12,324 INFO L225 Difference]: With dead ends: 58 [2021-11-23 13:34:12,324 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 13:34:12,325 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 13:34:12,326 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:12,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 13:34:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-11-23 13:34:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-23 13:34:12,333 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-23 13:34:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:12,334 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 13:34:12,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-23 13:34:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:34:12,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:12,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:34:12,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:34:12,335 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-11-23 13:34:12,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:12,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054760509] [2021-11-23 13:34:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:12,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:12,426 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 13:34:12,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054760509] [2021-11-23 13:34:12,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054760509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:12,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:12,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:34:12,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668248125] [2021-11-23 13:34:12,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:12,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:34:12,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:12,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:34:12,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:34:12,429 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:12,497 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-23 13:34:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:34:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:34:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:12,499 INFO L225 Difference]: With dead ends: 32 [2021-11-23 13:34:12,499 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 13:34:12,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:34:12,501 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:12,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 13:34:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 13:34:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-23 13:34:12,510 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-23 13:34:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:12,522 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-23 13:34:12,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,523 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-23 13:34:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:34:12,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:12,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:34:12,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:34:12,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-11-23 13:34:12,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:12,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695751640] [2021-11-23 13:34:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:12,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:12,614 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 13:34:12,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:12,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695751640] [2021-11-23 13:34:12,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695751640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:12,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:12,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:34:12,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118153188] [2021-11-23 13:34:12,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:12,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:34:12,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:12,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:34:12,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:34:12,617 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:12,743 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-23 13:34:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:34:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 13:34:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:12,745 INFO L225 Difference]: With dead ends: 55 [2021-11-23 13:34:12,745 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 13:34:12,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:34:12,747 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:12,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 13:34:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-11-23 13:34:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-23 13:34:12,753 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-23 13:34:12,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:12,753 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 13:34:12,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-23 13:34:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:34:12,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:12,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:12,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:34:12,755 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:12,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-11-23 13:34:12,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:12,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43621459] [2021-11-23 13:34:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:12,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:12,837 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 13:34:12,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43621459] [2021-11-23 13:34:12,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43621459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:12,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:12,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:34:12,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148591098] [2021-11-23 13:34:12,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:12,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:34:12,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:34:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:34:12,843 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:12,940 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-23 13:34:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:34:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 13:34:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:12,956 INFO L225 Difference]: With dead ends: 60 [2021-11-23 13:34:12,956 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 13:34:12,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:34:12,958 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:12,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 13:34:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2021-11-23 13:34:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-23 13:34:12,964 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2021-11-23 13:34:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:12,965 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-23 13:34:12,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-23 13:34:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 13:34:12,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:12,966 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:12,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:34:12,966 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:12,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-11-23 13:34:12,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:12,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761849708] [2021-11-23 13:34:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:12,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:13,108 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 13:34:13,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761849708] [2021-11-23 13:34:13,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761849708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:13,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373343722] [2021-11-23 13:34:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:13,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:13,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:13,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:13,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:34:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:34:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:13,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:13,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373343722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:13,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:34:13,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-23 13:34:13,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441722166] [2021-11-23 13:34:13,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:13,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:34:13,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:34:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:34:13,313 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 13:34:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:13,421 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-11-23 13:34:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:34:13,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 13:34:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:13,424 INFO L225 Difference]: With dead ends: 75 [2021-11-23 13:34:13,425 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 13:34:13,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:34:13,436 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:13,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 62 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 13:34:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 39. [2021-11-23 13:34:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-23 13:34:13,458 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2021-11-23 13:34:13,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:13,459 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-23 13:34:13,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 13:34:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-23 13:34:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:34:13,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:13,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:13,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:13,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:13,674 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2021-11-23 13:34:13,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463487344] [2021-11-23 13:34:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:13,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:13,785 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 13:34:13,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463487344] [2021-11-23 13:34:13,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463487344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:13,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:13,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:34:13,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190124425] [2021-11-23 13:34:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:13,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:34:13,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:34:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:34:13,792 