./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/ludcmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 32bec6c4f79c2e7c076e1f90ef84b3b02cfe5535 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 32bec6c4f79c2e7c076e1f90ef84b3b02cfe5535 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 18:39:53,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:39:53,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:39:53,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:39:53,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:39:53,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:39:53,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:39:53,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:39:53,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:39:53,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:39:53,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:39:53,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:39:53,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:39:53,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:39:53,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:39:53,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:39:53,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:39:53,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:39:53,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:39:53,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:39:53,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:39:53,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:39:53,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:39:53,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:39:53,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:39:53,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:39:53,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:39:53,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:39:53,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:39:53,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:39:53,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:39:53,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:39:53,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:39:53,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:39:53,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:39:53,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:39:53,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:39:53,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:39:53,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:39:53,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:39:53,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:39:53,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:39:53,632 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:39:53,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:39:53,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:39:53,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:39:53,633 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:39:53,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:39:53,634 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:39:53,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:39:53,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:39:53,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:39:53,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:39:53,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:39:53,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:39:53,635 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:39:53,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:39:53,635 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:39:53,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:39:53,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:39:53,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:39:53,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:39:53,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:39:53,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:39:53,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:39:53,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:39:53,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:39:53,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:39:53,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:39:53,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:39:53,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:39:53,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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(__VERIFIER_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 -> 32bec6c4f79c2e7c076e1f90ef84b3b02cfe5535 [2019-12-07 18:39:53,745 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:39:53,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:39:53,755 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:39:53,755 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:39:53,756 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:39:53,756 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/../../sv-benchmarks/c/loops/ludcmp.c [2019-12-07 18:39:53,792 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data/afb220913/2e7578afb10f482bba7c9170eaf84e09/FLAGdbe3de1bd [2019-12-07 18:39:54,137 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:39:54,138 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/sv-benchmarks/c/loops/ludcmp.c [2019-12-07 18:39:54,145 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data/afb220913/2e7578afb10f482bba7c9170eaf84e09/FLAGdbe3de1bd [2019-12-07 18:39:54,536 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data/afb220913/2e7578afb10f482bba7c9170eaf84e09 [2019-12-07 18:39:54,538 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:39:54,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:39:54,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:39:54,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:39:54,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:39:54,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c26b366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54, skipping insertion in model container [2019-12-07 18:39:54,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:39:54,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:39:54,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:39:54,718 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:39:54,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:39:54,752 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:39:54,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54 WrapperNode [2019-12-07 18:39:54,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:39:54,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:39:54,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:39:54,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:39:54,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:39:54,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:39:54,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:39:54,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:39:54,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... [2019-12-07 18:39:54,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:39:54,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:39:54,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:39:54,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:39:54,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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 [2019-12-07 18:39:54,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2019-12-07 18:39:54,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-12-07 18:39:54,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:39:54,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:39:54,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 18:39:54,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 18:39:55,087 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:39:55,087 INFO L287 CfgBuilder]: Removed 21 assume(true) statements. [2019-12-07 18:39:55,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:39:55 BoogieIcfgContainer [2019-12-07 18:39:55,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:39:55,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:39:55,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:39:55,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:39:55,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:39:54" (1/3) ... [2019-12-07 18:39:55,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797eb550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:39:55, skipping insertion in model container [2019-12-07 18:39:55,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:39:54" (2/3) ... [2019-12-07 18:39:55,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797eb550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:39:55, skipping insertion in model container [2019-12-07 18:39:55,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:39:55" (3/3) ... [2019-12-07 18:39:55,093 INFO L109 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2019-12-07 18:39:55,099 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:39:55,104 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:39:55,111 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:39:55,125 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:39:55,126 