./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.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_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/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_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/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_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:44:46,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:44:46,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:44:46,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:44:46,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:44:46,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:44:46,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:44:46,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:44:46,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:44:46,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:44:46,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:44:46,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:44:46,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:44:46,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:44:46,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:44:46,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:44:46,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:44:46,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:44:46,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:44:46,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:44:46,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:44:46,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:44:46,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:44:46,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:44:46,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:44:46,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:44:46,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:44:46,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:44:46,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:44:46,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:44:46,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:44:46,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:44:46,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:44:46,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:44:46,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:44:46,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:44:46,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:44:46,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:44:46,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:44:46,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:44:46,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:44:46,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:44:46,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:44:46,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:44:46,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:44:46,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:44:46,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:44:46,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:44:46,527 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:44:46,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:44:46,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:44:46,528 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:44:46,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:44:46,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:44:46,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:44:46,529 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:44:46,529 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:44:46,529 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:44:46,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:44:46,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:44:46,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:44:46,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:44:46,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:44:46,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:44:46,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:44:46,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:44:46,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:44:46,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:44:46,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:44:46,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:44:46,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:44:46,533 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_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2021-11-23 13:44:46,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:44:46,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:44:46,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:44:46,819 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:44:46,820 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:44:46,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-11-23 13:44:46,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/data/78ff3a1eb/9c242a21da5e4712b2987dadc9252406/FLAGd63a1f655 [2021-11-23 13:44:47,507 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:44:47,508 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-11-23 13:44:47,514 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/data/78ff3a1eb/9c242a21da5e4712b2987dadc9252406/FLAGd63a1f655 [2021-11-23 13:44:47,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/data/78ff3a1eb/9c242a21da5e4712b2987dadc9252406 [2021-11-23 13:44:47,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:44:47,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:44:47,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:44:47,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:44:47,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:44:47,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:44:47" (1/1) ... [2021-11-23 13:44:47,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ae350ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:47, skipping insertion in model container [2021-11-23 13:44:47,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:44:47" (1/1) ... [2021-11-23 13:44:47,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:44:47,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:44:48,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:44:48,053 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:44:48,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:44:48,088 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:44:48,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48 WrapperNode [2021-11-23 13:44:48,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:44:48,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:44:48,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:44:48,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:44:48,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,128 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-11-23 13:44:48,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:44:48,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:44:48,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:44:48,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:44:48,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:44:48,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:44:48,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:44:48,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:44:48,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (1/1) ... [2021-11-23 13:44:48,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:44:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:48,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:44:48,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:44:48,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:44:48,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:44:48,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:44:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:44:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:44:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:44:48,379 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:44:48,382 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:44:48,659 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:44:48,667 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:44:48,667 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:44:48,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:44:48 BoogieIcfgContainer [2021-11-23 13:44:48,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:44:48,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:44:48,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:44:48,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:44:48,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:44:47" (1/3) ... [2021-11-23 13:44:48,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60564be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:44:48, skipping insertion in model container [2021-11-23 13:44:48,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:48" (2/3) ... [2021-11-23 13:44:48,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60564be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:44:48, skipping insertion in model container [2021-11-23 13:44:48,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:44:48" (3/3) ... [2021-11-23 13:44:48,680 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2021-11-23 13:44:48,687 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:44:48,687 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-23 13:44:48,744 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:44:48,753 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 13:44:48,753 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-23 13:44:48,771 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 13:44:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 13:44:48,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:48,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 13:44:48,781 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 13:44:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-11-23 13:44:48,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:48,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669581867] [2021-11-23 13:44:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:48,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:48,993 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 13:44:48,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:48,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669581867] [2021-11-23 13:44:48,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669581867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:48,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:44:48,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:44:48,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302396938] [2021-11-23 13:44:48,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:49,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:44:49,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:44:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:44:49,046 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 13:44:49,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:49,100 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-23 13:44:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:44:49,103 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 13:44:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:49,112 INFO L225 Difference]: With dead ends: 59 [2021-11-23 13:44:49,113 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 13:44:49,115 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 13:44:49,120 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 13:44:49,121 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 13:44:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 13:44:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-11-23 13:44:49,160 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 13:44:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 13:44:49,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-11-23 13:44:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:49,164 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 13:44:49,164 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 13:44:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 13:44:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:44:49,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:49,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:44:49,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:44:49,166 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 13:44:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-11-23 13:44:49,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:49,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571705599] [2021-11-23 13:44:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:49,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:49,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:49,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571705599] [2021-11-23 13:44:49,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571705599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:49,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:44:49,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:44:49,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666734328] [2021-11-23 13:44:49,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:49,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:44:49,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:44:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:44:49,221 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 13:44:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:49,274 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-11-23 13:44:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:44:49,275 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 13:44:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:49,277 INFO L225 Difference]: With dead ends: 58 [2021-11-23 13:44:49,277 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 13:44:49,278 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 13:44:49,280 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 13:44:49,281 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 13:44:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 13:44:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-11-23 13:44:49,315 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 13:44:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-23 13:44:49,317 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-23 13:44:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:49,318 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 13:44:49,318 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 13:44:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-23 13:44:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:44:49,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:49,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:44:49,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:44:49,320 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 13:44:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-11-23 13:44:49,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:49,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631357288] [2021-11-23 13:44:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:49,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:49,436 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 13:44:49,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631357288] [2021-11-23 13:44:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631357288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:49,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:44:49,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:44:49,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260005812] [2021-11-23 13:44:49,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:49,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:44:49,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:44:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:44:49,440 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 13:44:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:49,486 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-23 13:44:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:44:49,487 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 13:44:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:49,488 INFO L225 Difference]: With dead ends: 32 [2021-11-23 13:44:49,488 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 13:44:49,488 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 13:44:49,490 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:49,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:44:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 13:44:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 13:44:49,496 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 13:44:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-23 13:44:49,497 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-23 13:44:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:49,498 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-23 13:44:49,498 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 13:44:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-23 13:44:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 13:44:49,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:49,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 13:44:49,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:44:49,500 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 13:44:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:49,501 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-11-23 13:44:49,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:49,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922943208] [2021-11-23 13:44:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:49,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:49,588 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 13:44:49,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:49,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922943208] [2021-11-23 13:44:49,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922943208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:49,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:44:49,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:44:49,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975254059] [2021-11-23 13:44:49,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:49,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:44:49,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:44:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:44:49,592 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 13:44:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:49,692 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-23 13:44:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:44:49,694 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 13:44:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:49,695 INFO L225 Difference]: With dead ends: 55 [2021-11-23 13:44:49,696 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 13:44:49,696 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 13:44:49,698 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 13:44:49,699 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 13:44:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 13:44:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-11-23 13:44:49,709 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 13:44:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-23 13:44:49,710 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-23 13:44:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:49,710 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 13:44:49,711 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 13:44:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-23 13:44:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:44:49,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:49,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:49,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:44:49,712 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 13:44:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-11-23 13:44:49,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:49,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593407883] [2021-11-23 13:44:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:49,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:49,791 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 13:44:49,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593407883] [2021-11-23 13:44:49,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593407883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:49,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:44:49,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:44:49,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067900067] [2021-11-23 13:44:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:49,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:44:49,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:44:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:44:49,794 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:44:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:49,813 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-23 13:44:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:44:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 13:44:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:49,815 INFO L225 Difference]: With dead ends: 31 [2021-11-23 13:44:49,815 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 