./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array10_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array10_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0942a0394519a722254bfe5a1820a904a71ba1b47e3e66c2c8dc2abe6585692f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:18:35,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:18:35,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:18:35,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:18:35,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:18:35,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:18:35,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:18:35,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:18:35,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:18:35,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:18:35,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:18:35,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:18:35,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:18:35,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:18:35,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:18:35,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:18:35,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:18:35,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:18:35,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:18:35,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:18:35,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:18:35,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:18:35,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:18:35,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:18:35,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:18:35,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:18:35,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:18:35,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:18:35,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:18:35,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:18:35,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:18:35,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:18:35,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:18:35,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:18:35,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:18:35,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:18:35,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:18:35,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:18:35,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:18:35,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:18:35,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:18:35,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:18:35,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:18:35,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:18:35,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:18:35,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:18:35,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:18:35,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:18:35,782 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:18:35,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:18:35,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:18:35,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:18:35,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:18:35,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:18:35,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:18:35,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:18:35,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:18:35,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:18:35,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:18:35,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:18:35,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:18:35,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:18:35,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:18:35,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:18:35,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:35,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:18:35,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:18:35,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:18:35,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:18:35,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:18:35,785 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:18:35,785 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:18:35,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:18:35,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:18:35,785 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_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0942a0394519a722254bfe5a1820a904a71ba1b47e3e66c2c8dc2abe6585692f [2021-11-09 09:18:36,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:18:36,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:18:36,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:18:36,131 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:18:36,132 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:18:36,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-patterns/array10_pattern.c [2021-11-09 09:18:36,220 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/data/0ace17465/2c3b67042e47460f99f1d9e2e1511866/FLAG97f824fc0 [2021-11-09 09:18:36,697 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:18:36,698 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/sv-benchmarks/c/array-patterns/array10_pattern.c [2021-11-09 09:18:36,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/data/0ace17465/2c3b67042e47460f99f1d9e2e1511866/FLAG97f824fc0 [2021-11-09 09:18:37,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/data/0ace17465/2c3b67042e47460f99f1d9e2e1511866 [2021-11-09 09:18:37,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:18:37,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:18:37,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:37,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:18:37,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:18:37,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1706a18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37, skipping insertion in model container [2021-11-09 09:18:37,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:18:37,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:18:37,278 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/sv-benchmarks/c/array-patterns/array10_pattern.c[1326,1339] [2021-11-09 09:18:37,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:37,305 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:18:37,316 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/sv-benchmarks/c/array-patterns/array10_pattern.c[1326,1339] [2021-11-09 09:18:37,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:37,340 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:18:37,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37 WrapperNode [2021-11-09 09:18:37,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:37,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:18:37,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:18:37,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:18:37,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:18:37,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:18:37,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:18:37,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:18:37,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:18:37,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:18:37,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:18:37,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:18:37,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (1/1) ... [2021-11-09 09:18:37,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:37,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:37,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:18:37,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:18:37,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:18:37,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:18:37,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:18:37,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:18:37,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:18:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:18:37,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:18:37,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:18:37,863 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 09:18:37,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:37 BoogieIcfgContainer [2021-11-09 09:18:37,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:18:37,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:18:37,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:18:37,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:18:37,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:18:37" (1/3) ... [2021-11-09 09:18:37,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2025687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:37, skipping insertion in model container [2021-11-09 09:18:37,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:37" (2/3) ... [2021-11-09 09:18:37,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2025687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:37, skipping insertion in model container [2021-11-09 09:18:37,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:37" (3/3) ... [2021-11-09 09:18:37,875 INFO L111 eAbstractionObserver]: Analyzing ICFG array10_pattern.c [2021-11-09 09:18:37,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:18:37,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:18:37,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:18:37,937 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-09 09:18:37,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:18:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:18:37,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:37,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:37,960 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:37,966 INFO L85 PathProgramCache]: Analyzing trace with hash 762886292, now seen corresponding path program 1 times [2021-11-09 09:18:37,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:37,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803673060] [2021-11-09 09:18:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:37,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:38,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:38,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803673060] [2021-11-09 09:18:38,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803673060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:38,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:38,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:18:38,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707201070] [2021-11-09 09:18:38,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:18:38,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:18:38,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:18:38,234 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:38,249 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-11-09 09:18:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:18:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 09:18:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:38,259 INFO L225 Difference]: With dead ends: 43 [2021-11-09 09:18:38,259 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 09:18:38,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:18:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 09:18:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 09:18:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-09 09:18:38,294 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-11-09 09:18:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:38,294 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-09 09:18:38,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-09 09:18:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:18:38,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:38,296 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:38,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:18:38,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash -198426358, now seen corresponding path program 1 times [2021-11-09 09:18:38,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:38,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004614218] [2021-11-09 09:18:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:38,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:38,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:18:38,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615547933] [2021-11-09 09:18:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:38,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:38,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:38,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:38,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:18:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:38,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:18:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:38,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:38,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004614218] [2021-11-09 09:18:38,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:18:38,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615547933] [2021-11-09 09:18:38,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615547933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:38,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:38,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:18:38,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541032358] [2021-11-09 09:18:38,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:18:38,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:38,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:18:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:38,662 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:38,802 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-11-09 09:18:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 09:18:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:38,804 INFO L225 Difference]: With dead ends: 37 [2021-11-09 09:18:38,804 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 09:18:38,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 09:18:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-11-09 09:18:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-11-09 09:18:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-09 09:18:38,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2021-11-09 09:18:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:38,811 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-09 09:18:38,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-09 09:18:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:18:38,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:38,812 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:38,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:39,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:39,013 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:39,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:39,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1584847118, now seen corresponding path program 1 times [2021-11-09 09:18:39,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:39,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114555339] [2021-11-09 09:18:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:39,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:39,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:18:39,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689638215] [2021-11-09 09:18:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:39,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:39,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:39,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:39,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:18:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:18:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:39,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:39,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114555339] [2021-11-09 09:18:39,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:18:39,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689638215] [2021-11-09 09:18:39,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689638215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:39,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:18:39,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 09:18:39,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141515016] [2021-11-09 09:18:39,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:18:39,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:18:39,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:39,512 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-11-09 09:18:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:39,824 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-11-09 09:18:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:18:39,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 20 [2021-11-09 09:18:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:39,826 INFO L225 Difference]: With dead ends: 66 [2021-11-09 09:18:39,826 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 09:18:39,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:18:39,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 09:18:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2021-11-09 09:18:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-09 09:18:39,834 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 20 [2021-11-09 09:18:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:39,835 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-09 09:18:39,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-11-09 09:18:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-09 09:18:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:18:39,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:39,836 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:39,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 09:18:40,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:40,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1191820108, now seen corresponding path program 1 times [2021-11-09 09:18:40,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:40,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743299553] [2021-11-09 09:18:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:40,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:40,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:18:40,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487103545] [2021-11-09 09:18:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:40,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:40,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:40,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:40,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d802f83e-45d0-4368-8b34-359a3dda8e74/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:18:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:18:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:40,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:18:40,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-09 09:18:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:18:40,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:18:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:18:40,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 86 [2021-11-09 09:18:40,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:18:40,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:18:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 21 [2021-11-09 09:18:41,335 INFO L354 Elim1Store]: treesize reduction 275, result has 8.0 percent of original size [2021-11-09 09:18:41,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 220 treesize of output 211 [2021-11-09 09:18:41,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-11-09 09:18:41,589 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-11-09 09:18:41,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 94 [2021-11-09 09:18:41,606 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-09 09:18:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 54