./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/brs3f.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 a1a7cbd6e991197932302f7777b8b708f1820cc0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2019-11-28 15:32:59,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:32:59,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:32:59,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:32:59,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:32:59,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:32:59,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:32:59,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:32:59,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:32:59,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:32:59,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:32:59,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:32:59,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:32:59,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:32:59,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:32:59,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:32:59,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:32:59,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:32:59,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:32:59,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:32:59,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:32:59,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:32:59,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:32:59,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:32:59,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:32:59,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:32:59,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:32:59,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:32:59,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:32:59,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:32:59,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:32:59,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:32:59,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:32:59,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:32:59,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:32:59,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:32:59,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:32:59,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:32:59,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:32:59,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:32:59,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:32:59,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:32:59,937 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:32:59,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:32:59,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:32:59,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:32:59,943 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:32:59,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:32:59,945 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:32:59,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:32:59,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:32:59,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:32:59,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:32:59,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:32:59,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:32:59,947 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:32:59,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:32:59,948 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:32:59,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:32:59,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:32:59,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:32:59,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:32:59,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:32:59,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:32:59,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:32:59,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:32:59,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:32:59,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:32:59,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:32:59,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:32:59,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:32:59,952 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> a1a7cbd6e991197932302f7777b8b708f1820cc0 [2019-11-28 15:33:00,257 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:33:00,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:33:00,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:33:00,274 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:33:00,275 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:33:00,275 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs3f.c [2019-11-28 15:33:00,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ae8b1fe/2fd24226bda246b1924a1f158e4b62ab/FLAGd580b1c6b [2019-11-28 15:33:00,789 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:33:00,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs3f.c [2019-11-28 15:33:00,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ae8b1fe/2fd24226bda246b1924a1f158e4b62ab/FLAGd580b1c6b [2019-11-28 15:33:01,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ae8b1fe/2fd24226bda246b1924a1f158e4b62ab [2019-11-28 15:33:01,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:33:01,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:33:01,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:01,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:33:01,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:33:01,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74fcca56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01, skipping insertion in model container [2019-11-28 15:33:01,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:33:01,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:33:01,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:01,471 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:33:01,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:01,507 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:33:01,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01 WrapperNode [2019-11-28 15:33:01,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:01,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:01,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:33:01,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:33:01,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:01,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:33:01,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:33:01,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:33:01,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... [2019-11-28 15:33:01,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:33:01,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:33:01,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:33:01,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:33:01,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 15:33:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 15:33:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 15:33:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 15:33:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:33:01,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:33:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 15:33:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 15:33:01,945 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:33:01,945 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-28 15:33:01,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:01 BoogieIcfgContainer [2019-11-28 15:33:01,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:33:01,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:33:01,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:33:01,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:33:01,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:33:01" (1/3) ... [2019-11-28 15:33:01,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d50dfb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:01, skipping insertion in model container [2019-11-28 15:33:01,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:01" (2/3) ... [2019-11-28 15:33:01,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d50dfb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:01, skipping insertion in model container [2019-11-28 15:33:01,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:01" (3/3) ... [2019-11-28 15:33:01,980 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2019-11-28 15:33:02,009 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:33:02,023 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:33:02,036 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:33:02,062 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:33:02,062 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:33:02,063 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:33:02,063 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:33:02,063 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:33:02,063 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:33:02,063 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:33:02,064 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:33:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-28 15:33:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 15:33:02,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:02,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:02,084 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1623807605, now seen corresponding path program 1 times [2019-11-28 15:33:02,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:02,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488672277] [2019-11-28 15:33:02,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:02,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488672277] [2019-11-28 15:33:02,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:02,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:33:02,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595888479] [2019-11-28 15:33:02,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:33:02,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:33:02,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:33:02,291 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-11-28 15:33:02,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:02,310 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2019-11-28 15:33:02,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:33:02,312 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-28 15:33:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:02,325 INFO L225 Difference]: With dead ends: 30 [2019-11-28 15:33:02,325 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 15:33:02,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:33:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 15:33:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 15:33:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 15:33:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-28 15:33:02,362 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2019-11-28 15:33:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:02,363 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-28 15:33:02,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:33:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-28 15:33:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 15:33:02,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:02,364 