./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square_int.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square_int.c -s /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer --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 ba8acdf434ba605da81b4b94488025a77c80baa5 ........................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square_int.c -s /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer --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 ba8acdf434ba605da81b4b94488025a77c80baa5 ................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:10:20,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:10:20,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:10:20,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:10:20,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:10:20,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:10:20,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:10:20,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:10:20,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:10:20,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:10:20,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:10:20,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:10:20,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:10:20,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:10:20,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:10:20,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:10:20,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:10:20,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:10:20,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:10:20,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:10:20,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:10:20,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:10:20,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:10:20,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:10:20,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:10:20,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:10:20,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:10:20,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:10:20,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:10:20,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:10:20,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:10:20,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:10:20,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:10:20,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:10:20,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:10:20,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:10:20,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:10:20,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:10:20,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:10:20,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:10:20,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:10:20,627 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:10:20,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:10:20,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:10:20,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:10:20,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:10:20,672 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:10:20,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:10:20,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:10:20,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:10:20,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:10:20,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:10:20,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:10:20,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:10:20,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:10:20,674 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:10:20,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:10:20,675 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:10:20,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:10:20,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:10:20,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:10:20,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:10:20,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:10:20,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:10:20,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:10:20,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:10:20,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:10:20,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:10:20,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:10:20,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:10:20,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:10:20,679 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-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-11-30 01:10:20,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:10:20,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:10:21,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:10:21,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:10:21,010 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:10:21,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/../../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-11-30 01:10:21,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data/6339ff52a/d27e3fbf17474b348bc8cfdfa8124e61/FLAGf190db73d [2020-11-30 01:10:21,490 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.cdt.parser.UltimateCdtExternalSettingsProvider$ToolchainDependency.access$0(UltimateCdtExternalSettingsProvider.java:86) at de.uni_freiburg.informatik.ultimate.cdt.parser.UltimateCdtExternalSettingsProvider.getSettings(UltimateCdtExternalSettingsProvider.java:67) at org.eclipse.cdt.core.settings.model.extension.CExternalSettingProvider.getSettings(CExternalSettingProvider.java:48) at org.eclipse.cdt.internal.core.settings.model.ExtensionContainerFactory$CExtensionSettingProviderDescriptor.getContainer(ExtensionContainerFactory.java:110) at org.eclipse.cdt.internal.core.settings.model.ExtensionContainerFactory.createContainer(ExtensionContainerFactory.java:186) at org.eclipse.cdt.internal.core.settings.model.CExternalSettingsManager$ContainerDescriptor.(CExternalSettingsManager.java:147) at org.eclipse.cdt.internal.core.settings.model.CExternalSettingsManager.checkExternalSettingsChange(CExternalSettingsManager.java:683) at org.eclipse.cdt.internal.core.settings.model.CExternalSettingsManager.processContainerChange(CExternalSettingsManager.java:501) at org.eclipse.cdt.internal.core.settings.model.CExternalSettingsManager$2.run(CExternalSettingsManager.java:615) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager$5.run(CProjectDescriptionManager.java:508) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2292) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.runAtomic(CProjectDescriptionManager.java:504) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager$4.run(CProjectDescriptionManager.java:484) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:10:21,678 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:10:21,679 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-11-30 01:10:21,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data/6339ff52a/d27e3fbf17474b348bc8cfdfa8124e61/FLAGf190db73d [2020-11-30 01:10:22,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data/6339ff52a/d27e3fbf17474b348bc8cfdfa8124e61 [2020-11-30 01:10:22,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:10:22,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:10:22,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:22,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:10:22,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:10:22,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b91ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22, skipping insertion in model container [2020-11-30 01:10:22,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:10:22,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:10:22,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:22,345 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:10:22,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:22,390 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:10:22,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22 WrapperNode [2020-11-30 01:10:22,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:22,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:22,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:10:22,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:10:22,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:22,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:10:22,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:10:22,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:10:22,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... [2020-11-30 01:10:22,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:10:22,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:10:22,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:10:22,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:10:22,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/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 [2020-11-30 01:10:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:10:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:10:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:10:22,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:10:22,822 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:10:22,822 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 01:10:22,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:22 BoogieIcfgContainer [2020-11-30 01:10:22,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:10:22,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:10:22,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:10:22,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:10:22,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:10:22" (1/3) ... [2020-11-30 01:10:22,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58584f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:22, skipping insertion in model container [2020-11-30 01:10:22,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:22" (2/3) ... [2020-11-30 01:10:22,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58584f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:22, skipping insertion in model container [2020-11-30 01:10:22,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:22" (3/3) ... [2020-11-30 01:10:22,833 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-11-30 01:10:22,844 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:10:22,848 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:10:22,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:10:22,885 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:10:22,885 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:10:22,886 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:10:22,886 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:10:22,886 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:10:22,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:10:22,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:10:22,887 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:10:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-30 01:10:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:10:22,907 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:22,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:10:22,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:22,915 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-11-30 01:10:22,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:22,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607673157] [2020-11-30 01:10:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:23,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607673157] [2020-11-30 01:10:23,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:23,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:10:23,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067900828] [2020-11-30 01:10:23,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:10:23,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:23,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:10:23,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:10:23,145 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-30 01:10:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:23,160 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-30 01:10:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:10:23,161 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-30 01:10:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:23,170 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:10:23,170 INFO L226 Difference]: Without dead ends: 7 [2020-11-30 01:10:23,173 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 [2020-11-30 01:10:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-30 01:10:23,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-30 01:10:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 01:10:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-30 01:10:23,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-30 01:10:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:23,210 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-30 01:10:23,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:10:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-30 01:10:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:10:23,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:23,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:10:23,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:10:23,212 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-11-30 01:10:23,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:23,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423427881] [2020-11-30 01:10:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:10:23,258 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:10:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:10:23,289 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:10:23,312 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:10:23,312 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:10:23,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:10:23,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:10:23 BoogieIcfgContainer [2020-11-30 01:10:23,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:10:23,334 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:10:23,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:10:23,335 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:10:23,335 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:22" (3/4) ... [2020-11-30 01:10:23,339 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:10:23,340 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:10:23,342 INFO L168 Benchmark]: Toolchain (without parser) took 1258.90 ms. Allocated memory is still 94.4 MB. Free memory was 60.3 MB in the beginning and 37.8 MB in the end (delta: 22.6 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:23,343 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 94.4 MB. Free memory was 64.8 MB in the beginning and 64.8 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:10:23,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.57 ms. Allocated memory is still 94.4 MB. Free memory was 60.1 MB in the beginning and 71.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:23,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.36 ms. Allocated memory is still 94.4 MB. Free memory was 71.8 MB in the beginning and 70.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:23,346 INFO L168 Benchmark]: Boogie Preprocessor took 43.40 ms. Allocated memory is still 94.4 MB. Free memory was 70.2 MB in the beginning and 69.2 MB in the end (delta: 981.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:10:23,347 INFO L168 Benchmark]: RCFGBuilder took 324.40 ms. Allocated memory is still 94.4 MB. Free memory was 69.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:23,348 INFO L168 Benchmark]: TraceAbstraction took 507.76 ms. Allocated memory is still 94.4 MB. Free memory was 58.3 MB in the beginning and 38.3 MB in the end (delta: 20.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:23,349 INFO L168 Benchmark]: Witness Printer took 5.42 ms. Allocated memory is still 94.4 MB. Free memory was 38.3 MB in the beginning and 37.8 MB in the end (delta: 492.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:10:23,353 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 94.4 MB. Free memory was 64.8 MB in the beginning and 64.8 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.57 ms. Allocated memory is still 94.4 MB. Free memory was 60.1 MB in the beginning and 71.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.36 ms. Allocated memory is still 94.4 MB. Free memory was 71.8 MB in the beginning and 70.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.40 ms. Allocated memory is still 94.4 MB. Free memory was 70.2 MB in the beginning and 69.2 MB in the end (delta: 981.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 324.40 ms. Allocated memory is still 94.4 MB. Free memory was 69.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 507.76 ms. Allocated memory is still 94.4 MB. Free memory was 58.3 MB in the beginning and 38.3 MB in the end (delta: 20.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.42 ms. Allocated memory is still 94.4 MB. Free memory was 38.3 MB in the beginning and 37.8 MB in the end (delta: 492.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L23] y = x*x - 2.f [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square_int.