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 13:34:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:13,817 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-23 13:34:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:34:13,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 12 [2021-11-23 13:34:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:13,818 INFO L225 Difference]: With dead ends: 37 [2021-11-23 13:34:13,820 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 13:34:13,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:34:13,822 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:13,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 13:34:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 13:34:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 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 13:34:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-23 13:34:13,836 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 12 [2021-11-23 13:34:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:13,838 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-23 13:34:13,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 13:34:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-23 13:34:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:34:13,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:13,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:13,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:34:13,840 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088609, now seen corresponding path program 1 times [2021-11-23 13:34:13,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:13,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055677591] [2021-11-23 13:34:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:13,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:13,933 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 13:34:13,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:13,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055677591] [2021-11-23 13:34:13,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055677591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:13,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:13,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:34:13,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514418770] [2021-11-23 13:34:13,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:34:13,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:34:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:34:13,936 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 13:34:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:13,972 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-23 13:34:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:34:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 12 [2021-11-23 13:34:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:13,973 INFO L225 Difference]: With dead ends: 42 [2021-11-23 13:34:13,973 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 13:34:13,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:34:13,975 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:13,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 13:34:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-23 13:34:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 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 13:34:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-23 13:34:13,980 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-11-23 13:34:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:13,981 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-23 13:34:13,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 13:34:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-23 13:34:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:34:13,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:13,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:13,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:34:13,982 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:13,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1343012932, now seen corresponding path program 1 times [2021-11-23 13:34:13,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:13,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98225507] [2021-11-23 13:34:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:13,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:34:14,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:14,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98225507] [2021-11-23 13:34:14,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98225507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:14,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586474395] [2021-11-23 13:34:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:14,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:14,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:14,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:14,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:34:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:14,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:34:14,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:34:14,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:14,475 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 27 treesize of output 23 [2021-11-23 13:34:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:34:14,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586474395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:14,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:14,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 13:34:14,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790308844] [2021-11-23 13:34:14,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:14,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:34:14,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:34:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:34:14,583 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:14,668 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-23 13:34:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:34:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 13:34:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:14,670 INFO L225 Difference]: With dead ends: 46 [2021-11-23 13:34:14,670 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 13:34:14,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:34:14,671 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:14,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 42 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 13:34:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-11-23 13:34:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 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 13:34:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-23 13:34:14,676 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 18 [2021-11-23 13:34:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:14,676 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-23 13:34:14,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-23 13:34:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:34:14,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:14,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:14,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:14,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:14,903 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:14,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1315219428, now seen corresponding path program 1 times [2021-11-23 13:34:14,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:14,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186484532] [2021-11-23 13:34:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:14,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:34:14,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:14,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186484532] [2021-11-23 13:34:14,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186484532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:14,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927878212] [2021-11-23 13:34:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:14,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:14,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:14,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:14,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:34:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:34:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:34:15,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:34:15,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927878212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:15,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:15,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-23 13:34:15,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789573356] [2021-11-23 13:34:15,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:15,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:34:15,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:34:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:34:15,122 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 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 13:34:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:15,247 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-11-23 13:34:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:34:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 13:34:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:15,249 INFO L225 Difference]: With dead ends: 51 [2021-11-23 13:34:15,249 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 13:34:15,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:34:15,250 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:15,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 55 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 13:34:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-11-23 13:34:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 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 13:34:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-23 13:34:15,254 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 19 [2021-11-23 13:34:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:15,255 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-23 13:34:15,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 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 13:34:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-23 13:34:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 13:34:15,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:15,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:15,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 13:34:15,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:34:15,477 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:15,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2077891072, now seen corresponding path program 1 times [2021-11-23 13:34:15,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:15,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696072525] [2021-11-23 13:34:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:15,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:34:15,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:15,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696072525] [2021-11-23 13:34:15,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696072525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:15,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144560446] [2021-11-23 