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:39:55,126 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:39:55,126 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:39:55,126 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:39:55,126 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:39:55,126 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:39:55,126 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:39:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-12-07 18:39:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 18:39:55,140 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:39:55,140 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:39:55,140 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:39:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:39:55,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2019-12-07 18:39:55,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:39:55,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483294949] [2019-12-07 18:39:55,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:39:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:39:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:55,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483294949] [2019-12-07 18:39:55,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:39:55,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:39:55,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289514404] [2019-12-07 18:39:55,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:39:55,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:39:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:39:55,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:39:55,272 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2019-12-07 18:39:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:39:55,312 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2019-12-07 18:39:55,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:39:55,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 18:39:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:39:55,320 INFO L225 Difference]: With dead ends: 102 [2019-12-07 18:39:55,320 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 18:39:55,322 INFO L630 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 [2019-12-07 18:39:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 18:39:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2019-12-07 18:39:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 18:39:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-07 18:39:55,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2019-12-07 18:39:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:39:55,344 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-07 18:39:55,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:39:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-12-07 18:39:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:39:55,345 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:39:55,345 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:39:55,345 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:39:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:39:55,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2019-12-07 18:39:55,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:39:55,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875592219] [2019-12-07 18:39:55,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:39:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:39:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:55,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875592219] [2019-12-07 18:39:55,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998697275] [2019-12-07 18:39:55,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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 [2019-12-07 18:39:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:39:55,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:39:55,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:39:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:55,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:39:55,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-12-07 18:39:55,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254720995] [2019-12-07 18:39:55,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:39:55,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:39:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:39:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:39:55,479 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2019-12-07 18:39:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:39:55,556 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2019-12-07 18:39:55,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:39:55,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-07 18:39:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:39:55,558 INFO L225 Difference]: With dead ends: 52 [2019-12-07 18:39:55,559 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 18:39:55,559 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:39:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 18:39:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-12-07 18:39:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 18:39:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-12-07 18:39:55,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2019-12-07 18:39:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:39:55,565 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-12-07 18:39:55,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:39:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-12-07 18:39:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:39:55,565 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:39:55,565 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:39:55,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:39:55,766 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:39:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:39:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2019-12-07 18:39:55,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:39:55,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407322025] [2019-12-07 18:39:55,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:39:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:39:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:55,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407322025] [2019-12-07 18:39:55,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733445024] [2019-12-07 18:39:55,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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 [2019-12-07 18:39:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:39:55,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 18:39:55,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:39:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:55,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:39:55,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-12-07 18:39:55,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362031268] [2019-12-07 18:39:55,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:39:55,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:39:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:39:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:39:55,931 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 10 states. [2019-12-07 18:39:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:39:56,033 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2019-12-07 18:39:56,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:39:56,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-07 18:39:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:39:56,035 INFO L225 Difference]: With dead ends: 64 [2019-12-07 18:39:56,035 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 18:39:56,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:39:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 18:39:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2019-12-07 18:39:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 18:39:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2019-12-07 18:39:56,040 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 15 [2019-12-07 18:39:56,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:39:56,040 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2019-12-07 18:39:56,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:39:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2019-12-07 18:39:56,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 18:39:56,041 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:39:56,041 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:39:56,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:39:56,243 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:39:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:39:56,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1388100565, now seen corresponding path program 2 times [2019-12-07 18:39:56,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:39:56,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697457933] [2019-12-07 18:39:56,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:39:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:39:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:56,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697457933] [2019-12-07 