13:44:49,816 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 13:44:49,817 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:49,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:44:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 13:44:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 13:44:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) 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 13:44:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 13:44:49,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2021-11-23 13:44:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:49,825 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 13:44:49,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:44:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 13:44:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:44:49,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:49,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:49,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:44:49,827 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:49,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2021-11-23 13:44:49,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:49,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568659213] [2021-11-23 13:44:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:49,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:49,893 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 13:44:49,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568659213] [2021-11-23 13:44:49,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568659213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:49,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:44:49,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:44:49,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383287521] [2021-11-23 13:44:49,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:49,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:44:49,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:44:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:44:49,896 INFO L87 Difference]: Start difference. First operand 31 states and 35 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 13:44:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:49,956 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-11-23 13:44:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:44:49,957 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 13:44:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:49,958 INFO L225 Difference]: With dead ends: 56 [2021-11-23 13:44:49,958 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 13:44:49,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 13:44:49,960 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:49,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:44:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 13:44:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-11-23 13:44:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3333333333333333) 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 13:44:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-23 13:44:49,966 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 7 [2021-11-23 13:44:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:49,967 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-23 13:44:49,967 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 13:44:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-23 13:44:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 13:44:49,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:49,968 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:49,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:44:49,968 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-11-23 13:44:49,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:49,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205269197] [2021-11-23 13:44:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:49,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:50,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:50,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205269197] [2021-11-23 13:44:50,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205269197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:50,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772555868] [2021-11-23 13:44:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:50,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:50,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:50,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:50,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:44:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:44:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:50,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:50,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772555868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:50,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:50,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-23 13:44:50,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057763284] [2021-11-23 13:44:50,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:50,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:44:50,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:44:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:44:50,282 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:44:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:50,389 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2021-11-23 13:44:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:44:50,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 13:44:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:50,393 INFO L225 Difference]: With dead ends: 120 [2021-11-23 13:44:50,393 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 13:44:50,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 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 13:44:50,395 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 131 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:50,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 129 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:44:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 13:44:50,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 46. [2021-11-23 13:44:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 13:44:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-11-23 13:44:50,403 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-11-23 13:44:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:50,404 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-11-23 13:44:50,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:44:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-11-23 13:44:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:44:50,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:50,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:50,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:50,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:50,621 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:50,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-11-23 13:44:50,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:50,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030623418] [2021-11-23 13:44:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:50,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 13:44:50,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:50,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030623418] [2021-11-23 13:44:50,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030623418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:50,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:44:50,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:44:50,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227243630] [2021-11-23 13:44:50,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:50,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:44:50,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:44:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:44:50,728 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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 13:44:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:50,804 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-11-23 13:44:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:44:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 11 [2021-11-23 13:44:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:50,805 INFO L225 Difference]: With dead ends: 63 [2021-11-23 13:44:50,805 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 13:44:50,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:44:50,807 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:50,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 42 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:44:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 13:44:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-11-23 13:44:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 13:44:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-23 13:44:50,813 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 11 [2021-11-23 13:44:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:50,813 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-23 13:44:50,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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 13:44:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-23 13:44:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:44:50,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:50,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:50,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:44:50,815 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088609, now seen corresponding path program 1 times [2021-11-23 13:44:50,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755954316] [2021-11-23 13:44:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:50,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:50,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755954316] [2021-11-23 13:44:50,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755954316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516304185] [2021-11-23 13:44:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:50,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:50,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:50,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:44:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:44:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:51,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:51,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516304185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:51,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:51,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-23 13:44:51,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512765] [2021-11-23 13:44:51,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:51,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:44:51,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:44:51,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:44:51,126 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 13:44:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:51,330 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-11-23 13:44:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:44:51,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 13:44:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:51,332 INFO L225 Difference]: With dead ends: 80 [2021-11-23 13:44:51,332 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 13:44:51,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:44:51,333 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:51,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 55 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:44:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 13:44:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2021-11-23 13:44:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.225) internal successors, (49), 43 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 13:44:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-23 13:44:51,340 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 12 [2021-11-23 13:44:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:51,341 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-23 13:44:51,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 13:44:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-23 13:44:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:44:51,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:51,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:51,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:51,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:51,563 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 13:44:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 2 times [2021-11-23 13:44:51,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:51,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869194246] [2021-11-23 13:44:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:51,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:51,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:51,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869194246] [2021-11-23 13:44:51,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869194246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:51,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:44:51,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:44:51,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291851648] [2021-11-23 13:44:51,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:51,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:44:51,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:51,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:44:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:44:51,671 INFO L87 Difference]: Start difference. First operand 44 states and 49 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 13:44:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:51,704 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-11-23 13:44:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:44:51,705 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 17 [2021-11-23 13:44:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:51,707 INFO L225 Difference]: With dead ends: 72 [2021-11-23 13:44:51,708 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 13:44:51,709 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 13:44:51,710 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:51,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:44:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 13:44:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-11-23 13:44:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.2) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 13:44:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-11-23 13:44:51,726 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 17 [2021-11-23 13:44:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:51,726 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-11-23 13:44:51,727 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 13:44:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-11-23 13:44:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:44:51,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:51,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:51,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:44:51,729 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2021-11-23 13:44:51,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:51,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855510467] [2021-11-23 13:44:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:51,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:51,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:51,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855510467] [2021-11-23 13:44:51,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855510467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:51,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664422736] [2021-11-23 13:44:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:51,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:51,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:51,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:51,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:44:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:44:51,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:52,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:52,250 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 13:44:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:52,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664422736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:52,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:52,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 13:44:52,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840682942] [2021-11-23 13:44:52,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:52,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:44:52,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:44:52,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:44:52,384 INFO L87 Difference]: Start difference. First operand 69 states and 78 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 13:44:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:52,487 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-11-23 13:44:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:44:52,490 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 23 [2021-11-23 13:44:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:52,491 INFO L225 Difference]: With dead ends: 76 [2021-11-23 13:44:52,492 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 13:44:52,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 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 13:44:52,493 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:52,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 49 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:44:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 13:44:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-11-23 13:44:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.196969696969697) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 13:44:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-11-23 13:44:52,509 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 23 [2021-11-23 13:44:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:52,509 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-11-23 13:44:52,509 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 13:44:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-11-23 13:44:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 13:44:52,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:52,512 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-11-23 13:44:52,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:52,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 13:44:52,728 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-11-23 13:44:52,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:52,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114213209] [2021-11-23 13:44:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:52,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:44:52,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114213209] [2021-11-23 13:44:52,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114213209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570167234] [2021-11-23 13:44:52,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:44:52,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:52,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:52,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:52,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:44:52,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:44:52,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:44:52,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:44:52,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:52,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:44:52,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570167234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:52,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:44:52,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-23 13:44:52,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629060316] [2021-11-23 13:44:52,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:52,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:44:52,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:44:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:44:52,990 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:44:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:53,088 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-23 13:44:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:44:53,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 13:44:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:53,099 INFO L225 Difference]: With dead ends: 84 [2021-11-23 13:44:53,099 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 13:44:53,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:44:53,100 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:53,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 56 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:44:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 13:44:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2021-11-23 13:44:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 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 