./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s3iff.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_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s3iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/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 4d0f1e455156ee86cfb94207e1fcb3202634fcf0 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 03:16:59,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:16:59,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:16:59,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:16:59,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:16:59,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:16:59,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:16:59,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:16:59,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:16:59,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:16:59,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:16:59,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:16:59,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:16:59,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:16:59,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:16:59,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:16:59,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:16:59,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:16:59,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:16:59,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:16:59,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:16:59,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:16:59,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:16:59,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:16:59,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:16:59,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:16:59,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:16:59,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:16:59,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:16:59,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:16:59,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:16:59,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:16:59,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:16:59,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:16:59,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:16:59,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:16:59,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:16:59,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:16:59,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:16:59,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:16:59,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:16:59,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:16:59,817 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:16:59,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:16:59,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:16:59,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:16:59,821 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:16:59,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:16:59,821 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:16:59,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:16:59,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:16:59,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:16:59,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:16:59,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:16:59,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:16:59,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:16:59,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:16:59,824 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:16:59,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:16:59,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:16:59,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:16:59,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:16:59,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:16:59,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:16:59,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:16:59,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:16:59,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:16:59,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:16:59,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:16:59,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:16:59,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:16:59,828 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_12d0410e-0300-4d49-9c31-aab26dec20d4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0f1e455156ee86cfb94207e1fcb3202634fcf0 [2020-11-28 03:17:00,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:17:00,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:17:00,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:17:00,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:17:00,204 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:17:00,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s3iff.c [2020-11-28 03:17:00,293 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/data/57702ea05/43428fc26d524f3ebf80981197d71bca/FLAG8ae9d06f5 [2020-11-28 03:17:00,856 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:17:00,856 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/sv-benchmarks/c/array-fpi/s3iff.c [2020-11-28 03:17:00,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/data/57702ea05/43428fc26d524f3ebf80981197d71bca/FLAG8ae9d06f5 [2020-11-28 03:17:01,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/data/57702ea05/43428fc26d524f3ebf80981197d71bca [2020-11-28 03:17:01,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:17:01,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:17:01,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:01,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:17:01,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:17:01,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19582754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01, skipping insertion in model container [2020-11-28 03:17:01,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:17:01,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:17:01,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:01,491 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:17:01,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:01,529 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:17:01,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01 WrapperNode [2020-11-28 03:17:01,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:01,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:17:01,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:17:01,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:17:01,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:17:01,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:17:01,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:17:01,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:17:01,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... [2020-11-28 03:17:01,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:17:01,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:17:01,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:17:01,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:17:01,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/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 03:17:01,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:17:01,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:17:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:17:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:17:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:17:01,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:17:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:17:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:17:02,291 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:17:02,291 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 03:17:02,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:02 BoogieIcfgContainer [2020-11-28 03:17:02,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:17:02,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:17:02,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:17:02,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:17:02,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:17:01" (1/3) ... [2020-11-28 03:17:02,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4ff44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:17:02, skipping insertion in model container [2020-11-28 03:17:02,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:01" (2/3) ... [2020-11-28 03:17:02,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4ff44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:17:02, skipping insertion in model container [2020-11-28 03:17:02,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:02" (3/3) ... [2020-11-28 03:17:02,305 INFO L111 eAbstractionObserver]: Analyzing ICFG s3iff.c [2020-11-28 03:17:02,316 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:17:02,322 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:17:02,336 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:17:02,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:17:02,374 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:17:02,374 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:17:02,374 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:17:02,374 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:17:02,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:17:02,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:17:02,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:17:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-28 03:17:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:17:02,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:02,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:02,401 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-11-28 03:17:02,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:02,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257158001] [2020-11-28 03:17:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:02,604 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 03:17:02,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257158001] [2020-11-28 03:17:02,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:02,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:17:02,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486395960] [2020-11-28 03:17:02,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:17:02,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:17:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:17:02,629 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-11-28 03:17:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:02,649 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-11-28 03:17:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:17:02,651 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-28 03:17:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:02,659 INFO L225 Difference]: With dead ends: 35 [2020-11-28 03:17:02,659 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 03:17:02,662 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 03:17:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 03:17:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 03:17:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 03:17:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-28 03:17:02,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-11-28 03:17:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:02,696 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-28 03:17:02,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:17:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-28 03:17:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:17:02,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:02,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:02,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:17:02,697 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:02,698 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-11-28 03:17:02,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:02,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888648359] [2020-11-28 03:17:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:02,802 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 03:17:02,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888648359] [2020-11-28 03:17:02,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:02,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:02,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721058858] [2020-11-28 03:17:02,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:02,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:02,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:02,806 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-28 03:17:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:02,918 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-11-28 03:17:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:02,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:17:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:02,920 INFO L225 Difference]: With dead ends: 28 [2020-11-28 03:17:02,920 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 03:17:02,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 03:17:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-11-28 