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:10:26,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:10:26,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:10:26,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:10:26,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:10:26,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:10:26,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:10:26,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:10:26,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:10:26,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:10:26,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:10:26,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:10:26,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:10:26,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:10:26,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:10:26,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:10:26,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:10:26,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:10:26,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:10:26,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:10:26,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:10:26,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:10:26,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:10:26,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:10:26,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:10:26,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:10:26,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:10:26,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:10:26,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:10:26,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:10:26,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:10:26,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:10:26,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:10:26,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:10:26,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:10:26,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:10:26,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:10:26,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:10:26,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:10:26,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:10:26,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:10:26,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-30 01:10:26,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:10:26,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:10:26,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:10:26,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:10:26,476 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:10:26,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:10:26,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:10:26,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:10:26,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:10:26,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:10:26,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:10:26,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:10:26,480 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 01:10:26,481 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 01:10:26,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:10:26,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:10:26,481 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:10:26,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:10:26,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:10:26,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:10:26,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:10:26,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:10:26,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:10:26,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:10:26,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:10:26,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:10:26,484 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-30 01:10:26,485 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 01:10:26,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:10:26,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:10:26,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:10:26,505 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-11-30 01:10:27,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:10:27,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:10:27,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:10:27,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:10:27,074 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:10:27,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/../../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-11-30 01:10:27,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data/8f5f1943d/6e44969a703b494a9549701412003954/FLAG523848833 [2020-11-30 01:10:27,647 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:10:27,648 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-11-30 01:10:27,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data/8f5f1943d/6e44969a703b494a9549701412003954/FLAG523848833 [2020-11-30 01:10:28,014 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/data/8f5f1943d/6e44969a703b494a9549701412003954 [2020-11-30 01:10:28,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:10:28,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:10:28,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:28,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:10:28,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:10:28,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ec5496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28, skipping insertion in model container [2020-11-30 01:10:28,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:10:28,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:10:28,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:28,313 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:10:28,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:28,373 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:10:28,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28 WrapperNode [2020-11-30 01:10:28,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:28,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:28,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:10:28,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:10:28,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:28,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:10:28,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:10:28,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:10:28,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... [2020-11-30 01:10:28,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:10:28,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:10:28,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:10:28,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:10:28,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/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 [2020-11-30 01:10:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 01:10:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:10:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:10:28,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:10:30,680 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:10:30,681 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 01:10:30,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:30 BoogieIcfgContainer [2020-11-30 01:10:30,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:10:30,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:10:30,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:10:30,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:10:30,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:10:28" (1/3) ... [2020-11-30 01:10:30,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f56e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:30, skipping insertion in model container [2020-11-30 01:10:30,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:28" (2/3) ... [2020-11-30 01:10:30,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f56e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:30, skipping insertion in model container [2020-11-30 01:10:30,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:30" (3/3) ... [2020-11-30 01:10:30,692 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-11-30 01:10:30,704 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:10:30,709 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:10:30,722 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:10:30,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:10:30,748 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:10:30,748 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:10:30,748 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:10:30,748 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:10:30,748 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:10:30,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:10:30,749 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:10:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-30 01:10:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:10:30,769 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:30,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:10:30,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-11-30 01:10:30,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-30 