13:44:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-11-23 13:44:53,105 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 25 [2021-11-23 13:44:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:53,105 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-11-23 13:44:53,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:44:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-11-23 13:44:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 13:44:53,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:53,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:53,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:53,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:53,313 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2021-11-23 13:44:53,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:53,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97985955] [2021-11-23 13:44:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:53,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:53,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97985955] [2021-11-23 13:44:53,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97985955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265980264] [2021-11-23 13:44:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:53,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:53,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:53,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:44:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:53,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:44:53,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:44:53,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:44:53,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265980264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:53,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:44:53,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 13:44:53,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486629169] [2021-11-23 13:44:53,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:53,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:44:53,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:53,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:44:53,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:44:53,748 INFO L87 Difference]: Start difference. First operand 59 states and 64 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 13:44:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:53,763 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-23 13:44:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:44:53,764 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 26 [2021-11-23 13:44:53,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:53,765 INFO L225 Difference]: With dead ends: 60 [2021-11-23 13:44:53,765 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 13:44:53,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 13:44:53,766 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 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 13:44:53,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-23 13:44:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 13:44:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-23 13:44:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 13:44:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-11-23 13:44:53,770 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 26 [2021-11-23 13:44:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:53,771 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-11-23 13:44:53,771 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 13:44:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-11-23 13:44:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 13:44:53,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:53,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:53,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:53,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:53,988 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:53,988 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2021-11-23 13:44:53,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:53,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160468885] [2021-11-23 13:44:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:53,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:44:54,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:54,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160468885] [2021-11-23 13:44:54,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160468885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:54,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445366747] [2021-11-23 13:44:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:54,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:54,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:54,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:54,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:44:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:54,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:44:54,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:54,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 13:44:54,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:44:54,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:44:54,455 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 13:44:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:54,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:54,555 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 14 treesize of output 12 [2021-11-23 13:44:54,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-23 13:44:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:44:54,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445366747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:54,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:54,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2021-11-23 13:44:54,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858529508] [2021-11-23 13:44:54,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:54,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 13:44:54,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:54,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 13:44:54,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:44:54,812 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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 13:44:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:55,153 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-11-23 13:44:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:44:55,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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) Word has length 27 [2021-11-23 13:44:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:55,155 INFO L225 Difference]: With dead ends: 97 [2021-11-23 13:44:55,155 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 13:44:55,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:44:55,157 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:55,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 131 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:44:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 13:44:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-11-23 13:44:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:44:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-11-23 13:44:55,162 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 27 [2021-11-23 13:44:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:55,162 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-11-23 13:44:55,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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 13:44:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-11-23 13:44:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 13:44:55,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:55,164 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:55,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:55,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 13:44:55,380 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 13:44:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2021-11-23 13:44:55,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:55,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177040836] [2021-11-23 13:44:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:55,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:55,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:55,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177040836] [2021-11-23 13:44:55,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177040836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222990532] [2021-11-23 13:44:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:55,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:55,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:55,463 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:55,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:44:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:55,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:44:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:55,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:44:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222990532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:55,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:55,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-23 13:44:55,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143785117] [2021-11-23 13:44:55,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:44:55,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:44:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:44:55,784 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 13:44:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:55,962 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-11-23 13:44:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:44:55,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 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 34 [2021-11-23 13:44:55,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:55,963 INFO L225 Difference]: With dead ends: 64 [2021-11-23 13:44:55,963 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 13:44:55,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:44:55,966 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:55,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:44:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 13:44:55,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-23 13:44:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 13:44:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-11-23 13:44:55,972 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 34 [2021-11-23 13:44:55,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:55,972 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-11-23 13:44:55,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 13:44:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-11-23 13:44:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 13:44:55,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:55,977 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:56,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:56,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 13:44:56,195 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2021-11-23 13:44:56,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:56,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332662990] [2021-11-23 13:44:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:56,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:44:56,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:56,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332662990] [2021-11-23 13:44:56,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332662990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:56,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133116729] [2021-11-23 13:44:56,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:44:56,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:56,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:56,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:56,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:44:56,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:44:56,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:44:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:44:56,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:56,417 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:44:56,418 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 13:44:56,421 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 13:44:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:44:57,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:44:57,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133116729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:44:57,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:44:57,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-11-23 13:44:57,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936327145] [2021-11-23 13:44:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:44:57,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:44:57,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:57,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:44:57,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:44:57,282 INFO L87 Difference]: Start difference. First operand 64 states and 67 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 13:44:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:57,307 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-11-23 13:44:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:44:57,307 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 39 [2021-11-23 13:44:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:57,308 INFO L225 Difference]: With dead ends: 63 [2021-11-23 13:44:57,308 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 13:44:57,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 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 13:44:57,309 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:57,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2021-11-23 13:44:57,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 13:44:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-23 13:44:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.1) internal successors, (66), 62 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 13:44:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-11-23 13:44:57,320 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 39 [2021-11-23 13:44:57,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:57,320 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-11-23 13:44:57,320 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 13:44:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-11-23 13:44:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 13:44:57,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:57,324 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:57,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 13:44:57,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 13:44:57,536 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2021-11-23 13:44:57,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:57,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100887669] [2021-11-23 13:44:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:57,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:44:57,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:57,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100887669] [2021-11-23 13:44:57,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100887669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:57,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354298225] [2021-11-23 13:44:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:57,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:57,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:57,607 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:57,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:44:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:57,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:44:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:44:57,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 13:44:57,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354298225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:57,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:57,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2021-11-23 13:44:57,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572794416] [2021-11-23 13:44:57,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:57,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:44:57,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:44:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:44:57,972 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 13:44:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:58,193 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-11-23 13:44:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 13:44:58,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 42 [2021-11-23 13:44:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:58,194 INFO L225 Difference]: With dead ends: 107 [2021-11-23 13:44:58,194 INFO L226 Difference]: Without dead ends: 107 [2021-11-23 13:44:58,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:44:58,195 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 192 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:58,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 67 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:44:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-23 13:44:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-11-23 13:44:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 13:44:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-11-23 13:44:58,199 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 42 [2021-11-23 13:44:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:58,199 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-11-23 13:44:58,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 13:44:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-11-23 13:44:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 13:44:58,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:58,200 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:58,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:58,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 13:44:58,412 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2021-11-23 13:44:58,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:58,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633700393] [2021-11-23 13:44:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:58,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 13:44:58,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:58,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633700393] [2021-11-23 13:44:58,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633700393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:58,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765189958] [2021-11-23 13:44:58,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:44:58,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:58,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:58,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:58,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:44:58,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:44:58,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:44:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:44:58,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:44:58,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:58,988 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 13:44:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:44:59,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765189958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:59,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:59,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2021-11-23 13:44:59,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074638822] [2021-11-23 13:44:59,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:59,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 13:44:59,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 13:44:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:44:59,240 INFO L87 Difference]: Start difference. First operand 79 states and 82 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 13:44:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:59,436 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-11-23 13:44:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:44:59,437 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 49 [2021-11-23 13:44:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:59,438 INFO L225 Difference]: With dead ends: 121 [2021-11-23 13:44:59,438 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 13:44:59,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 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 13:44:59,439 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 188 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:59,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 110 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:44:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 13:44:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2021-11-23 13:44:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.069767441860465) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 13:44:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-11-23 13:44:59,443 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 49 [2021-11-23 13:44:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:59,446 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-11-23 13:44:59,446 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 13:44:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-11-23 13:44:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 13:44:59,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:59,448 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-23 13:44:59,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:59,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 13:44:59,649 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:44:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2021-11-23 13:44:59,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:59,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516799766] [2021-11-23 13:44:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:59,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:44:59,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:59,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516799766] [2021-11-23 13:44:59,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516799766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:59,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209024086] [2021-11-23 13:44:59,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:44:59,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:59,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:59,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:59,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:44:59,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:44:59,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:44:59,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:44:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:45:00,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 13:45:00,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209024086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:00,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:00,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-11-23 13:45:00,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455867723] [2021-11-23 13:45:00,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:00,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:45:00,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:45:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:45:00,250 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 13:45:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:00,766 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2021-11-23 13:45:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 13:45:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 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 64 [2021-11-23 13:45:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:00,768 INFO L225 Difference]: With dead ends: 170 [2021-11-23 13:45:00,768 INFO L226 Difference]: Without dead ends: 170 [2021-11-23 13:45:00,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 13:45:00,770 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:00,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 113 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:45:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-23 13:45:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 110. [2021-11-23 13:45:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.0654205607476634) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 13:45:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-11-23 13:45:00,775 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 64 [2021-11-23 13:45:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:00,775 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-11-23 13:45:00,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 13:45:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-11-23 13:45:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 13:45:00,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:00,776 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 13:45:00,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:00,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:00,992 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2021-11-23 13:45:00,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:00,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218390035] [2021-11-23 13:45:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:00,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 13:45:01,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:01,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218390035] [2021-11-23 13:45:01,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218390035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:01,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772212165] [2021-11-23 13:45:01,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:45:01,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:01,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:01,095 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:01,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:45:01,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:45:01,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:45:01,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:01,174 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:45:01,174 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 13:45:01,179 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 13:45:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:45:01,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:45:01,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772212165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:45:01,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:45:01,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-11-23 13:45:01,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837266257] [2021-11-23 13:45:01,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:45:01,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:45:01,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:45:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:45:01,862 INFO L87 Difference]: Start difference. First operand 110 states and 114 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 13:45:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:01,864 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-11-23 13:45:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:45:01,865 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 75 [2021-11-23 13:45:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:01,866 INFO L225 Difference]: With dead ends: 109 [2021-11-23 13:45:01,866 INFO L226 Difference]: Without dead ends: 109 [2021-11-23 13:45:01,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:45:01,868 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:01,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 13:45:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-23 13:45:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-23 13:45:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0560747663551402) internal successors, (113), 108 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 13:45:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-11-23 13:45:01,878 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 75 [2021-11-23 13:45:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:01,878 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-11-23 13:45:01,878 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 13:45:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-11-23 13:45:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 13:45:01,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:01,880 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:45:01,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:02,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:02,096 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 13:45:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2021-11-23 13:45:02,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:02,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866520612] [2021-11-23 13:45:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:02,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 13:45:02,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:02,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866520612] [2021-11-23 13:45:02,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866520612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:02,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628782494] [2021-11-23 13:45:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:02,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:02,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:02,190 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:02,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:45:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:02,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:45:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 13:45:02,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 13:45:02,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628782494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:02,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:02,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-23 13:45:02,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017195263] [2021-11-23 13:45:02,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:02,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 13:45:02,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 13:45:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:45:02,682 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 13:45:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:02,935 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-11-23 13:45:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 13:45:02,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 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 80 [2021-11-23 13:45:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:02,936 INFO L225 Difference]: With dead ends: 112 [2021-11-23 13:45:02,936 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 13:45:02,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:45:02,938 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:02,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 64 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:45:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 13:45:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-11-23 13:45:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 13:45:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-11-23 13:45:02,942 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 80 [2021-11-23 13:45:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:02,942 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-11-23 13:45:02,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 13:45:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-11-23 13:45:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 13:45:02,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:02,943 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:45:02,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:03,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:03,160 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:03,160 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2021-11-23 13:45:03,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:03,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352498417] [2021-11-23 13:45:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:03,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 13:45:03,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352498417] [2021-11-23 13:45:03,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352498417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55696660] [2021-11-23 13:45:03,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:45:03,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:03,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:03,276 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:03,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:45:03,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 13:45:03,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:45:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-23 13:45:04,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:45:04,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55696660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:45:04,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:45:04,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-23 13:45:04,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586573424] [2021-11-23 13:45:04,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:45:04,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:45:04,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:45:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:45:04,119 INFO L87 Difference]: Start difference. First operand 109 states and 111 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 13:45:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:04,143 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-11-23 13:45:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:45:04,145 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 85 [2021-11-23 13:45:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:04,146 INFO L225 Difference]: With dead ends: 108 [2021-11-23 13:45:04,146 INFO L226 Difference]: Without dead ends: 92 [2021-11-23 13:45:04,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 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 13:45:04,147 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 13:45:04,148 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 13:45:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-23 13:45:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-23 13:45:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 13:45:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-11-23 13:45:04,151 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2021-11-23 13:45:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:04,151 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-11-23 13:45:04,152 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 13:45:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-11-23 13:45:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 13:45:04,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:04,153 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-23 13:45:04,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:04,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 13:45:04,378 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2021-11-23 13:45:04,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:04,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092983322] [2021-11-23 13:45:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:04,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:45:04,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:04,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092983322] [2021-11-23 13:45:04,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092983322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:04,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256684699] [2021-11-23 13:45:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:45:04,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:04,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:04,478 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:04,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:45:04,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 13:45:04,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:04,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:45:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:45:04,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:45:05,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256684699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:05,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:05,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-11-23 13:45:05,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528897792] [2021-11-23 13:45:05,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:05,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 13:45:05,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:05,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 13:45:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:45:05,005 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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 13:45:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:05,241 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2021-11-23 13:45:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:45:05,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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 91 [2021-11-23 13:45:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:05,243 INFO L225 Difference]: With dead ends: 158 [2021-11-23 13:45:05,244 INFO L226 Difference]: Without dead ends: 158 [2021-11-23 13:45:05,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:45:05,245 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 243 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:05,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 93 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:45:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-23 13:45:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 122. [2021-11-23 13:45:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 121 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 13:45:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2021-11-23 13:45:05,249 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 91 [2021-11-23 13:45:05,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:05,250 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2021-11-23 13:45:05,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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 13:45:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2021-11-23 13:45:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 13:45:05,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:05,251 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-23 13:45:05,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:05,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 13:45:05,472 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2021-11-23 13:45:05,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:05,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615290761] [2021-11-23 13:45:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:05,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 65 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-23 13:45:05,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:05,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615290761] [2021-11-23 13:45:05,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615290761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:05,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670919887] [2021-11-23 13:45:05,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:45:05,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:05,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:05,644 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:05,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 13:45:05,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:45:05,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:45:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 13:45:06,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 13:45:06,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670919887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:06,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:06,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 34 [2021-11-23 13:45:06,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28707742] [2021-11-23 13:45:06,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:06,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 13:45:06,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:06,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 13:45:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=794, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 13:45:06,851 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 13:45:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:08,210 INFO L93 Difference]: Finished difference Result 363 states and 389 transitions. [2021-11-23 13:45:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-23 13:45:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 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 121 [2021-11-23 13:45:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:08,218 INFO L225 Difference]: With dead ends: 363 [2021-11-23 13:45:08,218 INFO L226 Difference]: Without dead ends: 363 [2021-11-23 13:45:08,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2612, Invalid=6318, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 13:45:08,224 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 268 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:08,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 68 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:45:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-23 13:45:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2021-11-23 13:45:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0769230769230769) internal successors, (378), 351 states have internal predecessors, (378), 0 states have call successors, (0), 0 states 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 13:45:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 378 transitions. [2021-11-23 13:45:08,235 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 378 transitions. Word has length 121 [2021-11-23 13:45:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:08,236 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 378 transitions. [2021-11-23 13:45:08,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 13:45:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 378 transitions. [2021-11-23 13:45:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-23 13:45:08,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:08,239 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-23 13:45:08,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:08,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:08,467 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash -303332105, now seen corresponding path program 5 times [2021-11-23 13:45:08,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:08,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477901086] [2021-11-23 13:45:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:08,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2063 proven. 