./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02.i --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_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/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 67768b34e7b9299b4c0862a201d7fe793c7261b3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:58:15,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:15,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:15,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:15,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:15,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:15,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:15,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:15,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:15,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:15,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:15,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:15,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:15,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:15,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:15,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:15,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:15,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:15,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:15,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:15,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:15,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:15,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:15,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:15,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:15,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:15,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:15,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:15,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:15,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:15,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:15,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:15,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:15,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:15,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:15,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:15,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:15,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:15,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:15,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:15,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:15,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:58:15,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:15,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:15,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:15,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:15,840 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:15,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:15,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:58:15,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:15,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:58:15,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:15,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:58:15,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:58:15,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:58:15,844 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:58:15,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:15,845 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:15,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:58:15,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:15,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:15,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:58:15,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:58:15,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:15,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:15,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:58:15,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:58:15,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:15,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:58:15,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:58:15,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:15,849 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_92747a58-2dab-4e48-a639-fbce28fd69dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67768b34e7b9299b4c0862a201d7fe793c7261b3 [2020-11-28 02:58:16,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:16,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:16,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:16,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:16,250 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:16,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/../../sv-benchmarks/c/loops/sum01_bug02.i [2020-11-28 02:58:16,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/data/11f036f3b/5349fb63e6ff45818a88f27040018a2f/FLAG6c1430152 [2020-11-28 02:58:16,976 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:16,976 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/sv-benchmarks/c/loops/sum01_bug02.i [2020-11-28 02:58:16,983 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/data/11f036f3b/5349fb63e6ff45818a88f27040018a2f/FLAG6c1430152 [2020-11-28 02:58:17,325 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/data/11f036f3b/5349fb63e6ff45818a88f27040018a2f [2020-11-28 02:58:17,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:17,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:17,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:17,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:17,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:17,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f63684c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17, skipping insertion in model container [2020-11-28 02:58:17,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:17,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:17,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:17,614 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:17,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:17,669 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:17,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17 WrapperNode [2020-11-28 02:58:17,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:17,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:17,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:17,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:17,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:17,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:17,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:17,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:17,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... [2020-11-28 02:58:17,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:17,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:17,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:17,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:17,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/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 [2020-11-28 02:58:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:58:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:17,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:18,164 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:18,164 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 02:58:18,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:18 BoogieIcfgContainer [2020-11-28 02:58:18,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:18,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:58:18,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:58:18,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:58:18,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:58:17" (1/3) ... [2020-11-28 02:58:18,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb15dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:18, skipping insertion in model container [2020-11-28 02:58:18,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:17" (2/3) ... [2020-11-28 02:58:18,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb15dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:18, skipping insertion in model container [2020-11-28 02:58:18,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:18" (3/3) ... [2020-11-28 02:58:18,198 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-11-28 02:58:18,232 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:58:18,236 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:58:18,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:58:18,329 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:58:18,330 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:58:18,330 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:58:18,330 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:18,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:18,331 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:58:18,331 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:18,331 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:58:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-28 02:58:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:58:18,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:18,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:18,362 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:18,384 INFO L82 PathProgramCache]: Analyzing trace with hash 590808584, now seen corresponding path program 1 times [2020-11-28 02:58:18,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:18,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923734423] [2020-11-28 02:58:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:18,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923734423] [2020-11-28 02:58:18,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:18,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:58:18,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826829826] [2020-11-28 02:58:18,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:58:18,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:58:18,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:58:18,669 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-11-28 02:58:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:18,698 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-11-28 02:58:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:58:18,699 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-28 02:58:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:18,706 INFO L225 Difference]: With dead ends: 25 [2020-11-28 02:58:18,707 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 02:58:18,710 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 [2020-11-28 02:58:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 02:58:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 02:58:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 02:58:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-28 02:58:18,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-11-28 02:58:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:18,751 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-28 02:58:18,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:58:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-28 02:58:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:58:18,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:18,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:18,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:58:18,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash 218629621, now seen corresponding path program 1 times [2020-11-28 02:58:18,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:18,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750159023] [2020-11-28 02:58:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:18,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750159023] [2020-11-28 