./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/afnp2014.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/afnp2014.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC --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 47b2b831be7ca2da97cc2b93acc9fcef98786cfa ................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:31:04,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:31:04,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:31:04,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:31:04,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:31:04,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:31:04,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:31:04,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:31:04,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:31:04,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:31:04,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:31:04,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:31:04,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:31:04,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:31:04,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:31:04,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:31:04,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:31:04,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:31:04,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:31:04,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:31:04,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:31:04,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:31:04,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:31:04,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:31:04,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:31:04,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:31:04,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:31:04,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:31:04,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:31:04,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:31:04,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:31:04,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:31:04,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:31:04,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:31:04,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:31:04,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:31:04,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:31:04,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:31:04,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:31:04,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:31:04,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:31:04,754 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:31:04,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:31:04,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:31:04,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:31:04,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:31:04,783 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:31:04,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:31:04,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:31:04,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:31:04,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:31:04,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:31:04,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:31:04,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:31:04,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:31:04,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:31:04,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:31:04,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:31:04,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:31:04,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:31:04,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:31:04,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:31:04,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:31:04,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:31:04,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:31:04,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:31:04,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:31:04,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:31:04,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:31:04,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:31:04,791 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_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47b2b831be7ca2da97cc2b93acc9fcef98786cfa [2021-10-11 00:31:05,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:31:05,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:31:05,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:31:05,086 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:31:05,087 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:31:05,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loop-lit/afnp2014.i [2021-10-11 00:31:05,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/data/2ec9ad3aa/8ab92253b8d84d25b83a0e5ae64942aa/FLAGdf6af5763 [2021-10-11 00:31:05,752 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:31:05,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/sv-benchmarks/c/loop-lit/afnp2014.i [2021-10-11 00:31:05,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/data/2ec9ad3aa/8ab92253b8d84d25b83a0e5ae64942aa/FLAGdf6af5763 [2021-10-11 00:31:06,132 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/data/2ec9ad3aa/8ab92253b8d84d25b83a0e5ae64942aa [2021-10-11 00:31:06,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:31:06,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:31:06,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:31:06,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:31:06,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:31:06,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f318ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06, skipping insertion in model container [2021-10-11 00:31:06,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:31:06,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:31:06,409 WARN L226 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_8ce01c84-2fb1-45d4-83c6-b97435def66e/sv-benchmarks/c/loop-lit/afnp2014.i[895,908] [2021-10-11 00:31:06,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:31:06,431 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:31:06,450 WARN L226 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_8ce01c84-2fb1-45d4-83c6-b97435def66e/sv-benchmarks/c/loop-lit/afnp2014.i[895,908] [2021-10-11 00:31:06,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:31:06,475 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:31:06,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06 WrapperNode [2021-10-11 00:31:06,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:31:06,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:31:06,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:31:06,478 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:31:06,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:31:06,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:31:06,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:31:06,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:31:06,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... [2021-10-11 00:31:06,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:31:06,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:31:06,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:31:06,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:31:06,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:31:06,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:31:06,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:31:06,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:31:06,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:31:06,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:31:06,815 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 00:31:06,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:31:06 BoogieIcfgContainer [2021-10-11 00:31:06,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:31:06,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:31:06,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:31:06,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:31:06,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:31:06" (1/3) ... [2021-10-11 00:31:06,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c991d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:31:06, skipping insertion in model container [2021-10-11 00:31:06,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:06" (2/3) ... [2021-10-11 00:31:06,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c991d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:31:06, skipping insertion in model container [2021-10-11 00:31:06,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:31:06" (3/3) ... [2021-10-11 00:31:06,827 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2021-10-11 00:31:06,842 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:31:06,845 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:31:06,857 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:31:06,881 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:31:06,882 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:31:06,882 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:31:06,882 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:31:06,882 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:31:06,882 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:31:06,883 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:31:06,883 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:31:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 00:31:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:31:06,901 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:06,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:31:06,902 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-10-11 00:31:06,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:06,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368245160] [2021-10-11 00:31:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:07,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368245160] [2021-10-11 00:31:07,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:31:07,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:31:07,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941604801] [2021-10-11 00:31:07,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:31:07,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:07,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:31:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:31:07,088 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-10-11 00:31:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:07,105 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 00:31:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:31:07,106 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 00:31:07,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:07,116 INFO L225 Difference]: With dead ends: 21 [2021-10-11 00:31:07,116 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 00:31:07,119 INFO L677 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 [2021-10-11 00:31:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 00:31:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 00:31:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 00:31:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 00:31:07,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-11 00:31:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:07,157 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 00:31:07,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:31:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 00:31:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:31:07,160 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:07,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:07,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:31:07,160 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:07,165 INFO L82 PathProgramCache]: Analyzing trace with hash 177690766, now seen corresponding path program 1 times [2021-10-11 00:31:07,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:07,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474831020] [2021-10-11 