./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c1f4b5c4 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/s2iff.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 8967477fad3f63e2bfcd3e1f6a22d5ba8da6ea5b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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-c1f4b5c [2019-12-08 15:46:14,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-08 15:46:14,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-08 15:46:14,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-08 15:46:14,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-08 15:46:14,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-08 15:46:14,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-08 15:46:14,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-08 15:46:14,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-08 15:46:14,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-08 15:46:14,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-08 15:46:14,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-08 15:46:14,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-08 15:46:14,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-08 15:46:14,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-08 15:46:14,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-08 15:46:14,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-08 15:46:14,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-08 15:46:14,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-08 15:46:14,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-08 15:46:14,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-08 15:46:14,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-08 15:46:14,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-08 15:46:14,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-08 15:46:14,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-08 15:46:14,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-08 15:46:14,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-08 15:46:14,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-08 15:46:14,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-08 15:46:14,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-08 15:46:14,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-08 15:46:14,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-08 15:46:14,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-08 15:46:14,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-08 15:46:14,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-08 15:46:14,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-08 15:46:14,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-08 15:46:14,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-08 15:46:14,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-08 15:46:14,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-08 15:46:14,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-08 15:46:14,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-08 15:46:15,009 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-08 15:46:15,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-08 15:46:15,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-08 15:46:15,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-08 15:46:15,015 INFO L138 SettingsManager]: * Use SBE=true [2019-12-08 15:46:15,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-08 15:46:15,015 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-08 15:46:15,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-08 15:46:15,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-08 15:46:15,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-08 15:46:15,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-08 15:46:15,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-08 15:46:15,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-08 15:46:15,019 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-08 15:46:15,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-08 15:46:15,020 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-08 15:46:15,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-08 15:46:15,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-08 15:46:15,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-08 15:46:15,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-08 15:46:15,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-08 15:46:15,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-08 15:46:15,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-08 15:46:15,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-08 15:46:15,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-08 15:46:15,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-08 15:46:15,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-08 15:46:15,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-08 15:46:15,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-08 15:46:15,025 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 -> 8967477fad3f63e2bfcd3e1f6a22d5ba8da6ea5b [2019-12-08 15:46:15,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-08 15:46:15,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-08 15:46:15,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-08 15:46:15,356 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-08 15:46:15,357 INFO L275 PluginConnector]: CDTParser initialized [2019-12-08 15:46:15,358 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2iff.c [2019-12-08 15:46:15,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a507c8c9/77665d2364a949d894cce20314b81be0/FLAG904fc1496 [2019-12-08 15:46:15,854 INFO L306 CDTParser]: Found 1 translation units. [2019-12-08 15:46:15,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2iff.c [2019-12-08 15:46:15,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a507c8c9/77665d2364a949d894cce20314b81be0/FLAG904fc1496 [2019-12-08 15:46:16,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a507c8c9/77665d2364a949d894cce20314b81be0 [2019-12-08 15:46:16,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-08 15:46:16,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-08 15:46:16,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-08 15:46:16,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-08 15:46:16,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-08 15:46:16,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128831ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16, skipping insertion in model container [2019-12-08 15:46:16,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-08 15:46:16,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-08 15:46:16,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-08 15:46:16,496 INFO L203 MainTranslator]: Completed pre-run [2019-12-08 15:46:16,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-08 15:46:16,536 INFO L208 MainTranslator]: Completed translation [2019-12-08 15:46:16,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16 WrapperNode [2019-12-08 15:46:16,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-08 15:46:16,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-08 15:46:16,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-08 15:46:16,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-08 15:46:16,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-08 15:46:16,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-08 15:46:16,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-08 15:46:16,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-08 15:46:16,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-08 15:46:16,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-08 15:46:16,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-08 15:46:16,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-08 15:46:16,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (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 [2019-12-08 15:46:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-08 15:46:16,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-08 15:46:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-08 15:46:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-08 15:46:16,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-08 15:46:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-08 15:46:16,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-08 15:46:16,957 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-08 15:46:16,957 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-08 15:46:16,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:46:16 BoogieIcfgContainer [2019-12-08 15:46:16,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-08 15:46:16,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-08 15:46:16,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-08 15:46:16,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-08 15:46:16,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 03:46:16" (1/3) ... [2019-12-08 15:46:16,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3c167f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:46:16, skipping insertion in model container [2019-12-08 15:46:16,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16" (2/3) ... [2019-12-08 15:46:16,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3c167f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:46:16, skipping insertion in model container [2019-12-08 15:46:16,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:46:16" (3/3) ... [2019-12-08 15:46:16,977 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2019-12-08 15:46:16,989 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-08 15:46:16,996 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-08 15:46:17,014 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-08 15:46:17,047 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-08 15:46:17,047 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-08 15:46:17,048 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-08 15:46:17,048 