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:02,365 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1308886944, now seen corresponding path program 1 times [2019-11-28 15:33:02,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:02,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642065649] [2019-11-28 15:33:02,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:02,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642065649] [2019-11-28 15:33:02,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:02,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:33:02,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779395675] [2019-11-28 15:33:02,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:33:02,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:02,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:33:02,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:33:02,445 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2019-11-28 15:33:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:02,524 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-11-28 15:33:02,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:33:02,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-28 15:33:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:02,526 INFO L225 Difference]: With dead ends: 28 [2019-11-28 15:33:02,526 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 15:33:02,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:33:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 15:33:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-28 15:33:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 15:33:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-28 15:33:02,532 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2019-11-28 15:33:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:02,532 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-28 15:33:02,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:33:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-28 15:33:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 15:33:02,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:02,534 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:02,535 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1738269227, now seen corresponding path program 1 times [2019-11-28 15:33:02,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:02,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127254493] [2019-11-28 15:33:02,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:33:02,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127254493] [2019-11-28 15:33:02,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:02,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 15:33:02,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801771977] [2019-11-28 15:33:02,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:33:02,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:02,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:33:02,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:33:02,632 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 4 states. [2019-11-28 15:33:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:02,696 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2019-11-28 15:33:02,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:33:02,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-28 15:33:02,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:02,697 INFO L225 Difference]: With dead ends: 27 [2019-11-28 15:33:02,698 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 15:33:02,699 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 [2019-11-28 15:33:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 15:33:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-28 15:33:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 15:33:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-28 15:33:02,704 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2019-11-28 15:33:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:02,705 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-28 15:33:02,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:33:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-28 15:33:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 15:33:02,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:02,706 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:02,707 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1896871737, now seen corresponding path program 1 times [2019-11-28 15:33:02,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:02,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746932119] [2019-11-28 15:33:02,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:33:02,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746932119] [2019-11-28 15:33:02,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:02,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 15:33:02,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721243094] [2019-11-28 15:33:02,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:33:02,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:33:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:33:02,811 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2019-11-28 15:33:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:02,879 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-11-28 15:33:02,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 15:33:02,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-28 15:33:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:02,880 INFO L225 Difference]: With dead ends: 25 [2019-11-28 15:33:02,881 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 15:33:02,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-28 15:33:02,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 15:33:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-28 15:33:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 15:33:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-28 15:33:02,887 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2019-11-28 15:33:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:02,887 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-28 15:33:02,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:33:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-28 15:33:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 15:33:02,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:02,889 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:02,889 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1877487447, now seen corresponding path program 1 times [2019-11-28 15:33:02,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:02,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796831741] [2019-11-28 15:33:02,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:03,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796831741] [2019-11-28 15:33:03,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907531099] [2019-11-28 15:33:03,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 15:33:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:03,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 15:33:03,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:03,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 15:33:03,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-28 15:33:03,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612223560] [2019-11-28 15:33:03,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 15:33:03,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 15:33:03,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-28 15:33:03,144 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 10 states. [2019-11-28 15:33:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:03,302 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-11-28 15:33:03,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 15:33:03,303 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-28 15:33:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:03,304 INFO L225 Difference]: With dead ends: 41 [2019-11-28 15:33:03,304 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 15:33:03,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-28 15:33:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 15:33:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-28 15:33:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 15:33:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-28 15:33:03,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2019-11-28 15:33:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:03,312 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-28 15:33:03,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 15:33:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-28 15:33:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 15:33:03,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:03,313 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:03,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:03,517 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1112618428, now seen corresponding path program 1 times [2019-11-28 15:33:03,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:03,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623720042] [2019-11-28 15:33:03,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:33:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:33:03,640 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:33:03,641 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:33:03,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:33:03 BoogieIcfgContainer [2019-11-28 15:33:03,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:33:03,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:33:03,681 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:33:03,681 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:33:03,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:01" (3/4) ... [2019-11-28 15:33:03,684 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:33:03,751 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:33:03,751 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:33:03,754 INFO L168 Benchmark]: Toolchain (without parser) took 2568.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 961.7 MB in the beginning and 1.0 GB in the end (delta: -46.1 MB). Peak memory consumption was 102.8 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:03,754 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:33:03,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.37 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:03,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:03,757 INFO L168 Benchmark]: Boogie Preprocessor took 26.81 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:03,757 INFO L168 Benchmark]: RCFGBuilder took 311.02 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:03,758 INFO L168 Benchmark]: TraceAbstraction took 1729.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 104.8 MB). Peak memory consumption was 104.8 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:03,759 INFO L168 Benchmark]: Witness Printer took 70.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:03,763 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 322.37 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 100.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.81 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 311.02 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1729.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 104.8 MB). Peak memory consumption was 104.8 MB. Max. memory is 11.5 GB. * Witness Printer took 70.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] i=0 VAL [N=2] [L26] COND TRUE i