00:31:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:07,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474831020] [2021-10-11 00:31:07,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:31:07,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:31:07,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635604506] [2021-10-11 00:31:07,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:31:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:07,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:31:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:31:07,382 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2021-10-11 00:31:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:07,437 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-11 00:31:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:31:07,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 00:31:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:07,439 INFO L225 Difference]: With dead ends: 16 [2021-10-11 00:31:07,439 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 00:31:07,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:31:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 00:31:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 00:31:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 00:31:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-11 00:31:07,445 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2021-10-11 00:31:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:07,446 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-11 00:31:07,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:31:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-10-11 00:31:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:31:07,447 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:07,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:07,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:31:07,448 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:07,448 INFO L82 PathProgramCache]: Analyzing trace with hash -777654537, now seen corresponding path program 1 times [2021-10-11 00:31:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:07,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289793192] [2021-10-11 00:31:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:07,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289793192] [2021-10-11 00:31:07,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035374452] [2021-10-11 00:31:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:31:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:07,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:31:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:31:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:07,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:31:07,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-11 00:31:07,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772716096] [2021-10-11 00:31:07,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:31:07,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:07,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:31:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:31:07,815 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2021-10-11 00:31:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:07,876 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-10-11 00:31:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:31:07,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2021-10-11 00:31:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:07,879 INFO L225 Difference]: With dead ends: 19 [2021-10-11 00:31:07,880 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 00:31:07,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:31:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 00:31:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 00:31:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 00:31:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-11 00:31:07,890 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-10-11 00:31:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:07,891 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-11 00:31:07,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:31:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-10-11 00:31:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 00:31:07,892 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:07,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:08,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 00:31:08,125 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1278694382, now seen corresponding path program 2 times [2021-10-11 00:31:08,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:08,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516400455] [2021-10-11 00:31:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:08,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516400455] [2021-10-11 00:31:08,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645203658] [2021-10-11 00:31:08,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:31:08,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:31:08,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:31:08,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:31:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:31:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:08,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:31:08,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 00:31:08,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120415648] [2021-10-11 00:31:08,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:31:08,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:31:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:31:08,462 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 8 states. [2021-10-11 00:31:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:08,535 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-10-11 00:31:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:31:08,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-10-11 00:31:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:08,536 INFO L225 Difference]: With dead ends: 15 [2021-10-11 00:31:08,536 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 00:31:08,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:31:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 00:31:08,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 00:31:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 00:31:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:31:08,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-11 00:31:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:08,538 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:31:08,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:31:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:31:08,539 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 00:31:08,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:31:08,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 00:31:08,826 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 00:31:08,827 INFO L262 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-10-11 00:31:08,827 INFO L262 CegarLoopResult]: For program point L27-3(lines 27 30) no Hoare annotation was computed. [2021-10-11 00:31:08,827 INFO L258 CegarLoopResult]: At program point L27-5(lines 27 30) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= 1 ULTIMATE.start_main_~x~0)) [2021-10-11 00:31:08,827 INFO L262 CegarLoopResult]: For program point L27-6(lines 27 30) no Hoare annotation was computed. [2021-10-11 00:31:08,827 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-11 00:31:08,827 INFO L265 CegarLoopResult]: At program point L32(lines 24 33) the Hoare annotation is: true [2021-10-11 00:31:08,827 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-11 00:31:08,828 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 00:31:08,828 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-11 00:31:08,828 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-11 00:31:08,828 INFO L262 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-11 00:31:08,828 INFO L265 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-11 00:31:08,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:31:08 BoogieIcfgContainer [2021-10-11 00:31:08,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:31:08,856 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:31:08,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:31:08,857 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:31:08,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:31:06" (3/4) ... [2021-10-11 00:31:08,860 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 00:31:08,881 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-11 00:31:08,881 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 00:31:08,881 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:31:08,881 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:31:08,916 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce01c84-2fb1-45d4-83c6-b97435def66e/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:31:08,916 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:31:08,918 INFO L168 Benchmark]: Toolchain (without parser) took 2778.55 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 65.0 MB in the beginning and 113.4 MB in the end (delta: -48.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:31:08,918 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory was 69.5 MB in the beginning and 69.5 MB in the end (delta: 28.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:31:08,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.52 ms. Allocated memory is still 98.6 MB. Free memory was 64.8 MB in the beginning and 74.8 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:08,920 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.73 ms. Allocated memory is still 98.6 MB. Free memory was 74.8 MB in the beginning and 73.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:08,920 INFO L168 Benchmark]: Boogie Preprocessor took 17.93 ms. Allocated memory is still 98.6 MB. Free memory was 73.5 MB in the beginning and 72.7 MB in the end (delta: 820.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:31:08,921 INFO L168 Benchmark]: RCFGBuilder took 282.82 ms. Allocated memory is still 98.6 MB. Free memory was 72.2 MB in the beginning and 61.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:08,922 INFO L168 Benchmark]: TraceAbstraction took 2037.58 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 61.3 MB in the beginning and 116.4 MB in the end (delta: -55.1 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:08,922 INFO L168 Benchmark]: Witness Printer took 59.57 ms. Allocated memory is still 140.5 MB. Free memory was 116.4 MB in the beginning and 113.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:08,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory was 69.5 MB in the beginning and 69.5 MB in the end (delta: 28.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 334.52 ms. Allocated memory is still 98.6 MB. Free memory was 64.8 MB in the beginning and 74.8 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.73 ms. Allocated memory is still 98.6 MB. Free memory was 74.8 MB in the beginning and 73.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.93 ms. Allocated memory is still 98.6 MB. Free memory was 73.5 MB in the beginning and 72.7 MB in the end (delta: 820.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 282.82 ms. Allocated memory is still 98.6 MB. Free memory was 72.2 MB in the beginning and 61.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2037.58 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 61.3 MB in the beginning and 116.4 MB in the end (delta: -55.1 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. * Witness Printer took 59.57 ms. Allocated memory is still 140.5 MB. Free memory was 116.4 MB in the beginning and 113.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (0 <= y && y <= x) && 1 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 19 SDslu, 40 SDs, 0 SdLazy, 31 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 12 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1916 SizeOfPredicates, 6 NumberOfNonLiveVariables, 114 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...