02:58:18,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:18,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:18,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982582975] [2020-11-28 02:58:18,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:58:18,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:58:18,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:58:18,847 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-11-28 02:58:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:18,928 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-11-28 02:58:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:58:18,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 02:58:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:18,930 INFO L225 Difference]: With dead ends: 22 [2020-11-28 02:58:18,930 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 02:58:18,931 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 [2020-11-28 02:58:18,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 02:58:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 02:58:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 02:58:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-28 02:58:18,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-11-28 02:58:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:18,936 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-28 02:58:18,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:58:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-28 02:58:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:58:18,937 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:18,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:18,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:58:18,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:18,939 INFO L82 PathProgramCache]: Analyzing trace with hash 212204378, now seen corresponding path program 1 times [2020-11-28 02:58:18,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:18,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592480480] [2020-11-28 02:58:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:19,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592480480] [2020-11-28 02:58:19,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382140719] [2020-11-28 02:58:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/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 [2020-11-28 02:58:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 02:58:19,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:19,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:19,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 02:58:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:19,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:19,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-11-28 02:58:19,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997359713] [2020-11-28 02:58:19,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 02:58:19,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 02:58:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:19,628 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 12 states. [2020-11-28 02:58:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:19,810 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-28 02:58:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:19,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-11-28 02:58:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:19,813 INFO L225 Difference]: With dead ends: 32 [2020-11-28 02:58:19,814 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 02:58:19,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:58:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 02:58:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-11-28 02:58:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 02:58:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-28 02:58:19,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2020-11-28 02:58:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:19,824 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-28 02:58:19,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 02:58:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-28 02:58:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 02:58:19,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:19,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:20,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 02:58:20,042 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 2010166847, now seen corresponding path program 2 times [2020-11-28 02:58:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:20,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362397750] [2020-11-28 02:58:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:20,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362397750] [2020-11-28 02:58:20,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668487980] [2020-11-28 02:58:20,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/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 [2020-11-28 02:58:20,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:20,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 02:58:20,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:20,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 02:58:20,709 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-28 02:58:20,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 02:58:20,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:20,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 02:58:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:20,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:20,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-28 02:58:20,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74731421] [2020-11-28 02:58:20,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 02:58:20,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:20,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 02:58:20,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-11-28 02:58:20,758 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 16 states. [2020-11-28 02:58:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:21,355 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-11-28 02:58:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 02:58:21,356 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-11-28 02:58:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:21,358 INFO L225 Difference]: With dead ends: 46 [2020-11-28 02:58:21,358 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 02:58:21,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-11-28 02:58:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 02:58:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-11-28 02:58:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 02:58:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-11-28 02:58:21,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-11-28 02:58:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:21,368 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-11-28 02:58:21,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 02:58:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-11-28 02:58:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 02:58:21,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:21,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:21,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:21,586 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:21,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1604742079, now seen corresponding path program 1 times [2020-11-28 02:58:21,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:21,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992082790] [2020-11-28 02:58:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:21,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992082790] [2020-11-28 02:58:21,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653720223] [2020-11-28 02:58:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:58:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:21,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:21,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-28 02:58:21,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831175052] [2020-11-28 02:58:21,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:58:21,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:58:21,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:21,823 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2020-11-28 02:58:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:21,883 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-11-28 02:58:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:58:21,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-28 02:58:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:21,885 INFO L225 Difference]: With dead ends: 39 [2020-11-28 02:58:21,885 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 02:58:21,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 02:58:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-28 02:58:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 02:58:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-28 02:58:21,897 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-11-28 02:58:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:21,897 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-28 02:58:21,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:58:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-28 02:58:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:58:21,903 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:21,903 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:22,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:22,104 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1338878810, now seen corresponding path program 2 times [2020-11-28 02:58:22,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:22,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068445868] [2020-11-28 02:58:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:22,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068445868] [2020-11-28 02:58:22,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616708680] [2020-11-28 02:58:22,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:22,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:22,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:22,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:22,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:22,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-11-28 02:58:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094272807] [2020-11-28 02:58:22,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 02:58:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 02:58:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:22,462 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 12 states. [2020-11-28 02:58:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:22,567 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-11-28 02:58:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:22,571 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-11-28 02:58:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:22,571 INFO L225 Difference]: With dead ends: 35 [2020-11-28 02:58:22,572 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 02:58:22,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 02:58:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-28 02:58:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 02:58:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-28 02:58:22,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-11-28 02:58:22,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:22,583 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-28 02:58:22,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 02:58:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-28 02:58:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 02:58:22,585 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:22,585 