18:39:56,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731028310] [2019-12-07 18:39:56,340 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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 [2019-12-07 18:39:56,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:39:56,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:39:56,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:39:56,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:39:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:56,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:39:56,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-12-07 18:39:56,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164463803] [2019-12-07 18:39:56,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:39:56,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:39:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:39:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:39:56,418 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 12 states. [2019-12-07 18:39:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:39:56,539 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-12-07 18:39:56,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 18:39:56,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-12-07 18:39:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:39:56,540 INFO L225 Difference]: With dead ends: 76 [2019-12-07 18:39:56,540 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 18:39:56,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:39:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 18:39:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2019-12-07 18:39:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 18:39:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-12-07 18:39:56,546 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 19 [2019-12-07 18:39:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:39:56,546 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-12-07 18:39:56,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:39:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-12-07 18:39:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 18:39:56,547 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:39:56,547 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:39:56,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:39:56,748 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:39:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:39:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 3 times [2019-12-07 18:39:56,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:39:56,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678907844] [2019-12-07 18:39:56,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:39:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:39:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:56,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678907844] [2019-12-07 18:39:56,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196029242] [2019-12-07 18:39:56,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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 [2019-12-07 18:39:57,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 18:39:57,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:39:57,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 18:39:57,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:39:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:57,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:39:57,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-12-07 18:39:57,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671722882] [2019-12-07 18:39:57,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 18:39:57,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:39:57,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 18:39:57,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:39:57,098 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 17 states. [2019-12-07 18:39:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:39:58,858 INFO L93 Difference]: Finished difference Result 249 states and 311 transitions. [2019-12-07 18:39:58,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-12-07 18:39:58,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2019-12-07 18:39:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:39:58,860 INFO L225 Difference]: With dead ends: 249 [2019-12-07 18:39:58,860 INFO L226 Difference]: Without dead ends: 225 [2019-12-07 18:39:58,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1280, Invalid=4572, Unknown=0, NotChecked=0, Total=5852 [2019-12-07 18:39:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-07 18:39:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 126. [2019-12-07 18:39:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-07 18:39:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2019-12-07 18:39:58,874 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 23 [2019-12-07 18:39:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:39:58,874 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2019-12-07 18:39:58,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 18:39:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2019-12-07 18:39:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 18:39:58,875 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:39:58,875 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:39:59,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:39:59,077 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:39:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:39:59,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1523542023, now seen corresponding path program 4 times [2019-12-07 18:39:59,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:39:59,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784558951] [2019-12-07 18:39:59,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:39:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:39:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:59,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784558951] [2019-12-07 18:39:59,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602646137] [2019-12-07 18:39:59,178 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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 [2019-12-07 18:39:59,207 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:39:59,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:39:59,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:39:59,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:39:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:39:59,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:39:59,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-12-07 18:39:59,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152152969] [2019-12-07 18:39:59,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:39:59,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:39:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:39:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:39:59,268 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand 16 states. [2019-12-07 18:39:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:39:59,432 INFO L93 Difference]: Finished difference Result 279 states and 356 transitions. [2019-12-07 18:39:59,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 18:39:59,432 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-12-07 18:39:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:39:59,433 INFO L225 Difference]: With dead ends: 279 [2019-12-07 18:39:59,434 INFO L226 Difference]: Without dead ends: 192 [2019-12-07 18:39:59,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2019-12-07 18:39:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-07 18:39:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2019-12-07 18:39:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-07 18:39:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2019-12-07 18:39:59,446 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 27 [2019-12-07 18:39:59,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:39:59,446 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2019-12-07 18:39:59,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:39:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2019-12-07 18:39:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 18:39:59,448 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:39:59,448 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:39:59,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:39:59,649 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:39:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:39:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 5 times [2019-12-07 18:39:59,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:39:59,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093603039] [2019-12-07 18:39:59,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:39:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:39:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:39:59,727 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:39:59,727 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 18:39:59,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:39:59 BoogieIcfgContainer [2019-12-07 18:39:59,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:39:59,760 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:39:59,760 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:39:59,760 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:39:59,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:39:55" (3/4) ... [2019-12-07 18:39:59,762 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 18:39:59,762 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:39:59,764 INFO L168 Benchmark]: Toolchain (without parser) took 5224.