334 refuted. 0 times theorem prover too weak. 1910 trivial. 0 not checked. [2021-11-23 13:45:08,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477901086] [2021-11-23 13:45:08,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477901086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:08,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63198419] [2021-11-23 13:45:08,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:45:08,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:08,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:08,663 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:08,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 13:45:08,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 13:45:08,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:45:08,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2165 proven. 249 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2021-11-23 13:45:09,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2220 proven. 194 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2021-11-23 13:45:09,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63198419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:09,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:09,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 25 [2021-11-23 13:45:09,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589602950] [2021-11-23 13:45:09,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:09,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:45:09,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:09,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:45:09,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:45:09,935 INFO L87 Difference]: Start difference. First operand 352 states and 378 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 13:45:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:10,481 INFO L93 Difference]: Finished difference Result 352 states and 372 transitions. [2021-11-23 13:45:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:45:10,482 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 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 256 [2021-11-23 13:45:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:10,484 INFO L225 Difference]: With dead ends: 352 [2021-11-23 13:45:10,484 INFO L226 Difference]: Without dead ends: 352 [2021-11-23 13:45:10,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 13:45:10,486 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 158 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:10,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 70 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:45:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-23 13:45:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-23 13:45:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0598290598290598) internal successors, (372), 351 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 13:45:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 372 transitions. [2021-11-23 13:45:10,496 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 372 transitions. Word has length 256 [2021-11-23 13:45:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:10,497 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 372 transitions. [2021-11-23 13:45:10,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 13:45:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 372 transitions. [2021-11-23 13:45:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-23 13:45:10,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:10,502 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-23 13:45:10,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:10,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:10,716 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1597142136, now seen corresponding path program 6 times [2021-11-23 13:45:10,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:10,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951110495] [2021-11-23 13:45:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:10,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 2998 proven. 603 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-11-23 13:45:10,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951110495] [2021-11-23 13:45:10,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951110495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:10,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278097980] [2021-11-23 13:45:10,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:45:10,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:10,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:10,996 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:11,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 13:45:11,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-23 13:45:11,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:11,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:45:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3158 proven. 443 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-11-23 13:45:11,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3158 proven. 443 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-11-23 13:45:12,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278097980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:12,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:12,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2021-11-23 13:45:12,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345650841] [2021-11-23 13:45:12,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:12,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 13:45:12,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 13:45:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:45:12,377 INFO L87 Difference]: Start difference. First operand 352 states and 372 transitions. Second operand has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 13:45:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:12,848 INFO L93 Difference]: Finished difference Result 352 states and 367 transitions. [2021-11-23 13:45:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 13:45:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 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 281 [2021-11-23 13:45:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:12,851 INFO L225 Difference]: With dead ends: 352 [2021-11-23 13:45:12,851 INFO L226 Difference]: Without dead ends: 352 [2021-11-23 13:45:12,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 13:45:12,853 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:12,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 115 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:45:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-23 13:45:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-23 13:45:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0455840455840455) internal successors, (367), 351 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 13:45:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 367 transitions. [2021-11-23 13:45:12,864 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 367 transitions. Word has length 281 [2021-11-23 13:45:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:12,864 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 367 transitions. [2021-11-23 13:45:12,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 13:45:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 367 transitions. [2021-11-23 13:45:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-23 13:45:12,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:12,870 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-23 13:45:12,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:13,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 13:45:13,088 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 7 times [2021-11-23 13:45:13,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:13,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773413235] [2021-11-23 13:45:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:13,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 3902 proven. 971 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-23 13:45:13,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773413235] [2021-11-23 13:45:13,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773413235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31260130] [2021-11-23 13:45:13,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:45:13,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:13,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:13,359 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:13,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 13:45:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 13:45:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-23 13:45:14,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-23 13:45:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31260130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:14,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:14,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2021-11-23 13:45:14,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230665197] [2021-11-23 13:45:14,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:14,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 13:45:14,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 13:45:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:45:14,875 INFO L87 Difference]: Start difference. First operand 352 states and 367 transitions. Second operand has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 13:45:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:15,423 INFO L93 Difference]: Finished difference Result 352 states and 363 transitions. [2021-11-23 13:45:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 13:45:15,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 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 301 [2021-11-23 13:45:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:15,426 INFO L225 Difference]: With dead ends: 352 [2021-11-23 13:45:15,426 INFO L226 Difference]: Without dead ends: 352 [2021-11-23 13:45:15,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=681, Invalid=1971, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 13:45:15,428 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:15,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 119 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:45:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-23 13:45:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-23 13:45:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0341880341880343) internal successors, (363), 351 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 13:45:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 363 transitions. [2021-11-23 13:45:15,437 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 363 transitions. Word has length 301 [2021-11-23 13:45:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:15,437 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 363 transitions. [2021-11-23 13:45:15,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 13:45:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 363 transitions. [2021-11-23 13:45:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-23 13:45:15,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:15,443 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-23 13:45:15,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-23 13:45:15,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 13:45:15,667 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 8 times [2021-11-23 13:45:15,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630308306] [2021-11-23 13:45:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:15,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4599 proven. 1453 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-11-23 13:45:15,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:15,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630308306] [2021-11-23 13:45:15,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630308306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:15,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643798783] [2021-11-23 13:45:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:45:15,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:15,958 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:15,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 13:45:16,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:45:16,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:45:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-11-23 13:45:17,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-11-23 13:45:17,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643798783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:17,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:17,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2021-11-23 13:45:17,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924662888] [2021-11-23 13:45:17,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:17,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 13:45:17,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:17,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 13:45:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-11-23 13:45:17,750 INFO L87 Difference]: Start difference. First operand 352 states and 363 transitions. Second operand has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:45:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:18,622 INFO L93 Difference]: Finished difference Result 352 states and 360 transitions. [2021-11-23 13:45:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 13:45:18,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2021-11-23 13:45:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:18,625 INFO L225 Difference]: With dead ends: 352 [2021-11-23 13:45:18,625 INFO L226 Difference]: Without dead ends: 352 [2021-11-23 13:45:18,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1009, Invalid=2897, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 13:45:18,628 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 98 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:18,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:45:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-23 13:45:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-23 13:45:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0256410256410255) internal successors, (360), 351 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 13:45:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2021-11-23 13:45:18,638 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 316 [2021-11-23 13:45:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:18,639 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2021-11-23 13:45:18,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:45:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2021-11-23 13:45:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-23 13:45:18,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:18,645 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-23 13:45:18,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:18,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:18,864 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash -25370281, now seen corresponding path program 9 times [2021-11-23 13:45:18,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307458680] [2021-11-23 13:45:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:18,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 4868 proven. 2064 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-11-23 13:45:19,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:19,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307458680] [2021-11-23 13:45:19,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307458680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:19,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001434000] [2021-11-23 13:45:19,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:45:19,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:19,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:19,287 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:19,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 13:45:19,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 13:45:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:45:19,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 2324 proven. 245 refuted. 0 times theorem prover too weak. 5063 trivial. 0 not checked. [2021-11-23 13:45:20,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 2324 proven. 245 refuted. 0 times theorem prover too weak. 5063 trivial. 0 not checked. [2021-11-23 13:45:20,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001434000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:20,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:20,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 43 [2021-11-23 13:45:20,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409468247] [2021-11-23 13:45:20,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:20,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 13:45:20,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:20,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 13:45:20,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 13:45:20,907 INFO L87 Difference]: Start difference. First operand 352 states and 360 transitions. Second operand has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:45:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:24,321 INFO L93 Difference]: Finished difference Result 508 states and 526 transitions. [2021-11-23 13:45:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-23 13:45:24,322 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2021-11-23 13:45:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:24,324 INFO L225 Difference]: With dead ends: 508 [2021-11-23 13:45:24,325 INFO L226 Difference]: Without dead ends: 508 [2021-11-23 13:45:24,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4714 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3922, Invalid=13900, Unknown=0, NotChecked=0, Total=17822 [2021-11-23 13:45:24,332 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 928 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:24,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 192 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 13:45:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-23 13:45:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 412. [2021-11-23 13:45:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.0462287104622872) internal successors, (430), 411 states have internal predecessors, (430), 0 states have call successors, (0), 0 states 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 13:45:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 430 transitions. [2021-11-23 13:45:24,344 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 430 transitions. Word has length 326 [2021-11-23 13:45:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:24,344 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 430 transitions. [2021-11-23 13:45:24,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:45:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 430 transitions. [2021-11-23 13:45:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-11-23 13:45:24,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:24,347 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-11-23 13:45:24,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:24,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 13:45:24,547 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash -439414264, now seen corresponding path program 10 times [2021-11-23 13:45:24,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:24,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280818356] [2021-11-23 13:45:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:24,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 282 proven. 10317 refuted. 0 times theorem prover too weak. 998 trivial. 0 not checked. [2021-11-23 13:45:25,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280818356] [2021-11-23 13:45:25,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280818356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323771914] [2021-11-23 13:45:25,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:45:25,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:25,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:25,020 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:25,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 13:45:25,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:45:25,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 13:45:25,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 1243 proven. 