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-08 15:46:17,048 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-08 15:46:17,049 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-08 15:46:17,049 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-08 15:46:17,049 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-08 15:46:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-08 15:46:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-08 15:46:17,073 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:17,075 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:17,076 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-12-08 15:46:17,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:17,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366415767] [2019-12-08 15:46:17,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-08 15:46:17,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366415767] [2019-12-08 15:46:17,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-08 15:46:17,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-08 15:46:17,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286506599] [2019-12-08 15:46:17,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-08 15:46:17,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-08 15:46:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-08 15:46:17,263 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-12-08 15:46:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:17,278 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-12-08 15:46:17,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-08 15:46:17,280 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-08 15:46:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:17,290 INFO L225 Difference]: With dead ends: 29 [2019-12-08 15:46:17,291 INFO L226 Difference]: Without dead ends: 13 [2019-12-08 15:46:17,294 INFO L631 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 [2019-12-08 15:46:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-08 15:46:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-08 15:46:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-08 15:46:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-12-08 15:46:17,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-12-08 15:46:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:17,332 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-08 15:46:17,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-08 15:46:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-08 15:46:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-08 15:46:17,333 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:17,333 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:17,334 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:17,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-12-08 15:46:17,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:17,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99493415] [2019-12-08 15:46:17,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-08 15:46:17,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99493415] [2019-12-08 15:46:17,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-08 15:46:17,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-08 15:46:17,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055561268] [2019-12-08 15:46:17,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-08 15:46:17,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-08 15:46:17,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-08 15:46:17,414 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-12-08 15:46:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:17,467 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-12-08 15:46:17,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-08 15:46:17,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-12-08 15:46:17,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:17,468 INFO L225 Difference]: With dead ends: 23 [2019-12-08 15:46:17,468 INFO L226 Difference]: Without dead ends: 15 [2019-12-08 15:46:17,470 INFO L631 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 [2019-12-08 15:46:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-08 15:46:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-08 15:46:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-08 15:46:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-08 15:46:17,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-12-08 15:46:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:17,475 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-08 15:46:17,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-08 15:46:17,475 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-12-08 15:46:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-08 15:46:17,476 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:17,476 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:17,477 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-12-08 15:46:17,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:17,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811935971] [2019-12-08 15:46:17,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-08 15:46:17,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811935971] [2019-12-08 15:46:17,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-08 15:46:17,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-08 15:46:17,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20116403] [2019-12-08 15:46:17,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-08 15:46:17,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:17,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-08 15:46:17,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-08 15:46:17,560 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-12-08 15:46:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:17,612 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-12-08 15:46:17,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-08 15:46:17,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-12-08 15:46:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:17,613 INFO L225 Difference]: With dead ends: 22 [2019-12-08 15:46:17,614 INFO L226 Difference]: Without dead ends: 18 [2019-12-08 15:46:17,614 INFO L631 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 [2019-12-08 15:46:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-08 15:46:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-12-08 15:46:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-08 15:46:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-12-08 15:46:17,619 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-12-08 15:46:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:17,620 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-08 15:46:17,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-08 15:46:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-12-08 15:46:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-08 15:46:17,621 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:17,621 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:17,621 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:17,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:17,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-12-08 15:46:17,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:17,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038041938] [2019-12-08 15:46:17,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-08 15:46:18,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038041938] [2019-12-08 15:46:18,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288283928] [2019-12-08 15:46:18,093 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 [2019-12-08 15:46:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:18,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-08 15:46:18,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-08 15:46:18,244 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-08 15:46:18,246 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,263 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-08 15:46:18,279 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-08 15:46:18,279 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,299 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-08 15:46:18,299 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,300 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-12-08 15:46:18,359 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-12-08 15:46:18,360 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,384 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-08 15:46:18,385 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,385 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-12-08 15:46:18,631 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-08 15:46:18,632 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-12-08 15:46:18,633 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,678 INFO L614 ElimStorePlain]: treesize reduction 32, result has 63.2 percent of original size [2019-12-08 15:46:18,680 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-12-08 15:46:18,680 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-12-08 15:46:18,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-08 15:46:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-08 15:46:18,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-08 15:46:18,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-12-08 15:46:18,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503851969] [2019-12-08 15:46:18,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-08 15:46:18,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-08 15:46:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-12-08 15:46:18,796 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 18 states. [2019-12-08 15:46:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:19,472 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-12-08 