03:17:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:17:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-28 03:17:02,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-11-28 03:17:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:02,932 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-28 03:17:02,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-28 03:17:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:17:02,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:02,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:02,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:17:02,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-11-28 03:17:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:02,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605331553] [2020-11-28 03:17:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:03,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605331553] [2020-11-28 03:17:03,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399043155] [2020-11-28 03:17:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/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 03:17:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-28 03:17:03,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:03,680 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-28 03:17:03,681 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:17:03,692 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:17:03,692 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:17:03,693 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-11-28 03:17:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:17:03,741 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-11-28 03:17:03,742 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:17:03,780 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:17:03,780 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:17:03,781 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-11-28 03:17:04,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:17:04,135 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:17:04,135 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-11-28 03:17:04,137 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:17:04,176 INFO L625 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-11-28 03:17:04,195 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-28 03:17:04,200 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-11-28 03:17:04,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:04,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:04,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:04,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:04,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:17:04,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-11-28 03:17:04,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864164550] [2020-11-28 03:17:04,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 03:17:04,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:04,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 03:17:04,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:17:04,573 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 16 states. [2020-11-28 03:17:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:05,101 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-11-28 03:17:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:17:05,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-11-28 03:17:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:05,104 INFO L225 Difference]: With dead ends: 35 [2020-11-28 03:17:05,104 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 03:17:05,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:17:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 03:17:05,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-11-28 03:17:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:17:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-28 03:17:05,111 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-11-28 03:17:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:05,111 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-28 03:17:05,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 03:17:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-28 03:17:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:17:05,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:05,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:05,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:17:05,321 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2020-11-28 03:17:05,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:05,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261798305] [2020-11-28 03:17:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:05,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261798305] [2020-11-28 03:17:05,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620246831] [2020-11-28 03:17:05,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/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 03:17:05,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:17:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:17:05,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:17:05,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:05,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:17:05,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-28 03:17:05,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745820254] [2020-11-28 03:17:05,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:17:05,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:05,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:17:05,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:17:05,600 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-11-28 03:17:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:05,808 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-28 03:17:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:17:05,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-11-28 03:17:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:05,810 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:17:05,810 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 03:17:05,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:17:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 03:17:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-11-28 03:17:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 03:17:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-28 03:17:05,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-11-28 03:17:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:05,816 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-28 03:17:05,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:17:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-28 03:17:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:17:05,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:05,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:06,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:17:06,018 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2020-11-28 03:17:06,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:06,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067328805] [2020-11-28 03:17:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:06,138 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 03:17:06,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067328805] [2020-11-28 03:17:06,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918228693] [2020-11-28 03:17:06,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/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 03:17:06,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 03:17:06,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:17:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:17:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:06,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:17:06,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-28 03:17:06,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001707348] [2020-11-28 03:17:06,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:17:06,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:17:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:17:06,272 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2020-11-28 03:17:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:06,394 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-11-28 03:17:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:17:06,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-11-28 03:17:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:06,395 INFO L225 Difference]: With dead ends: 37 [2020-11-28 03:17:06,395 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 03:17:06,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:17:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 03:17:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-28 03:17:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 03:17:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-28 03:17:06,403 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-11-28 03:17:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:06,403 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-28 03:17:06,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:17:06,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-28 03:17:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:17:06,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:06,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:06,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:17:06,628 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2020-11-28 03:17:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:06,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159733588] [2020-11-28 03:17:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:06,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:06,698 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:06,728 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:06,728 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:17:06,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:17:06,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:17:06 BoogieIcfgContainer [2020-11-28 03:17:06,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:17:06,792 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:17:06,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:17:06,795 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:17:06,795 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:02" (3/4) ... [2020-11-28 03:17:06,797 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:17:06,872 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_12d0410e-0300-4d49-9c31-aab26dec20d4/bin/uautomizer/witness.graphml [2020-11-28 03:17:06,872 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:17:06,873 INFO L168 Benchmark]: Toolchain (without parser) took 5654.15 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 67.0 MB in the beginning and 50.8 MB in the end (delta: 16.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:06,873 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory was 35.4 MB in the beginning and 35.4 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:17:06,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.16 ms. Allocated memory is still 98.6 MB. Free memory was 66.8 MB in the beginning and 75.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:06,874 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.24 ms. Allocated memory is still 98.6 MB. Free memory was 75.3 MB in the beginning and 73.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:06,875 INFO L168 Benchmark]: Boogie Preprocessor took 41.55 ms. Allocated memory is still 98.6 MB. Free memory was 73.8 MB in the beginning and 72.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:17:06,875 INFO L168 Benchmark]: RCFGBuilder took 674.15 ms. Allocated memory is still 98.6 MB. Free memory was 72.7 MB in the beginning and 58.0 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:06,876 INFO L168 Benchmark]: TraceAbstraction took 4494.26 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 57.5 MB in the beginning and 52.9 MB in the end (delta: 4.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:06,876 INFO L168 Benchmark]: Witness Printer took 80.47 ms. Allocated memory is still 123.7 MB. Free memory was 52.9 MB in the beginning and 50.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:06,879 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory was 35.4 MB in the beginning and 35.4 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.16 ms. Allocated memory is still 98.6 MB. Free memory was 66.8 MB in the beginning and 75.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.24 ms. Allocated memory is still 98.6 MB. Free memory was 75.3 MB in the beginning and 73.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.55 ms. Allocated memory is still 98.6 MB. Free memory was 73.8 MB in the beginning and 72.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 674.15 ms. Allocated memory is still 98.6 MB. Free memory was 72.7 MB in the beginning and 58.0 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4494.26 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 57.5 MB in the beginning and 52.9 MB in the end (delta: 4.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. * Witness Printer took 80.47 ms. Allocated memory is still 123.7 MB. Free memory was 52.9 MB in the beginning and 50.8 MB in the end (delta: 2.1 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: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i