9710 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-23 13:45:27,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 1243 proven. 9710 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-23 13:45:28,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323771914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:28,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:28,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 34, 34] total 68 [2021-11-23 13:45:28,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864264573] [2021-11-23 13:45:28,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:28,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-23 13:45:28,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-23 13:45:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=3249, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 13:45:28,659 INFO L87 Difference]: Start difference. First operand 412 states and 430 transitions. Second operand has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 13:45:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:36,165 INFO L93 Difference]: Finished difference Result 1333 states and 1429 transitions. [2021-11-23 13:45:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-11-23 13:45:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 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 391 [2021-11-23 13:45:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:36,174 INFO L225 Difference]: With dead ends: 1333 [2021-11-23 13:45:36,174 INFO L226 Difference]: Without dead ends: 1333 [2021-11-23 13:45:36,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 736 SyntacticMatches, 1 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51377 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=28784, Invalid=68248, Unknown=0, NotChecked=0, Total=97032 [2021-11-23 13:45:36,188 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 513 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:36,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 166 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 13:45:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-11-23 13:45:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1322. [2021-11-23 13:45:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.073429220287661) internal successors, (1418), 1321 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states 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 13:45:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1418 transitions. [2021-11-23 13:45:36,227 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1418 transitions. Word has length 391 [2021-11-23 13:45:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:36,228 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1418 transitions. [2021-11-23 13:45:36,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 13:45:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1418 transitions. [2021-11-23 13:45:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 912 [2021-11-23 13:45:36,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:36,244 INFO L514 BasicCegarLoop]: trace histogram [157, 156, 156, 156, 156, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-23 13:45:36,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-23 13:45:36,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:36,461 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:36,462 INFO L85 PathProgramCache]: Analyzing trace with hash 101068528, now seen corresponding path program 11 times [2021-11-23 13:45:36,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:36,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128553579] [2021-11-23 13:45:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:36,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 33501 proven. 2819 refuted. 0 times theorem prover too weak. 28357 trivial. 0 not checked. [2021-11-23 13:45:37,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128553579] [2021-11-23 13:45:37,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128553579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022693054] [2021-11-23 13:45:37,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:45:37,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:37,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:37,208 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:37,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 13:45:37,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-23 13:45:37,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 13:45:37,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 33683 proven. 2520 refuted. 0 times theorem prover too weak. 28474 trivial. 0 not checked. [2021-11-23 13:45:39,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 34354 proven. 1849 refuted. 0 times theorem prover too weak. 28474 trivial. 0 not checked. [2021-11-23 13:45:41,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022693054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:41,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:41,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 42 [2021-11-23 13:45:41,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68820403] [2021-11-23 13:45:41,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:41,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 13:45:41,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 13:45:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1383, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 13:45:41,009 INFO L87 Difference]: Start difference. First operand 1322 states and 1418 transitions. Second operand has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 13:45:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:43,413 INFO L93 Difference]: Finished difference Result 1322 states and 1407 transitions. [2021-11-23 13:45:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-23 13:45:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 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 911 [2021-11-23 13:45:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:43,422 INFO L225 Difference]: With dead ends: 1322 [2021-11-23 13:45:43,422 INFO L226 Difference]: Without dead ends: 1322 [2021-11-23 13:45:43,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1802 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2523, Invalid=9249, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 13:45:43,425 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 185 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:43,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 164 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 13:45:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-11-23 13:45:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1322. [2021-11-23 13:45:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.065102195306586) internal successors, (1407), 1321 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states 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 13:45:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1407 transitions. [2021-11-23 13:45:43,455 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1407 transitions. Word has length 911 [2021-11-23 13:45:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:43,456 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1407 transitions. [2021-11-23 13:45:43,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 13:45:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1407 transitions. [2021-11-23 13:45:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2021-11-23 13:45:43,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:43,467 INFO L514 BasicCegarLoop]: trace histogram [167, 166, 166, 166, 166, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-23 13:45:43,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:43,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:43,695 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1688945128, now seen corresponding path program 12 times [2021-11-23 13:45:43,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:43,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165340175] [2021-11-23 13:45:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:43,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 41263 proven. 3733 refuted. 0 times theorem prover too weak. 27906 trivial. 0 not checked. [2021-11-23 13:45:44,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165340175] [2021-11-23 13:45:44,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165340175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881820378] [2021-11-23 13:45:44,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:45:44,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:44,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:44,485 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:44,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 13:45:44,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-23 13:45:44,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 13:45:44,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 22608 proven. 1400 refuted. 0 times theorem prover too weak. 48894 trivial. 0 not checked. [2021-11-23 13:45:46,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 22523 proven. 1485 refuted. 0 times theorem prover too weak. 48894 trivial. 0 not checked. [2021-11-23 13:45:48,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881820378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:48,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:48,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 57 [2021-11-23 13:45:48,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946258896] [2021-11-23 13:45:48,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:48,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 13:45:48,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 13:45:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=2624, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 13:45:48,218 INFO L87 Difference]: Start difference. First operand 1322 states and 1407 transitions. Second operand has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 13:45:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:56,689 INFO L93 Difference]: Finished difference Result 1500 states and 1587 transitions. [2021-11-23 13:45:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-23 13:45:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 0 states have call successors, (0), 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 961 [2021-11-23 13:45:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:56,700 INFO L225 Difference]: With dead ends: 1500 [2021-11-23 13:45:56,700 INFO L226 Difference]: Without dead ends: 1500 [2021-11-23 13:45:56,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2133 GetRequests, 1889 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19547 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=12029, Invalid=48241, Unknown=0, NotChecked=0, Total=60270 [2021-11-23 13:45:56,709 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2357 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2357 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:56,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2357 Valid, 220 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 13:45:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-11-23 13:45:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1439. [2021-11-23 13:45:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0611961057023644) internal successors, (1526), 1438 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states 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 13:45:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1526 transitions. [2021-11-23 13:45:56,740 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1526 transitions. Word has length 961 [2021-11-23 13:45:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:56,741 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1526 transitions. [2021-11-23 13:45:56,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 13:45:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1526 transitions. [2021-11-23 13:45:56,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2021-11-23 13:45:56,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:56,754 INFO L514 BasicCegarLoop]: trace histogram [187, 186, 186, 186, 186, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-23 13:45:56,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:56,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-23 13:45:56,967 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:45:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:56,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1610252424, now seen corresponding path program 13 times [2021-11-23 13:45:56,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:56,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627976751] [2021-11-23 13:45:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:56,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 53705 proven. 4821 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-11-23 13:45:57,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627976751] [2021-11-23 13:45:57,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627976751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861493868] [2021-11-23 13:45:57,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:45:57,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:57,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:57,896 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:57,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 13:45:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:58,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2815 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 13:45:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 54480 proven. 4046 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-11-23 13:46:00,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 54480 proven. 4046 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-11-23 13:46:01,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861493868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:01,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:01,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 39 [2021-11-23 13:46:01,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848916021] [2021-11-23 13:46:01,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:01,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 13:46:01,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 13:46:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 13:46:01,999 INFO L87 Difference]: Start difference. First operand 1439 states and 1526 transitions. Second operand has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 13:46:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:03,559 INFO L93 Difference]: Finished difference Result 1439 states and 1516 transitions. [2021-11-23 13:46:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-23 13:46:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 0 states have call successors, (0), 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 1061 [2021-11-23 13:46:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:03,565 INFO L225 Difference]: With dead ends: 1439 [2021-11-23 13:46:03,565 INFO L226 Difference]: Without dead ends: 1439 [2021-11-23 13:46:03,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2223 GetRequests, 2108 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3976 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3641, Invalid=9931, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 13:46:03,567 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 130 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:03,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 293 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:46:03,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-23 13:46:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2021-11-23 13:46:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0542420027816413) internal successors, (1516), 1438 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states 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 13:46:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1516 transitions. [2021-11-23 13:46:03,594 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1516 transitions. Word has length 1061 [2021-11-23 13:46:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:03,596 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1516 transitions. [2021-11-23 13:46:03,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 0 states have call successors, (0), 0 states 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 13:46:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1516 transitions. [2021-11-23 13:46:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1097 [2021-11-23 13:46:03,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:03,608 INFO L514 BasicCegarLoop]: trace histogram [194, 193, 193, 193, 193, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-23 13:46:03,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-23 13:46:03,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:03,835 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:46:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1882823689, now seen corresponding path program 14 times [2021-11-23 13:46:03,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716147849] [2021-11-23 13:46:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:03,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 62243 proven. 6098 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-11-23 13:46:04,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716147849] [2021-11-23 13:46:04,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716147849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621371635] [2021-11-23 13:46:04,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:46:04,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:04,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:04,672 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:04,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 13:46:05,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:46:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:05,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:46:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 63159 proven. 5182 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-11-23 13:46:06,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 63159 proven. 5182 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-11-23 13:46:08,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621371635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:08,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:08,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 42 [2021-11-23 13:46:08,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495083221] [2021-11-23 13:46:08,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:08,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 13:46:08,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 13:46:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 13:46:08,499 INFO L87 Difference]: Start difference. First operand 1439 states and 1516 transitions. Second operand has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 13:46:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:10,393 INFO L93 Difference]: Finished difference Result 1439 states and 1507 transitions. [2021-11-23 13:46:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-23 13:46:10,394 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 0 states have call successors, (0), 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 1096 [2021-11-23 13:46:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:10,402 INFO L225 Difference]: With dead ends: 1439 [2021-11-23 13:46:10,402 INFO L226 Difference]: Without dead ends: 1439 [2021-11-23 13:46:10,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2308 GetRequests, 2177 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4754, Invalid=12802, Unknown=0, NotChecked=0, Total=17556 [2021-11-23 13:46:10,405 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 138 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:10,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 220 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:46:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-23 13:46:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2021-11-23 13:46:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0479833101529903) internal successors, (1507), 1438 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states 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 13:46:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1507 transitions. [2021-11-23 13:46:10,432 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1507 transitions. Word has length 1096 [2021-11-23 13:46:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:10,434 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1507 transitions. [2021-11-23 13:46:10,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 13:46:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1507 transitions. [2021-11-23 13:46:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2021-11-23 13:46:10,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:10,447 INFO L514 BasicCegarLoop]: trace histogram [200, 199, 199, 199, 199, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-23 13:46:10,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:10,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 13:46:10,672 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:46:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash -473738113, now seen corresponding path program 15 times [2021-11-23 13:46:10,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:10,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407350617] [2021-11-23 13:46:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:10,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 70526 proven. 