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 948.9 MB in the beginning and 829.4 MB in the end (delta: 119.5 MB). Peak memory consumption was 266.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:39:59,764 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:39:59,765 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -146.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:39:59,765 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:39:59,766 INFO L168 Benchmark]: Boogie Preprocessor took 23.61 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:39:59,766 INFO L168 Benchmark]: RCFGBuilder took 279.99 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:39:59,767 INFO L168 Benchmark]: TraceAbstraction took 4670.39 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 46.7 MB). Free memory was 1.1 GB in the beginning and 829.4 MB in the end (delta: 226.6 MB). Peak memory consumption was 273.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:39:59,767 INFO L168 Benchmark]: Witness Printer took 2.85 ms. Allocated memory is still 1.2 GB. Free memory is still 829.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:39:59,773 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 213.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -146.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.61 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 279.99 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4670.39 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 46.7 MB). Free memory was 1.1 GB in the beginning and 829.4 MB in the end (delta: 226.6 MB). Peak memory consumption was 273.3 MB. Max. memory is 11.5 GB. * Witness Printer took 2.85 ms. Allocated memory is still 1.2 GB. Free memory is still 829.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_real at line 96, overapproximation of someBinaryArithmeticDOUBLEoperation at line 98. Possible FailurePath: [L69] double a[50][50], b[50], x[50]; VAL [a={3:0}, b={2:0}, x={4:0}] [L86] int i, j, nmax = 50, n = 5, chkerr; [L87] double eps, w; [L89] eps = 1.0e-6 [L91] i = 0 VAL [a={3:0}, b={2:0}, x={4:0}] [L91] COND TRUE i <= n [L93] w = 0.0 [L94] j = 0 VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND TRUE i == j [L97] EXPR a[i][j] [L97] a[i][j] *= 10.0 [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND FALSE !(j <= n) VAL [a={3:0}, b={2:0}, x={4:0}] [L4] COND TRUE !(cond) VAL [a={3:0}, b={2:0}, x={4:0}] [L5] __VERIFIER_error() VAL [a={3:0}, b={2:0}, x={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.6s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 899 SDslu, 318 SDs, 0 SdLazy, 639 SolverSat, 288 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 212 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 192 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 186 ConstructedInterpolants, 0 QuantifiedInterpolants, 28854 SizeOfPredicates, 10 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/190 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 18:40:01,139 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-12-07 18:40:01,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:40:01,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:40:01,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:40:01,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:40:01,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:40:01,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:40:01,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:40:01,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:40:01,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:40:01,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:40:01,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:40:01,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-12-07 18:40:01,184 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:40:01,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:40:01,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:40:01,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:40:01,186 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:40:01,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:40:01,186 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:40:01,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:40:01,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:40:01,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:40:01,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:40:01,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:40:01,187 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 18:40:01,187 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 18:40:01,187 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:40:01,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:40:01,187 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:40:01,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:40:01,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:40:01,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:40:01,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:40:01,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:40:01,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:40:01,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:40:01,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:40:01,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:40:01,189 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-12-07 18:40:01,189 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 18:40:01,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:40:01,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:40:01,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 18:40:01,190 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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(__VERIFIER_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 -> 32bec6c4f79c2e7c076e1f90ef84b3b02cfe5535 [2019-12-07 18:40:01,363 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:40:01,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:40:01,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:40:01,377 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:40:01,378 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:40:01,378 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/../../sv-benchmarks/c/loops/ludcmp.c [2019-12-07 18:40:01,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data/5128b6565/50e250ba07e2423a9f24854931fec5ca/FLAG26e6297b5 [2019-12-07 18:40:01,874 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:40:01,875 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/sv-benchmarks/c/loops/ludcmp.c [2019-12-07 18:40:01,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data/5128b6565/50e250ba07e2423a9f24854931fec5ca/FLAG26e6297b5 [2019-12-07 18:40:01,892 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/data/5128b6565/50e250ba07e2423a9f24854931fec5ca [2019-12-07 18:40:01,894 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:40:01,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:40:01,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:40:01,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:40:01,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:40:01,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:40:01" (1/1) ... [2019-12-07 18:40:01,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31403813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:01, skipping insertion in model container [2019-12-07 18:40:01,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:40:01" (1/1) ... [2019-12-07 18:40:01,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:40:01,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:40:02,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:40:02,067 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:40:02,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:40:02,140 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:40:02,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02 WrapperNode [2019-12-07 18:40:02,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:40:02,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:40:02,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:40:02,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:40:02,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:40:02,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:40:02,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:40:02,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:40:02,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... [2019-12-07 18:40:02,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:40:02,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:40:02,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:40:02,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:40:02,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/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 [2019-12-07 18:40:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2019-12-07 18:40:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2019-12-07 18:40:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:40:02,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:40:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 18:40:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 18:40:14,221 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:40:14,221 INFO L287 CfgBuilder]: Removed 21 assume(true) statements. [2019-12-07 18:40:14,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:40:14 BoogieIcfgContainer [2019-12-07 18:40:14,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:40:14,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:40:14,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:40:14,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:40:14,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:40:01" (1/3) ... [2019-12-07 18:40:14,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e835ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:40:14, skipping insertion in model container [2019-12-07 18:40:14,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:40:02" (2/3) ... [2019-12-07 18:40:14,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e835ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:40:14, skipping insertion in model container [2019-12-07 18:40:14,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:40:14" (3/3) ... [2019-12-07 18:40:14,227 INFO L109 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2019-12-07 18:40:14,233 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:40:14,237 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:40:14,244 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:40:14,261 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:40:14,261 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:40:14,261 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:40:14,261 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:40:14,261 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:40:14,262 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:40:14,262 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:40:14,262 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:40:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-12-07 18:40:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 18:40:14,276 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:40:14,277 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:40:14,277 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:40:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:40:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2019-12-07 18:40:14,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:40:14,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137040999] [2019-12-07 18:40:14,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 18:40:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:40:14,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 18:40:14,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:40:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:40:14,380 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:40:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:40:14,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137040999] [2019-12-07 18:40:14,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:40:14,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 18:40:14,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999785743] [2019-12-07 18:40:14,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:40:14,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:40:14,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:40:14,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:40:14,408 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 6 states. [2019-12-07 18:40:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:40:15,079 INFO L93 Difference]: Finished difference Result 103 states and 162 transitions. [2019-12-07 18:40:15,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:40:15,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-12-07 18:40:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:40:15,094 INFO L225 Difference]: With dead ends: 103 [2019-12-07 18:40:15,094 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 18:40:15,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:40:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 18:40:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-12-07 18:40:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 18:40:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-12-07 18:40:15,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2019-12-07 18:40:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:40:15,119 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-12-07 18:40:15,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:40:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-12-07 18:40:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:40:15,119 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:40:15,119 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:40:15,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 18:40:15,321 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:40:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:40:15,322 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 1 times [2019-12-07 18:40:15,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:40:15,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772401008] [2019-12-07 18:40:15,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 18:40:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:40:15,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:40:15,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:40:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:40:15,762 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:40:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:40:15,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772401008] [2019-12-07 18:40:15,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:40:15,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-12-07 18:40:15,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388541468] [2019-12-07 18:40:15,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:40:15,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:40:15,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:40:15,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:40:15,795 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 8 states. [2019-12-07 18:40:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:40:17,260 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2019-12-07 18:40:17,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:40:17,261 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-12-07 18:40:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:40:17,263 INFO L225 Difference]: With dead ends: 94 [2019-12-07 18:40:17,263 INFO L226 Difference]: Without dead ends: 78 [2019-12-07 18:40:17,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:40:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-07 18:40:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2019-12-07 18:40:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 18:40:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-12-07 18:40:17,273 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2019-12-07 18:40:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:40:17,273 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-12-07 18:40:17,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:40:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-12-07 18:40:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:40:17,273 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:40:17,274 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:40:17,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 18:40:17,474 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:40:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:40:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2019-12-07 18:40:17,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:40:17,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392439704] [2019-12-07 18:40:17,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 18:40:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:40:17,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 18:40:17,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:40:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:40:17,799 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:40:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:40:17,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392439704] [2019-12-07 18:40:17,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:40:17,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-12-07 18:40:17,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6853036] [2019-12-07 18:40:17,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:40:17,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:40:17,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:40:17,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:40:17,871 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 10 states. [2019-12-07 18:40:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:40:19,306 