15:46:19,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-08 15:46:19,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-08 15:46:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:19,476 INFO L225 Difference]: With dead ends: 33 [2019-12-08 15:46:19,476 INFO L226 Difference]: Without dead ends: 24 [2019-12-08 15:46:19,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2019-12-08 15:46:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-08 15:46:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-12-08 15:46:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-08 15:46:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-12-08 15:46:19,484 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-12-08 15:46:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:19,484 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-12-08 15:46:19,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-08 15:46:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-12-08 15:46:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-08 15:46:19,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:19,486 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:19,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-08 15:46:19,696 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-12-08 15:46:19,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:19,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266190726] [2019-12-08 15:46:19,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-08 15:46:19,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266190726] [2019-12-08 15:46:19,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441828956] [2019-12-08 15:46:19,825 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-12-08 15:46:19,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-08 15:46:19,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-08 15:46:19,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-08 15:46:19,890 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-08 15:46:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-08 15:46:19,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-08 15:46:19,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-08 15:46:19,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389427996] [2019-12-08 15:46:19,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-08 15:46:19,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:19,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-08 15:46:19,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-08 15:46:19,932 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-12-08 15:46:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:20,111 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-12-08 15:46:20,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-08 15:46:20,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-08 15:46:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:20,113 INFO L225 Difference]: With dead ends: 31 [2019-12-08 15:46:20,113 INFO L226 Difference]: Without dead ends: 27 [2019-12-08 15:46:20,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-08 15:46:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-08 15:46:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-12-08 15:46:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-08 15:46:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-08 15:46:20,121 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-12-08 15:46:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:20,121 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-08 15:46:20,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-08 15:46:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-08 15:46:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-08 15:46:20,123 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:20,123 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:20,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-08 15:46:20,327 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-12-08 15:46:20,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:20,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100363226] [2019-12-08 15:46:20,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-08 15:46:20,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100363226] [2019-12-08 15:46:20,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629632446] [2019-12-08 15:46:20,420 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-12-08 15:46:20,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-08 15:46:20,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-08 15:46:20,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-08 15:46:20,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-08 15:46:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-08 15:46:20,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-08 15:46:20,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-08 15:46:20,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031102384] [2019-12-08 15:46:20,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-08 15:46:20,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:20,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-08 15:46:20,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-08 15:46:20,514 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-12-08 15:46:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:20,645 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-12-08 15:46:20,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-08 15:46:20,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-12-08 15:46:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:20,648 INFO L225 Difference]: With dead ends: 35 [2019-12-08 15:46:20,648 INFO L226 Difference]: Without dead ends: 23 [2019-12-08 15:46:20,649 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-08 15:46:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-08 15:46:20,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-12-08 15:46:20,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-08 15:46:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-08 15:46:20,654 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-12-08 15:46:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:20,654 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-08 15:46:20,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-08 15:46:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-08 15:46:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-08 15:46:20,655 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:20,656 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:20,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-08 15:46:20,862 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:20,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-12-08 15:46:20,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:20,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410248886] [2019-12-08 15:46:20,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-08 15:46:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-08 15:46:20,944 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-08 15:46:20,945 INFO L476 BasicCegarLoop]: Counterexample might be feasible [2019-12-08 15:46:20,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 03:46:20 BoogieIcfgContainer [2019-12-08 15:46:20,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-08 15:46:20,984 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-08 15:46:20,984 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-08 15:46:20,985 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-08 15:46:20,985 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:46:16" (3/4) ... [2019-12-08 15:46:20,987 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-08 15:46:21,058 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-12-08 15:46:21,059 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-08 15:46:21,060 INFO L168 Benchmark]: Toolchain (without parser) took 4803.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 956.3 MB in the beginning and 775.5 MB in the end (delta: 180.8 MB). Peak memory consumption was 288.8 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:21,061 INFO L168 Benchmark]: CDTParser took 0.79 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. [2019-12-08 15:46:21,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.93 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:21,064 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -158.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:21,064 INFO L168 Benchmark]: Boogie Preprocessor took 26.77 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:21,065 INFO L168 Benchmark]: RCFGBuilder took 297.01 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:21,067 INFO L168 Benchmark]: TraceAbstraction took 4024.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 779.3 MB in the end (delta: 298.1 MB). Peak memory consumption was 298.1 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:21,068 INFO L168 Benchmark]: Witness Printer took 74.56 ms. Allocated memory is still 1.1 GB. Free memory is still 775.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-08 15:46:21,073 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 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 278.93 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 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 96.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -158.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.77 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 297.01 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4024.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 779.3 MB in the end (delta: 298.1 MB). Peak memory consumption was 298.1 MB. Max. memory is 11.5 GB. * Witness Printer took 74.56 ms. Allocated memory is still 1.1 GB. Free memory is still 775.5 MB. There was no memory consumed. 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] sum[0] = 1 [L27] i=0 VAL [N=2] [L27] COND TRUE i