13:34:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:15,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:15,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:15,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:34:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:15,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:34:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:34:15,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:15,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144560446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:15,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:34:15,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 13:34:15,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721515919] [2021-11-23 13:34:15,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:15,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:34:15,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:15,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:34:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:34:15,819 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:15,834 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-11-23 13:34:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:34:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 13:34:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:15,835 INFO L225 Difference]: With dead ends: 45 [2021-11-23 13:34:15,835 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 13:34:15,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:34:15,836 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:15,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-23 13:34:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 13:34:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 13:34:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 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 13:34:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-11-23 13:34:15,841 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 21 [2021-11-23 13:34:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:15,841 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-11-23 13:34:15,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:15,842 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-11-23 13:34:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:34:15,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:15,843 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:15,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:16,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:16,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:16,071 INFO L85 PathProgramCache]: Analyzing trace with hash -9763705, now seen corresponding path program 1 times [2021-11-23 13:34:16,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:16,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947721293] [2021-11-23 13:34:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:16,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:34:16,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947721293] [2021-11-23 13:34:16,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947721293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218083326] [2021-11-23 13:34:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:16,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:16,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:16,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:16,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:34:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:16,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 13:34:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:16,331 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 11 treesize of output 7 [2021-11-23 13:34:16,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:34:16,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:34:16,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-11-23 13:34:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:16,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:16,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:34:16,469 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 28 treesize of output 26 [2021-11-23 13:34:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:16,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218083326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:16,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 10] total 19 [2021-11-23 13:34:16,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896330631] [2021-11-23 13:34:16,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:16,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 13:34:16,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:16,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 13:34:16,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:34:16,613 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 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 13:34:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:16,814 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-11-23 13:34:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:34:16,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 13:34:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:16,815 INFO L225 Difference]: With dead ends: 72 [2021-11-23 13:34:16,815 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 13:34:16,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:34:16,817 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:16,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 87 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 13:34:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2021-11-23 13:34:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 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 13:34:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-23 13:34:16,821 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 22 [2021-11-23 13:34:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:16,822 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-23 13:34:16,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 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 13:34:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-23 13:34:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:34:16,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:16,827 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:16,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:17,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 13:34:17,028 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1532050453, now seen corresponding path program 1 times [2021-11-23 13:34:17,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:17,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65503646] [2021-11-23 13:34:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:17,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:34:17,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65503646] [2021-11-23 13:34:17,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65503646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648861074] [2021-11-23 13:34:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:17,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:17,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:17,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:34:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:17,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:34:17,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:34:17,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:34:17,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648861074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:17,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:17,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-23 13:34:17,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214269525] [2021-11-23 13:34:17,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:17,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:34:17,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:34:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:34:17,237 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:17,296 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-11-23 13:34:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:34:17,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 13:34:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:17,298 INFO L225 Difference]: With dead ends: 104 [2021-11-23 13:34:17,298 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 13:34:17,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:34:17,299 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:17,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 84 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 13:34:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 60. [2021-11-23 13:34:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:34:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-23 13:34:17,305 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 22 [2021-11-23 13:34:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:17,305 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-23 13:34:17,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-23 13:34:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:34:17,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:17,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:17,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:17,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 13:34:17,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -248923733, now seen corresponding path program 1 times [2021-11-23 13:34:17,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:17,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006994305] [2021-11-23 13:34:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:17,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:34:17,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:17,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006994305] [2021-11-23 13:34:17,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006994305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781547996] [2021-11-23 13:34:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:17,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:17,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:17,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:34:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:17,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 13:34:17,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:17,715 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:34:17,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:34:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:34:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:34:17,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781547996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:17,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:17,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-23 13:34:18,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792288540] [2021-11-23 13:34:18,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:18,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:34:18,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:34:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:34:18,002 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 13:34:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:18,166 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-11-23 13:34:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:34:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 13:34:18,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:18,167 INFO L225 Difference]: With dead ends: 103 [2021-11-23 13:34:18,167 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 13:34:18,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:34:18,168 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 113 