7579 refuted. 0 times theorem prover too weak. 25487 trivial. 0 not checked. [2021-11-23 13:46:11,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:11,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407350617] [2021-11-23 13:46:11,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407350617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:11,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846857317] [2021-11-23 13:46:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:46:11,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:11,630 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:11,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 13:46:12,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-23 13:46:12,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:12,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 13:46:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 20238 proven. 1199 refuted. 0 times theorem prover too weak. 82155 trivial. 0 not checked. [2021-11-23 13:46:14,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 20238 proven. 1199 refuted. 0 times theorem prover too weak. 82155 trivial. 0 not checked. [2021-11-23 13:46:15,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846857317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:15,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:15,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 64 [2021-11-23 13:46:15,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509843014] [2021-11-23 13:46:15,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:15,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 13:46:15,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 13:46:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3227, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 13:46:15,664 INFO L87 Difference]: Start difference. First operand 1439 states and 1507 transitions. Second operand has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 13:46:21,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:21,840 INFO L93 Difference]: Finished difference Result 1846 states and 1926 transitions. [2021-11-23 13:46:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-11-23 13:46:21,841 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 0 states have call successors, (0), 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 1126 [2021-11-23 13:46:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:21,847 INFO L225 Difference]: With dead ends: 1846 [2021-11-23 13:46:21,847 INFO L226 Difference]: Without dead ends: 1846 [2021-11-23 13:46:21,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2217 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17819 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=12497, Invalid=48265, Unknown=0, NotChecked=0, Total=60762 [2021-11-23 13:46:21,850 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1288 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:21,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1288 Valid, 375 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2703 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 13:46:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-11-23 13:46:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1489. [2021-11-23 13:46:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.0477150537634408) internal successors, (1559), 1488 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states 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 13:46:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1559 transitions. [2021-11-23 13:46:21,878 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1559 transitions. Word has length 1126 [2021-11-23 13:46:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:21,879 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 1559 transitions. [2021-11-23 13:46:21,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 13:46:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1559 transitions. [2021-11-23 13:46:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1202 [2021-11-23 13:46:21,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:21,894 INFO L514 BasicCegarLoop]: trace histogram [215, 214, 214, 214, 214, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-11-23 13:46:21,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:22,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 13:46:22,116 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:46:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash 72847848, now seen corresponding path program 16 times [2021-11-23 13:46:22,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:22,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50198199] [2021-11-23 13:46:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:22,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 119342 backedges. 84238 proven. 9279 refuted. 0 times theorem prover too weak. 25825 trivial. 0 not checked. [2021-11-23 13:46:23,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50198199] [2021-11-23 13:46:23,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50198199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236800102] [2021-11-23 13:46:23,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:46:23,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:23,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:23,140 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:23,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 13:46:27,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:46:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 3151 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 13:46:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 119342 backedges. 2726 proven. 111184 refuted. 0 times theorem prover too weak. 5432 trivial. 0 not checked. [2021-11-23 13:46:31,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 119342 backedges. 2726 proven. 111184 refuted. 0 times theorem prover too weak. 5432 trivial. 0 not checked. [2021-11-23 13:46:34,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236800102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:34,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:34,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 54, 54] total 128 [2021-11-23 13:46:34,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665469011] [2021-11-23 13:46:34,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:34,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-23 13:46:34,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-23 13:46:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2867, Invalid=13389, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 13:46:34,805 INFO L87 Difference]: Start difference. First operand 1489 states and 1559 transitions. Second operand has 128 states, 128 states have (on average 7.2578125) internal successors, (929), 128 states have internal predecessors, (929), 0 states have call successors, (0), 0 states 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 13:47:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:14,779 INFO L93 Difference]: Finished difference Result 4680 states and 4984 transitions. [2021-11-23 13:47:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 765 states. [2021-11-23 13:47:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 7.2578125) internal successors, (929), 128 states have internal predecessors, (929), 0 states have call successors, (0), 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 1201 [2021-11-23 13:47:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:14,797 INFO L225 Difference]: With dead ends: 4680 [2021-11-23 13:47:14,797 INFO L226 Difference]: Without dead ends: 4680 [2021-11-23 13:47:14,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3192 GetRequests, 2304 SyntacticMatches, 1 SemanticMatches, 887 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343111 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=100628, Invalid=688804, Unknown=0, NotChecked=0, Total=789432 [2021-11-23 13:47:14,838 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 5451 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 12547 mSolverCounterSat, 1609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5451 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 14156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1609 IncrementalHoareTripleChecker+Valid, 12547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:14,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5451 Valid, 513 Invalid, 14156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1609 Valid, 12547 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 13:47:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4680 states. [2021-11-23 13:47:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4680 to 3135. [2021-11-23 13:47:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 1.05743458838545) internal successors, (3314), 3134 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states 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 13:47:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 3314 transitions. [2021-11-23 13:47:14,912 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 3314 transitions. Word has length 1201 [2021-11-23 13:47:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:14,913 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 3314 transitions. [2021-11-23 13:47:14,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 7.2578125) internal successors, (929), 128 states have internal predecessors, (929), 0 states have call successors, (0), 0 states 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 13:47:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 3314 transitions. [2021-11-23 13:47:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2288 [2021-11-23 13:47:14,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:14,960 INFO L514 BasicCegarLoop]: trace histogram [414, 413, 413, 413, 413, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-23 13:47:14,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-23 13:47:15,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-23 13:47:15,167 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:47:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1060022564, now seen corresponding path program 17 times [2021-11-23 13:47:15,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:15,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710146979] [2021-11-23 13:47:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:15,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 442336 backedges. 228325 proven. 11213 refuted. 0 times theorem prover too weak. 202798 trivial. 0 not checked. [2021-11-23 13:47:17,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710146979] [2021-11-23 13:47:17,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710146979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:47:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391423226] [2021-11-23 13:47:17,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:47:17,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:47:17,494 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:47:17,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 13:47:19,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-23 13:47:19,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:47:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 13:47:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:47:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 442336 backedges. 227842 proven. 11334 refuted. 0 times theorem prover too weak. 203160 trivial. 0 not checked. [2021-11-23 13:47:23,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:47:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 442336 backedges. 230487 proven. 8689 refuted. 0 times theorem prover too weak. 203160 trivial. 0 not checked. [2021-11-23 13:47:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391423226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:47:26,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:47:26,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 36] total 64 [2021-11-23 13:47:26,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323252190] [2021-11-23 13:47:26,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:47:26,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 13:47:26,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 13:47:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3267, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 13:47:26,927 INFO L87 Difference]: Start difference. First operand 3135 states and 3314 transitions. Second operand has 64 states, 64 states have (on average 6.40625) internal successors, (410), 64 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 13:47:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:33,437 INFO L93 Difference]: Finished difference Result 3135 states and 3295 transitions. [2021-11-23 13:47:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-11-23 13:47:33,437 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.40625) internal successors, (410), 64 states have internal predecessors, (410), 0 states have call successors, (0), 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 2287 [2021-11-23 13:47:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:33,452 INFO L225 Difference]: With dead ends: 3135 [2021-11-23 13:47:33,452 INFO L226 Difference]: Without dead ends: 3135 [2021-11-23 13:47:33,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4762 GetRequests, 4544 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12329 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=10755, Invalid=37425, Unknown=0, NotChecked=0, Total=48180 [2021-11-23 13:47:33,459 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 296 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 4397 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 4466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:33,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 228 Invalid, 4466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4397 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 13:47:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-11-23 13:47:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3135. [2021-11-23 13:47:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 1.051372048500319) internal successors, (3295), 3134 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states 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 13:47:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 3295 transitions. [2021-11-23 13:47:33,512 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 3295 transitions. Word has length 2287 [2021-11-23 13:47:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:33,513 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 3295 transitions. [2021-11-23 13:47:33,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.40625) internal successors, (410), 64 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 13:47:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 3295 transitions. [2021-11-23 13:47:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2368 [2021-11-23 13:47:33,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:33,590 INFO L514 BasicCegarLoop]: trace histogram [430, 429, 429, 429, 429, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-23 13:47:33,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 13:47:33,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 13:47:33,816 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:47:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:33,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1427472996, now seen corresponding path program 18 times [2021-11-23 13:47:33,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:33,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102128703] [2021-11-23 13:47:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:33,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 476504 backedges. 261492 proven. 13396 refuted. 0 times theorem prover too weak. 201616 trivial. 0 not checked. [2021-11-23 13:47:36,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:36,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102128703] [2021-11-23 13:47:36,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102128703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:47:36,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880074577] [2021-11-23 13:47:36,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:47:36,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:36,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:47:36,987 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:47:36,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 13:47:44,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2021-11-23 13:47:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:47:44,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 13:47:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:47:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 476504 backedges. 104361 proven. 4806 refuted. 0 times theorem prover too weak. 367337 trivial. 0 not checked. [2021-11-23 13:47:48,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:47:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 476504 backedges. 104236 proven. 4931 refuted. 0 times theorem prover too weak. 367337 trivial. 0 not checked. [2021-11-23 13:47:52,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880074577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:47:52,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:47:52,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30, 30] total 93 [2021-11-23 13:47:52,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715457142] [2021-11-23 13:47:52,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:47:52,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-23 13:47:52,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:52,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-23 13:47:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1638, Invalid=6918, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 13:47:52,024 INFO L87 Difference]: Start difference. First operand 3135 states and 3295 transitions. Second operand has 93 states, 93 states have (on average 5.89247311827957) internal successors, (548), 93 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 13:48:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:11,227 INFO L93 Difference]: Finished difference Result 6553 states and 6935 transitions. [2021-11-23 13:48:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 360 states. [2021-11-23 13:48:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 5.89247311827957) internal successors, (548), 93 states have internal predecessors, (548), 0 states have call successors, (0), 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 2367 [2021-11-23 13:48:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:11,250 INFO L225 Difference]: With dead ends: 6553 [2021-11-23 13:48:11,251 INFO L226 Difference]: Without dead ends: 6553 [2021-11-23 13:48:11,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5124 GetRequests, 4677 SyntacticMatches, 0 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67400 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=37980, Invalid=163172, Unknown=0, NotChecked=0, Total=201152 [2021-11-23 13:48:11,259 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4528 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 3721 mSolverCounterSat, 1040 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4528 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 4761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1040 IncrementalHoareTripleChecker+Valid, 3721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:11,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4528 Valid, 368 Invalid, 4761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1040 Valid, 3721 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 13:48:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2021-11-23 13:48:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 3925. [2021-11-23 13:48:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3924 states have (on average 1.0537716615698267) internal successors, (4135), 3924 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states 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 13:48:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 4135 transitions. [2021-11-23 13:48:11,343 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 4135 transitions. Word has length 2367 [2021-11-23 13:48:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:11,344 INFO L470 AbstractCegarLoop]: Abstraction has 3925 states and 4135 transitions. [2021-11-23 13:48:11,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 5.89247311827957) internal successors, (548), 93 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 13:48:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 4135 transitions. [2021-11-23 13:48:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2553 [2021-11-23 13:48:11,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:11,402 INFO L514 BasicCegarLoop]: trace histogram [467, 466, 466, 466, 466, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-23 13:48:11,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:11,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-23 13:48:11,606 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:48:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash -646221093, now seen corresponding path program 19 times [2021-11-23 13:48:11,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:11,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569158289] [2021-11-23 13:48:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:11,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 560420 backedges. 315078 proven. 15843 refuted. 0 times theorem prover too weak. 229499 trivial. 