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2019-12-07 18:40:19,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:40:19,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-07 18:40:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:40:19,315 INFO L225 Difference]: With dead ends: 121 [2019-12-07 18:40:19,315 INFO L226 Difference]: Without dead ends: 98 [2019-12-07 18:40:19,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:40:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-12-07 18:40:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-12-07 18:40:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-07 18:40:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2019-12-07 18:40:19,326 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 15 [2019-12-07 18:40:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:40:19,326 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2019-12-07 18:40:19,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:40:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2019-12-07 18:40:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 18:40:19,327 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:40:19,327 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:40:19,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 18:40:19,528 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:40:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:40:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -642360546, now seen corresponding path program 2 times [2019-12-07 18:40:19,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:40:19,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563780495] [2019-12-07 18:40:19,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 18:40:20,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:40:20,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:40:20,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 18:40:20,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:40:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 18:40:20,316 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 18:40:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 18:40:20,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563780495] [2019-12-07 18:40:20,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:40:20,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-12-07 18:40:20,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403427805] [2019-12-07 18:40:20,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 18:40:20,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 18:40:20,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 18:40:20,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:40:20,402 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 14 states. [2019-12-07 18:40:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:40:25,638 INFO L93 Difference]: Finished difference Result 448 states and 518 transitions. [2019-12-07 18:40:25,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-07 18:40:25,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-12-07 18:40:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:40:25,641 INFO L225 Difference]: With dead ends: 448 [2019-12-07 18:40:25,641 INFO L226 Difference]: Without dead ends: 374 [2019-12-07 18:40:25,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=460, Invalid=1100, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 18:40:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2019-12-07 18:40:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 183. [2019-12-07 18:40:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-12-07 18:40:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2019-12-07 18:40:25,661 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 31 [2019-12-07 18:40:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:40:25,662 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2019-12-07 18:40:25,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 18:40:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2019-12-07 18:40:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 18:40:25,663 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:40:25,663 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:40:25,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 18:40:25,865 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:40:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:40:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 3 times [2019-12-07 18:40:25,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 18:40:25,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287917518] [2019-12-07 18:40:25,867 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 18:40:26,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-12-07 18:40:26,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-12-07 18:40:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:40:27,820 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-12-07 18:40:27,820 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 18:40:28,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-12-07 18:40:28,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:40:28 BoogieIcfgContainer [2019-12-07 18:40:28,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:40:28,083 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:40:28,083 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:40:28,083 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:40:28,083 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:40:14" (3/4) ... [2019-12-07 18:40:28,085 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 18:40:28,124 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_156c5eeb-7c66-4918-ab64-19dc9c906a6b/bin/uautomizer/witness.graphml [2019-12-07 18:40:28,124 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:40:28,125 INFO L168 Benchmark]: Toolchain (without parser) took 26229.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 202.4 MB). Free memory was 953.7 MB in the beginning and 1.1 GB in the end (delta: -179.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:40:28,125 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:40:28,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 953.7 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-12-07 18:40:28,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:40:28,126 INFO L168 Benchmark]: Boogie Preprocessor took 29.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:40:28,126 INFO L168 Benchmark]: RCFGBuilder took 12016.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:40:28,127 INFO L168 Benchmark]: TraceAbstraction took 13859.79 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -67.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:40:28,127 INFO L168 Benchmark]: Witness Printer took 41.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:40:28,128 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 244.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 953.7 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 12016.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13859.79 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -67.3 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 41.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L69] double a[50][50], b[50], x[50]; VAL [a={2:0}, b={7:0}, x={3:0}] [L86] int i, j, nmax = 50, n = 5, chkerr; [L87] double eps, w; [L89] eps = 1.0e-6 [L91] i = 0 VAL [a={2:0}, b={7:0}, x={3:0}] [L91] COND TRUE i <= n [L93] w = 0.0 [L94] j = 0 VAL [a={2:0}, b={7:0}, x={3:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={2:0}, b={7:0}, x={3:0}] [L97] COND TRUE i == j [L97] EXPR a[i][j] [L97] a[i][j] *= 10.0 [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={2:0}, b={7:0}, x={3:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={2:0}, b={7:0}, x={3:0}] [L97] COND FALSE !(i == j) VAL [a={2:0}, b={7:0}, x={3:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={2:0}, b={7:0}, x={3:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={2:0}, b={7:0}, x={3:0}] [L97] COND FALSE !(i == j) VAL [a={2:0}, b={7:0}, x={3:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={2:0}, b={7:0}, x={3:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={2:0}, b={7:0}, x={3:0}] [L97] COND FALSE !(i == j) VAL [a={2:0}, b={7:0}, x={3:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={2:0}, b={7:0}, x={3:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={2:0}, b={7:0}, x={3:0}] [L97] COND FALSE !(i == j) VAL [a={2:0}, b={7:0}, x={3:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={2:0}, b={7:0}, x={3:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={2:0}, b={7:0}, x={3:0}] [L97] COND FALSE !(i == j) VAL [a={2:0}, b={7:0}, x={3:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={2:0}, b={7:0}, x={3:0}] [L94] COND FALSE !(j <= n) VAL [a={2:0}, b={7:0}, x={3:0}] [L4] COND TRUE !(cond) VAL [a={2:0}, b={7:0}, x={3:0}] [L5] __VERIFIER_error() VAL [a={2:0}, b={7:0}, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Result: UNSAFE, OverallTime: 13.7s, OverallIterations: 5, TraceHistogramMax: 6, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 612 SDslu, 243 SDs, 0 SdLazy, 476 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 222 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 11720 SizeOfPredicates, 8 NumberOfNonLiveVariables, 202 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 76/156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...