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:18,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 71 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 13:34:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2021-11-23 13:34:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 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 13:34:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-11-23 13:34:18,173 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 23 [2021-11-23 13:34:18,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:18,173 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-11-23 13:34:18,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 13:34:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-11-23 13:34:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 13:34:18,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:18,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:18,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:18,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:18,387 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash 631407484, now seen corresponding path program 2 times [2021-11-23 13:34:18,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:18,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558781484] [2021-11-23 13:34:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:18,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:34:18,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:18,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558781484] [2021-11-23 13:34:18,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558781484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:18,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059240369] [2021-11-23 13:34:18,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:34:18,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:18,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:18,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:18,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:34:18,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:34:18,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:34:18,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:34:18,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:18,593 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:34:18,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 13:34:18,598 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 20 treesize of output 18 [2021-11-23 13:34:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:34:19,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:19,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059240369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:19,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:34:19,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-11-23 13:34:19,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705400347] [2021-11-23 13:34:19,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:19,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:34:19,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:34:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:34:19,199 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 13:34:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:19,223 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-23 13:34:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:34:19,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 13:34:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:19,224 INFO L225 Difference]: With dead ends: 60 [2021-11-23 13:34:19,224 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 13:34:19,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:34:19,225 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:19,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 55 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2021-11-23 13:34:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 13:34:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-23 13:34:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:34:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-23 13:34:19,229 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 29 [2021-11-23 13:34:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:19,229 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-23 13:34:19,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 13:34:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-23 13:34:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 13:34:19,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:19,231 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:19,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:19,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 13:34:19,447 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash 39048524, now seen corresponding path program 2 times [2021-11-23 13:34:19,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:19,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760279833] [2021-11-23 13:34:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:19,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:34:19,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760279833] [2021-11-23 13:34:19,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760279833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753372645] [2021-11-23 13:34:19,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:34:19,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:19,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:19,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:34:19,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:34:19,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:34:19,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:34:19,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:34:19,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:34:19,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753372645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:19,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:19,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2021-11-23 13:34:19,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101404785] [2021-11-23 13:34:19,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:19,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:34:19,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:19,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:34:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:34:19,780 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:34:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:19,974 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-11-23 13:34:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:34:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 13:34:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:19,975 INFO L225 Difference]: With dead ends: 99 [2021-11-23 13:34:19,975 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 13:34:19,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:34:19,976 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:19,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 74 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 13:34:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2021-11-23 13:34:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-11-23 13:34:19,980 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 37 [2021-11-23 13:34:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:19,980 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-11-23 13:34:19,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:34:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-11-23 13:34:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:34:19,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:19,982 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:20,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:20,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:20,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1591695324, now seen corresponding path program 2 times [2021-11-23 13:34:20,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:20,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47487582] [2021-11-23 13:34:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:20,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:34:20,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47487582] [2021-11-23 13:34:20,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47487582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405440203] [2021-11-23 13:34:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:34:20,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:20,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:20,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:20,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:34:20,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:34:20,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:34:20,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:34:20,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:34:20,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:20,646 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 24 treesize of output 20 [2021-11-23 13:34:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:34:20,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405440203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:20,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:20,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2021-11-23 13:34:20,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395567290] [2021-11-23 13:34:20,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:20,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 13:34:20,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 13:34:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:34:20,826 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 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 13:34:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:21,002 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2021-11-23 13:34:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:34:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 13:34:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:21,003 INFO L225 Difference]: With dead ends: 115 [2021-11-23 13:34:21,004 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 13:34:21,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:34:21,005 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 171 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:21,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 111 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 13:34:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2021-11-23 13:34:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.103896103896104) internal successors, (85), 80 states have internal predecessors, (85), 0 states have call successors, (0), 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 13:34:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-11-23 13:34:21,009 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 39 [2021-11-23 13:34:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:21,009 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-11-23 13:34:21,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 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 13:34:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-11-23 13:34:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 13:34:21,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:21,011 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-23 13:34:21,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:21,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 13:34:21,212 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1454957583, now seen corresponding path program 3 times [2021-11-23 13:34:21,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973867420] [2021-11-23 13:34:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:21,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:34:21,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973867420] [2021-11-23 13:34:21,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973867420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955374289] [2021-11-23 13:34:21,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:34:21,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:21,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:21,321 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:21,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:34:21,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:34:21,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:34:21,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:34:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:21,395 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:34:21,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:34:21,405 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 10 treesize of output 8 [2021-11-23 13:34:21,647 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 13:34:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 13:34:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 13 proven. 