01:10:30,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230428346] [2020-11-30 01:10:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 01:10:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 01:10:31,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:31,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:10:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:31,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230428346] [2020-11-30 01:10:31,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:31,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:10:31,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028563951] [2020-11-30 01:10:31,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:10:31,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-30 01:10:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:10:31,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:10:31,151 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-30 01:10:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:31,170 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-30 01:10:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:10:31,171 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-30 01:10:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:31,183 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:10:31,183 INFO L226 Difference]: Without dead ends: 7 [2020-11-30 01:10:31,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:10:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-30 01:10:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-30 01:10:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 01:10:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-30 01:10:31,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-30 01:10:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:31,228 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-30 01:10:31,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:10:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-30 01:10:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:10:31,229 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:31,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:10:31,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 01:10:31,445 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-11-30 01:10:31,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-30 01:10:31,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378671573] [2020-11-30 01:10:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 01:10:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:31,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:10:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:33,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:10:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:36,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378671573] [2020-11-30 01:10:36,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:36,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 01:10:36,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321054720] [2020-11-30 01:10:36,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:10:36,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-30 01:10:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:10:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:10:36,919 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 5 states. [2020-11-30 01:10:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:37,337 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-11-30 01:10:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:10:37,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-30 01:10:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:37,338 INFO L225 Difference]: With dead ends: 7 [2020-11-30 01:10:37,338 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:10:37,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:10:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:10:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:10:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:10:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:10:37,340 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-11-30 01:10:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:37,341 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:10:37,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:10:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:10:37,341 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:10:37,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 01:10:37,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:10:37,607 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:10:37,608 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-11-30 01:10:37,608 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-30 01:10:37,608 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-30 01:10:37,608 INFO L277 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-11-30 01:10:37,608 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-30 01:10:37,608 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 01:10:37,609 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:10:37,609 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 01:10:37,609 INFO L277 CegarLoopResult]: At program point L26(lines 15 27) the Hoare annotation is: true [2020-11-30 01:10:37,609 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-30 01:10:37,609 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-30 01:10:37,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:10:37 BoogieIcfgContainer [2020-11-30 01:10:37,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:10:37,624 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:10:37,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:10:37,625 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:10:37,626 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:30" (3/4) ... [2020-11-30 01:10:37,629 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:10:37,642 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 01:10:37,651 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:10:37,652 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 01:10:37,653 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:10:37,706 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_703d58da-be50-4acf-8a90-60f2e45da3d6/bin/uautomizer/witness.graphml [2020-11-30 01:10:37,707 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:10:37,709 INFO L168 Benchmark]: Toolchain (without parser) took 9687.44 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 43.9 MB in the beginning and 38.0 MB in the end (delta: 5.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:37,710 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 62.9 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:10:37,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.17 ms. Allocated memory is still 62.9 MB. Free memory was 43.8 MB in the beginning and 33.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:37,711 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.83 ms. Allocated memory is still 62.9 MB. Free memory was 33.9 MB in the beginning and 46.2 MB in the end (delta: -12.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:37,712 INFO L168 Benchmark]: Boogie Preprocessor took 51.69 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 45.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:10:37,713 INFO L168 Benchmark]: RCFGBuilder took 2136.30 ms. Allocated memory is still 62.9 MB. Free memory was 45.0 MB in the beginning and 33.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:37,714 INFO L168 Benchmark]: TraceAbstraction took 6937.36 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 33.5 MB in the beginning and 40.5 MB in the end (delta: -7.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:37,714 INFO L168 Benchmark]: Witness Printer took 83.13 ms. Allocated memory is still 81.8 MB. Free memory was 40.5 MB in the beginning and 38.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:37,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 62.9 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.17 ms. Allocated memory is still 62.9 MB. Free memory was 43.8 MB in the beginning and 33.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.83 ms. Allocated memory is still 62.9 MB. Free memory was 33.9 MB in the beginning and 46.2 MB in the end (delta: -12.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.69 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 45.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2136.30 ms. Allocated memory is still 62.9 MB. Free memory was 45.0 MB in the beginning and 33.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6937.36 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 33.5 MB in the beginning and 40.5 MB in the end (delta: -7.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * Witness Printer took 83.13 ms. Allocated memory is still 81.8 MB. Free memory was 40.5 MB in the beginning and 38.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 165 SizeOfPredicates, 6 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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...