0 not checked. [2021-11-23 13:48:14,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569158289] [2021-11-23 13:48:14,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569158289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743087030] [2021-11-23 13:48:14,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:48:14,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:14,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:14,702 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:14,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 13:48:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 6565 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 13:48:15,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 560420 backedges. 316864 proven. 14057 refuted. 0 times theorem prover too weak. 229499 trivial. 0 not checked. [2021-11-23 13:48:19,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 560420 backedges. 316864 proven. 14057 refuted. 0 times theorem prover too weak. 229499 trivial. 0 not checked. [2021-11-23 13:48:23,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743087030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:48:23,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:48:23,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 57 [2021-11-23 13:48:23,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689739394] [2021-11-23 13:48:23,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:23,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 13:48:23,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 13:48:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=2431, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 13:48:23,620 INFO L87 Difference]: Start difference. First operand 3925 states and 4135 transitions. Second operand has 57 states, 57 states have (on average 7.017543859649122) internal successors, (400), 57 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 13:48:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:27,961 INFO L93 Difference]: Finished difference Result 3925 states and 4113 transitions. [2021-11-23 13:48:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-23 13:48:27,961 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 7.017543859649122) internal successors, (400), 57 states have internal predecessors, (400), 0 states have call successors, (0), 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 2552 [2021-11-23 13:48:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:27,977 INFO L225 Difference]: With dead ends: 3925 [2021-11-23 13:48:27,977 INFO L226 Difference]: Without dead ends: 3925 [2021-11-23 13:48:27,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5310 GetRequests, 5084 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17085 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=14574, Invalid=37182, Unknown=0, NotChecked=0, Total=51756 [2021-11-23 13:48:27,981 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 177 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:27,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 473 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 13:48:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-11-23 13:48:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3925. [2021-11-23 13:48:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3924 states have (on average 1.048165137614679) internal successors, (4113), 3924 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states 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 13:48:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 4113 transitions. [2021-11-23 13:48:28,043 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 4113 transitions. Word has length 2552 [2021-11-23 13:48:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:28,044 INFO L470 AbstractCegarLoop]: Abstraction has 3925 states and 4113 transitions. [2021-11-23 13:48:28,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 7.017543859649122) internal successors, (400), 57 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 13:48:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 4113 transitions. [2021-11-23 13:48:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2613 [2021-11-23 13:48:28,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:28,108 INFO L514 BasicCegarLoop]: trace histogram [479, 478, 478, 478, 478, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-23 13:48:28,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-23 13:48:28,323 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:48:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1941804725, now seen corresponding path program 20 times [2021-11-23 13:48:28,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695863874] [2021-11-23 13:48:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:28,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 589106 backedges. 351010 proven. 18569 refuted. 0 times theorem prover too weak. 219527 trivial. 0 not checked. [2021-11-23 13:48:31,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:31,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695863874] [2021-11-23 13:48:31,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695863874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:31,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826760746] [2021-11-23 13:48:31,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:48:31,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:31,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:31,272 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:31,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 13:48:32,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:48:32,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:48:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 6709 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 13:48:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 589106 backedges. 353003 proven. 16576 refuted. 0 times theorem prover too weak. 219527 trivial. 0 not checked. [2021-11-23 13:48:36,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 589106 backedges. 353003 proven. 16576 refuted. 0 times theorem prover too weak. 219527 trivial. 0 not checked. [2021-11-23 13:48:39,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826760746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:48:39,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:48:39,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 60 [2021-11-23 13:48:39,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873142835] [2021-11-23 13:48:39,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:39,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 13:48:39,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:39,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 13:48:39,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=841, Invalid=2699, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 13:48:39,901 INFO L87 Difference]: Start difference. First operand 3925 states and 4113 transitions. Second operand has 60 states, 60 states have (on average 7.033333333333333) internal successors, (422), 60 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 13:48:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:44,950 INFO L93 Difference]: Finished difference Result 3925 states and 4092 transitions. [2021-11-23 13:48:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2021-11-23 13:48:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 7.033333333333333) internal successors, (422), 60 states have internal predecessors, (422), 0 states have call successors, (0), 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 2612 [2021-11-23 13:48:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:44,959 INFO L225 Difference]: With dead ends: 3925 [2021-11-23 13:48:44,959 INFO L226 Difference]: Without dead ends: 3925 [2021-11-23 13:48:44,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5451 GetRequests, 5203 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20860 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=17641, Invalid=44609, Unknown=0, NotChecked=0, Total=62250 [2021-11-23 13:48:44,967 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 185 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:44,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 390 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2046 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 13:48:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3925 states. [2021-11-23 13:48:45,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3925 to 3925. [2021-11-23 13:48:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3924 states have (on average 1.0428134556574924) internal successors, (4092), 3924 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states 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 13:48:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 4092 transitions. [2021-11-23 13:48:45,019 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 4092 transitions. Word has length 2612 [2021-11-23 13:48:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:45,020 INFO L470 AbstractCegarLoop]: Abstraction has 3925 states and 4092 transitions. [2021-11-23 13:48:45,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 7.033333333333333) internal successors, (422), 60 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 13:48:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 4092 transitions. [2021-11-23 13:48:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2668 [2021-11-23 13:48:45,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:45,086 INFO L514 BasicCegarLoop]: trace histogram [490, 489, 489, 489, 489, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-23 13:48:45,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-23 13:48:45,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 13:48:45,287 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:48:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1712966644, now seen corresponding path program 21 times [2021-11-23 13:48:45,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:45,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135922597] [2021-11-23 13:48:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:45,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 616034 backedges. 387376 proven. 21589 refuted. 0 times theorem prover too weak. 207069 trivial. 0 not checked. [2021-11-23 13:48:47,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:47,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135922597] [2021-11-23 13:48:47,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135922597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:47,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538724979] [2021-11-23 13:48:47,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:48:47,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:47,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:47,683 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:47,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 13:48:51,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-11-23 13:48:51,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:48:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 13:48:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 616034 backedges. 238755 proven. 34500 refuted. 0 times theorem prover too weak. 342779 trivial. 0 not checked. [2021-11-23 13:48:55,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 616034 backedges. 238630 proven. 34625 refuted. 0 times theorem prover too weak. 342779 trivial. 0 not checked. [2021-11-23 13:48:59,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538724979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:48:59,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:48:59,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 30, 30] total 99 [2021-11-23 13:48:59,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340648230] [2021-11-23 13:48:59,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:59,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-23 13:48:59,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:59,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-23 13:48:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1683, Invalid=8019, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 13:48:59,898 INFO L87 Difference]: Start difference. First operand 3925 states and 4092 transitions. Second operand has 99 states, 99 states have (on average 6.474747474747475) internal successors, (641), 99 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 13:49:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:42,884 INFO L93 Difference]: Finished difference Result 6608 states and 6948 transitions. [2021-11-23 13:49:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 568 states. [2021-11-23 13:49:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 6.474747474747475) internal successors, (641), 99 states have internal predecessors, (641), 0 states have call successors, (0), 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 2667 [2021-11-23 13:49:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:42,891 INFO L225 Difference]: With dead ends: 6608 [2021-11-23 13:49:42,891 INFO L226 Difference]: Without dead ends: 6608 [2021-11-23 13:49:42,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5938 GetRequests, 5277 SyntacticMatches, 0 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168200 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=79329, Invalid=359577, Unknown=0, NotChecked=0, Total=438906 [2021-11-23 13:49:42,912 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10094 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 5022 mSolverCounterSat, 2541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10094 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 7563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2541 IncrementalHoareTripleChecker+Valid, 5022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:42,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10094 Valid, 521 Invalid, 7563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2541 Valid, 5022 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 13:49:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-11-23 13:49:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 4623. [2021-11-23 13:49:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 1.043920380787538) internal successors, (4825), 4622 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states 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 13:49:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 4825 transitions. [2021-11-23 13:49:42,971 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 4825 transitions. Word has length 2667 [2021-11-23 13:49:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:42,973 INFO L470 AbstractCegarLoop]: Abstraction has 4623 states and 4825 transitions. [2021-11-23 13:49:42,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 6.474747474747475) internal successors, (641), 99 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 13:49:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 4825 transitions. [2021-11-23 13:49:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2823 [2021-11-23 13:49:43,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:43,042 INFO L514 BasicCegarLoop]: trace histogram [521, 520, 520, 520, 520, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-23 13:49:43,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:43,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:43,256 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:49:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash 35994475, now seen corresponding path program 22 times [2021-11-23 13:49:43,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:43,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769112873] [2021-11-23 13:49:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:43,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 695177 backedges. 448180 proven. 24918 refuted. 0 times theorem prover too weak. 222079 trivial. 0 not checked. [2021-11-23 13:49:46,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769112873] [2021-11-23 13:49:46,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769112873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197358115] [2021-11-23 13:49:46,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:49:46,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:46,558 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:46,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 13:51:21,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:51:21,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:51:21,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 7213 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 13:51:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 695177 backedges. 595709 proven. 61007 refuted. 0 times theorem prover too weak. 38461 trivial. 0 not checked. [2021-11-23 13:51:27,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 695177 backedges. 595709 proven. 61007 refuted. 0 times theorem prover too weak. 38461 trivial. 0 not checked. [2021-11-23 13:51:33,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197358115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:51:33,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:51:33,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 61, 61] total 93 [2021-11-23 13:51:33,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743678050] [2021-11-23 13:51:33,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:33,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-23 13:51:33,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-23 13:51:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1946, Invalid=6610, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 13:51:33,076 INFO L87 Difference]: Start difference. First operand 4623 states and 4825 transitions. Second operand has 93 states, 93 states have (on average 7.139784946236559) internal successors, (664), 93 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 13:51:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:50,270 INFO L93 Difference]: Finished difference Result 3185 states and 3194 transitions. [2021-11-23 13:51:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 496 states. [2021-11-23 13:51:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 7.139784946236559) internal successors, (664), 93 states have internal predecessors, (664), 0 states have call successors, (0), 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 2822 [2021-11-23 13:51:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:50,275 INFO L225 Difference]: With dead ends: 3185 [2021-11-23 13:51:50,275 INFO L226 Difference]: Without dead ends: 3185 [2021-11-23 13:51:50,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6150 GetRequests, 5594 SyntacticMatches, 0 SemanticMatches, 556 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120517 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=92279, Invalid=218527, Unknown=0, NotChecked=0, Total=310806 [2021-11-23 13:51:50,291 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 275 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 5024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:50,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 941 Invalid, 5024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 13:51:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-11-23 13:51:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 3185. [2021-11-23 13:51:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 1.0031407035175879) internal successors, (3194), 3184 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states 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 13:51:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 3194 transitions. [2021-11-23 13:51:50,323 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 3194 transitions. Word has length 2822 [2021-11-23 13:51:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:50,325 INFO L470 AbstractCegarLoop]: Abstraction has 3185 states and 3194 transitions. [2021-11-23 13:51:50,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 7.139784946236559) internal successors, (664), 93 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 13:51:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 3194 transitions. [2021-11-23 13:51:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3013 [2021-11-23 13:51:50,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:50,405 INFO L514 BasicCegarLoop]: trace histogram [559, 558, 558, 558, 558, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-23 13:51:50,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:50,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:50,628 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 13:51:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:50,629 INFO L85 PathProgramCache]: Analyzing trace with hash 654542099, now seen corresponding path program 23 times [2021-11-23 13:51:50,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:50,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2432318] [2021-11-23 13:51:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:50,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 798746 backedges. 687025 proven. 78503 refuted. 0 times theorem prover too weak. 33218 trivial. 0 not checked. [2021-11-23 13:51:55,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:55,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2432318] [2021-11-23 13:51:55,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2432318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:55,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923768651] [2021-11-23 13:51:55,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:51:55,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:55,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:55,446 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:55,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd8d020-d0d5-49bb-88e5-77f2d2b76b5b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process