84 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 13:34:21,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 13:34:23,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955374289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:23,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:23,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2021-11-23 13:34:23,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661751389] [2021-11-23 13:34:23,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:23,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 13:34:23,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 13:34:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:34:23,454 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 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 13:34:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:24,247 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2021-11-23 13:34:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 13:34:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 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 54 [2021-11-23 13:34:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:24,248 INFO L225 Difference]: With dead ends: 120 [2021-11-23 13:34:24,248 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 13:34:24,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1606, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 13:34:24,250 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 271 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:24,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 64 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 150 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-23 13:34:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 13:34:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-11-23 13:34:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 93 states have (on average 1.086021505376344) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 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 13:34:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-11-23 13:34:24,257 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 54 [2021-11-23 13:34:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:24,257 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-11-23 13:34:24,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 0 states have call successors, (0), 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 13:34:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-11-23 13:34:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 13:34:24,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:24,261 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 13:34:24,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:24,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 13:34:24,486 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash -372658966, now seen corresponding path program 3 times [2021-11-23 13:34:24,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:24,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138375723] [2021-11-23 13:34:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:24,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:34:24,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:24,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138375723] [2021-11-23 13:34:24,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138375723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:24,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333216415] [2021-11-23 13:34:24,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:34:24,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:24,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:24,587 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:24,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:34:24,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:34:24,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:34:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:34:24,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:24,689 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:34:24,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 13:34:24,692 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 20 treesize of output 18 [2021-11-23 13:34:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:34:25,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333216415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:25,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:34:25,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-11-23 13:34:25,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14277714] [2021-11-23 13:34:25,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:25,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:34:25,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:34:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:34:25,197 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:25,199 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-11-23 13:34:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:34:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 13:34:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:25,200 INFO L225 Difference]: With dead ends: 95 [2021-11-23 13:34:25,200 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 13:34:25,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:34:25,201 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:25,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-11-23 13:34:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 13:34:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-23 13:34:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.075268817204301) internal successors, (100), 94 states have internal predecessors, (100), 0 states have call successors, (0), 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 13:34:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-11-23 13:34:25,206 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 60 [2021-11-23 13:34:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:25,206 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-11-23 13:34:25,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-11-23 13:34:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 13:34:25,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:25,207 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:25,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:25,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:25,435 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash -592408120, now seen corresponding path program 1 times [2021-11-23 13:34:25,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:25,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215170830] [2021-11-23 13:34:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:25,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 13:34:25,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215170830] [2021-11-23 13:34:25,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215170830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791324087] [2021-11-23 13:34:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:25,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:25,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:25,507 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:25,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:34:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:34:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 13:34:25,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 13:34:25,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791324087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:25,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:25,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-23 13:34:25,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47249511] [2021-11-23 13:34:25,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:25,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:34:25,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:34:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:34:25,885 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 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 13:34:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:26,110 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-11-23 13:34:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:34:26,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 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 65 [2021-11-23 13:34:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:26,111 INFO L225 Difference]: With dead ends: 95 [2021-11-23 13:34:26,111 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 13:34:26,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:34:26,112 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:26,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 80 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 13:34:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-23 13:34:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.053763440860215) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:34:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2021-11-23 13:34:26,115 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 65 [2021-11-23 13:34:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2021-11-23 13:34:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 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 13:34:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2021-11-23 13:34:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 13:34:26,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:26,117 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:26,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:26,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:26,328 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash -600086545, now seen corresponding path program 2 times [2021-11-23 13:34:26,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:26,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959294070] [2021-11-23 13:34:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:26,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 13:34:26,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959294070] [2021-11-23 13:34:26,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959294070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88598210] [2021-11-23 13:34:26,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:34:26,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:26,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:26,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:26,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:34:26,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 