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:22,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:22,786 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:22,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2102297463, now seen corresponding path program 3 times [2020-11-28 02:58:22,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:22,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215744364] [2020-11-28 02:58:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 02:58:23,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215744364] [2020-11-28 02:58:23,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828877335] [2020-11-28 02:58:23,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:23,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 02:58:23,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 02:58:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:23,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 02:58:23,557 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-28 02:58:23,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 02:58:23,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:23,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 02:58:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:23,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:23,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2020-11-28 02:58:23,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323381057] [2020-11-28 02:58:23,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-28 02:58:23,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-28 02:58:23,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-11-28 02:58:23,619 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 21 states. [2020-11-28 02:58:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:24,592 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-11-28 02:58:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-28 02:58:24,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-28 02:58:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:24,594 INFO L225 Difference]: With dead ends: 48 [2020-11-28 02:58:24,594 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 02:58:24,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-11-28 02:58:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 02:58:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-11-28 02:58:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 02:58:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-28 02:58:24,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2020-11-28 02:58:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:24,605 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-28 02:58:24,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-28 02:58:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-28 02:58:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 02:58:24,606 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:24,606 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:24,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 02:58:24,807 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:24,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:24,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1422239093, now seen corresponding path program 3 times [2020-11-28 02:58:24,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:24,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901006075] [2020-11-28 02:58:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901006075] [2020-11-28 02:58:24,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341023397] [2020-11-28 02:58:24,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:24,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 02:58:24,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 02:58:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:25,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:25,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-11-28 02:58:25,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562299010] [2020-11-28 02:58:25,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 02:58:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 02:58:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-11-28 02:58:25,188 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-11-28 02:58:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:25,300 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-11-28 02:58:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:58:25,302 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-11-28 02:58:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:25,302 INFO L225 Difference]: With dead ends: 41 [2020-11-28 02:58:25,302 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 02:58:25,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-11-28 02:58:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 02:58:25,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-11-28 02:58:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 02:58:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-28 02:58:25,308 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-11-28 02:58:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:25,309 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-28 02:58:25,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 02:58:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-28 02:58:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 02:58:25,313 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:25,314 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:25,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:25,519 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash 894625264, now seen corresponding path program 4 times [2020-11-28 02:58:25,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:25,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218870665] [2020-11-28 02:58:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:25,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218870665] [2020-11-28 02:58:25,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289438598] [2020-11-28 02:58:25,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:25,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 02:58:25,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 02:58:25,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:26,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:26,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-11-28 02:58:26,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320457508] [2020-11-28 02:58:26,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-28 02:58:26,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-28 02:58:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-11-28 02:58:26,007 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-11-28 02:58:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:26,117 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-11-28 02:58:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 02:58:26,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-11-28 02:58:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:26,122 INFO L225 Difference]: With dead ends: 46 [2020-11-28 02:58:26,122 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 02:58:26,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-11-28 02:58:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 02:58:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-28 02:58:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 02:58:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-28 02:58:26,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2020-11-28 02:58:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:26,130 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-28 02:58:26,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-28 02:58:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-28 02:58:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 02:58:26,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:26,132 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:26,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:26,346 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1614989611, now seen corresponding path program 5 times [2020-11-28 02:58:26,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:26,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147430292] [2020-11-28 02:58:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:26,372 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:26,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:26,451 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:26,451 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:58:26,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 02:58:26,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:26 BoogieIcfgContainer [2020-11-28 02:58:26,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:26,520 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:26,521 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:26,521 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:26,522 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:18" (3/4) ... [2020-11-28 02:58:26,524 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:58:26,629 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_92747a58-2dab-4e48-a639-fbce28fd69dd/bin/uautomizer/witness.graphml [2020-11-28 02:58:26,629 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:26,631 INFO L168 Benchmark]: Toolchain (without parser) took 9298.73 ms. Allocated memory was 92.3 MB in the beginning and 172.0 MB in the end (delta: 79.7 MB). Free memory was 63.0 MB in the beginning and 143.1 MB in the end (delta: -80.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:26,632 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory is still 49.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:26,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.02 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 63.0 MB in the beginning and 94.5 MB in the end (delta: -31.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.76 ms. Allocated memory is still 117.4 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,634 INFO L168 Benchmark]: Boogie Preprocessor took 54.27 ms. Allocated memory is still 117.4 MB. Free memory was 93.1 MB in the beginning and 92.5 MB in the end (delta: 622.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:26,635 INFO L168 Benchmark]: RCFGBuilder took 390.11 ms. Allocated memory is still 117.4 MB. Free memory was 91.9 MB in the beginning and 80.5 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,635 INFO L168 Benchmark]: TraceAbstraction took 8329.98 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 80.5 MB in the beginning and 146.3 MB in the end (delta: -65.8 MB). Peak memory consumption was 66.3 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,636 INFO L168 Benchmark]: Witness Printer took 108.74 ms. Allocated memory is still 172.0 MB. Free memory was 146.3 MB in the beginning and 143.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory is still 49.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.02 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 63.0 MB in the beginning and 94.5 MB in the end (delta: -31.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.76 ms. Allocated memory is still 117.4 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.27 ms. Allocated memory is still 117.4 MB. Free memory was 93.1 MB in the beginning and 92.5 MB in the end (delta: 622.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 390.11 ms. Allocated memory is still 117.4 MB. Free memory was 91.9 MB in the beginning and 80.5 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8329.98 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 80.5 MB in the beginning and 146.3 MB in the end (delta: -65.8 MB). Peak memory consumption was 66.3 MB. Max. memory is 16.1 GB. * Witness Printer took 108.74 ms. Allocated memory is still 172.0 MB. Free memory was 146.3 MB in the beginning and 143.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i