13:34:26,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:34:26,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:34:26,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-23 13:34:27,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:27,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88598210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:27,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:34:27,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-23 13:34:27,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732099736] [2021-11-23 13:34:27,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:27,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:34:27,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:34:27,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:34:27,004 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:27,012 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-11-23 13:34:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:34:27,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 13:34:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:27,014 INFO L225 Difference]: With dead ends: 94 [2021-11-23 13:34:27,014 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 13:34:27,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:34:27,015 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:27,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2021-11-23 13:34:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 13:34:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-23 13:34:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 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 13:34:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-11-23 13:34:27,018 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 70 [2021-11-23 13:34:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:27,019 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-11-23 13:34:27,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-11-23 13:34:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 13:34:27,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:27,020 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-23 13:34:27,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:27,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:27,246 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:34:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1078992381, now seen corresponding path program 2 times [2021-11-23 13:34:27,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:27,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288333846] [2021-11-23 13:34:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:27,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 13:34:27,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:27,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288333846] [2021-11-23 13:34:27,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288333846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:34:27,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017391507] [2021-11-23 13:34:27,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:34:27,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:27,324 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:27,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:34:27,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 13:34:27,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:34:27,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:34:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:27,383 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:34:27,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:34:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 13:34:27,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 13:34:28,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017391507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:28,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:34:28,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 13:34:28,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331211851] [2021-11-23 13:34:28,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:28,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:34:28,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:34:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:34:28,070 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:28,110 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-11-23 13:34:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:34:28,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 13:34:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:28,111 INFO L225 Difference]: With dead ends: 77 [2021-11-23 13:34:28,111 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 13:34:28,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:34:28,112 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:28,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 13 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 13:34:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 13:34:28,113 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 13:34:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 13:34:28,114 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2021-11-23 13:34:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:28,114 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 13:34:28,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 13:34:28,115 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 13:34:28,117 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-11-23 13:34:28,117 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-11-23 13:34:28,118 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-11-23 13:34:28,118 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (4 of 8 remaining) [2021-11-23 13:34:28,118 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (3 of 8 remaining) [2021-11-23 13:34:28,118 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (2 of 8 remaining) [2021-11-23 13:34:28,118 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (1 of 8 remaining) [2021-11-23 13:34:28,119 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-11-23 13:34:28,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:28,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 13:34:28,335 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:28,336 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:34:28,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:34:28 BoogieIcfgContainer [2021-11-23 13:34:28,340 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:34:28,341 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:34:28,341 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:34:28,341 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:34:28,342 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:34:11" (3/4) ... [2021-11-23 13:34:28,344 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 13:34:28,355 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-11-23 13:34:28,356 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 13:34:28,356 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 13:34:28,356 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 13:34:28,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 13:34:28,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:34:28,400 INFO L158 Benchmark]: Toolchain (without parser) took 17253.98ms. Allocated memory was 109.1MB in the beginning and 232.8MB in the end (delta: 123.7MB). Free memory was 78.2MB in the beginning and 142.9MB in the end (delta: -64.7MB). Peak memory consumption was 59.6MB. Max. memory is 16.1GB. [2021-11-23 13:34:28,407 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 109.1MB. Free memory was 65.6MB in the beginning and 65.5MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:34:28,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.32ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 78.2MB in the beginning and 106.8MB in the end (delta: -28.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 13:34:28,408 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.61ms. Allocated memory is still 132.1MB. Free memory was 106.8MB in the beginning and 105.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:34:28,408 INFO L158 Benchmark]: Boogie Preprocessor took 21.44ms. Allocated memory is still 132.1MB. Free memory was 105.1MB in the beginning and 104.2MB in the end (delta: 909.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:34:28,409 INFO L158 Benchmark]: RCFGBuilder took 399.57ms. Allocated memory is still 132.1MB. Free memory was 104.2MB in the beginning and 92.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 13:34:28,410 INFO L158 Benchmark]: TraceAbstraction took 16500.63ms. Allocated memory was 132.1MB in the beginning and 232.8MB in the end (delta: 100.7MB). Free memory was 92.5MB in the beginning and 145.8MB in the end (delta: -53.3MB). Peak memory consumption was 50.2MB. Max. memory is 16.1GB. [2021-11-23 13:34:28,410 INFO L158 Benchmark]: Witness Printer took 59.06ms. Allocated memory is still 232.8MB. Free memory was 145.8MB in the beginning and 142.9MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:34:28,416 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 109.1MB. Free memory was 65.6MB in the beginning and 65.5MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.32ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 78.2MB in the beginning and 106.8MB in the end (delta: -28.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.61ms. Allocated memory is still 132.1MB. Free memory was 106.8MB in the beginning and 105.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.44ms. Allocated memory is still 132.1MB. Free memory was 105.1MB in the beginning and 104.2MB in the end (delta: 909.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 399.57ms. Allocated memory is still 132.1MB. Free memory was 104.2MB in the beginning and 92.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16500.63ms. Allocated memory was 132.1MB in the beginning and 232.8MB in the end (delta: 100.7MB). Free memory was 92.5MB in the beginning and 145.8MB in the end (delta: -53.3MB). Peak memory consumption was 50.2MB. Max. memory is 16.1GB. * Witness Printer took 59.06ms. Allocated memory is still 232.8MB. Free memory was 145.8MB in the beginning and 142.9MB 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: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: 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, 31 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 16.4s, OverallIterations: 22, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1433 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1433 mSDsluCounter, 1182 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 107 IncrementalHoareTripleChecker+Unchecked, 775 mSDsCounter, 189 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1505 IncrementalHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 189 mSolverCounterUnsat, 407 mSDtfsCounter, 1505 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1100 GetRequests, 873 SyntacticMatches, 7 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=18, InterpolantAutomatonStates: 157, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 342 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 1186 NumberOfCodeBlocks, 972 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1515 ConstructedInterpolants, 116 QuantifiedInterpolants, 13007 SizeOfPredicates, 64 NumberOfNonLiveVariables, 1421 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 47 InterpolantComputations, 12 PerfectInterpolantSequences, 1353/2620 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 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 13:34:28,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a50fd1b5-59f8-4db5-92cd-3504e27e6691/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE