./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s4iff.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/s4iff.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 aa2dda5680f87372970e50da43a1e6c1a86bd9e2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 15:46:14,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-08 15:46:14,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-08 15:46:14,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-08 15:46:14,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-08 15:46:14,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-08 15:46:14,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-08 15:46:14,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-08 15:46:14,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-08 15:46:14,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-08 15:46:14,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-08 15:46:14,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-08 15:46:14,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-08 15:46:14,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-08 15:46:14,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-08 15:46:14,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-08 15:46:14,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-08 15:46:14,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-08 15:46:14,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-08 15:46:14,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-08 15:46:14,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-08 15:46:14,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-08 15:46:14,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-08 15:46:14,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-08 15:46:14,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-08 15:46:14,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-08 15:46:14,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-08 15:46:14,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-08 15:46:14,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-08 15:46:14,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-08 15:46:14,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-08 15:46:14,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-08 15:46:14,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-08 15:46:14,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-08 15:46:14,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-08 15:46:14,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-08 15:46:14,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-08 15:46:14,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-08 15:46:14,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-08 15:46:14,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-08 15:46:14,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-08 15:46:14,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-08 15:46:14,846 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-08 15:46:14,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-08 15:46:14,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-08 15:46:14,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-08 15:46:14,849 INFO L138 SettingsManager]: * Use SBE=true [2019-12-08 15:46:14,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-08 15:46:14,849 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-08 15:46:14,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-08 15:46:14,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-08 15:46:14,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-08 15:46:14,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-08 15:46:14,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-08 15:46:14,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-08 15:46:14,851 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-08 15:46:14,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-08 15:46:14,852 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-08 15:46:14,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-08 15:46:14,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-08 15:46:14,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-08 15:46:14,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-08 15:46:14,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-08 15:46:14,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-08 15:46:14,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-08 15:46:14,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-08 15:46:14,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-08 15:46:14,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-08 15:46:14,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-08 15:46:14,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-08 15:46:14,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-08 15:46:14,855 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 -> aa2dda5680f87372970e50da43a1e6c1a86bd9e2 [2019-12-08 15:46:15,187 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-08 15:46:15,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-08 15:46:15,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-08 15:46:15,209 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-08 15:46:15,210 INFO L275 PluginConnector]: CDTParser initialized [2019-12-08 15:46:15,212 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4iff.c [2019-12-08 15:46:15,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/620167a55/82f0562dfd004fe2b32b8c4e02976d67/FLAGab56561d2 [2019-12-08 15:46:15,729 INFO L306 CDTParser]: Found 1 translation units. [2019-12-08 15:46:15,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4iff.c [2019-12-08 15:46:15,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/620167a55/82f0562dfd004fe2b32b8c4e02976d67/FLAGab56561d2 [2019-12-08 15:46:16,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/620167a55/82f0562dfd004fe2b32b8c4e02976d67 [2019-12-08 15:46:16,116 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-08 15:46:16,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-08 15:46:16,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-08 15:46:16,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-08 15:46:16,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-08 15:46:16,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141eb546 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 15:46:16,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:46:16" (1/1) ... [2019-12-08 15:46:16,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-08 15:46:16,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-08 15:46:16,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-08 15:46:16,379 INFO L203 MainTranslator]: Completed pre-run [2019-12-08 15:46:16,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-08 15:46:16,416 INFO L208 MainTranslator]: Completed translation [2019-12-08 15:46:16,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:46:16 WrapperNode [2019-12-08 15:46:16,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-08 15:46:16,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-08 15:46:16,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-08 15:46:16,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-08 15:46:16,425 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 15:46:16,491 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 15:46:16,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-08 15:46:16,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-08 15:46:16,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-08 15:46:16,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-08 15:46:16,523 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 15:46:16,523 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 15:46:16,525 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 15:46:16,526 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 15:46:16,532 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 15:46:16,537 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 15:46:16,540 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 15:46:16,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-08 15:46:16,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-08 15:46:16,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-08 15:46:16,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-08 15:46:16,544 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 15:46:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-08 15:46:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-08 15:46:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-08 15:46:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-08 15:46:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-08 15:46:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-08 15:46:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-08 15:46:16,840 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-08 15:46:16,840 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-08 15:46:16,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:46:16 BoogieIcfgContainer [2019-12-08 15:46:16,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-08 15:46:16,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-08 15:46:16,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-08 15:46:16,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-08 15:46:16,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 03:46:16" (1/3) ... [2019-12-08 15:46:16,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60531800 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 15:46:16,849 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 15:46:16,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60531800 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 15:46:16,850 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 15:46:16,852 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2019-12-08 15:46:16,864 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-08 15:46:16,872 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-08 15:46:16,885 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-08 15:46:16,920 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-08 15:46:16,921 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-08 15:46:16,921 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-08 15:46:16,921 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-08 15:46:16,921 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-08 15:46:16,922 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-08 15:46:16,922 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-08 15:46:16,922 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-08 15:46:16,942 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-08 15:46:16,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-08 15:46:16,950 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:16,951 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:16,952 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-12-08 15:46:16,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:16,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627390007] [2019-12-08 15:46:16,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:17,103 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 15:46:17,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627390007] [2019-12-08 15:46:17,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-08 15:46:17,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-08 15:46:17,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602966505] [2019-12-08 15:46:17,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-08 15:46:17,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-08 15:46:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-08 15:46:17,125 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-12-08 15:46:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:17,140 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-12-08 15:46:17,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-08 15:46:17,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-08 15:46:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:17,149 INFO L225 Difference]: With dead ends: 29 [2019-12-08 15:46:17,150 INFO L226 Difference]: Without dead ends: 13 [2019-12-08 15:46:17,152 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 15:46:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-08 15:46:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-08 15:46:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-08 15:46:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-12-08 15:46:17,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-12-08 15:46:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:17,181 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-08 15:46:17,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-08 15:46:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-08 15:46:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-08 15:46:17,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:17,182 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:17,183 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-12-08 15:46:17,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:17,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988088021] [2019-12-08 15:46:17,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:17,261 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 15:46:17,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988088021] [2019-12-08 15:46:17,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-08 15:46:17,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-08 15:46:17,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555709478] [2019-12-08 15:46:17,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-08 15:46:17,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:17,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-08 15:46:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-08 15:46:17,265 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-12-08 15:46:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:17,328 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-12-08 15:46:17,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-08 15:46:17,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-12-08 15:46:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:17,330 INFO L225 Difference]: With dead ends: 23 [2019-12-08 15:46:17,330 INFO L226 Difference]: Without dead ends: 15 [2019-12-08 15:46:17,331 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 15:46:17,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-08 15:46:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-08 15:46:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-08 15:46:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-08 15:46:17,336 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-12-08 15:46:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:17,336 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-08 15:46:17,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-08 15:46:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-12-08 15:46:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-08 15:46:17,337 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:17,337 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:17,338 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:17,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-12-08 15:46:17,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:17,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319564097] [2019-12-08 15:46:17,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:17,412 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 15:46:17,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319564097] [2019-12-08 15:46:17,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-08 15:46:17,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-08 15:46:17,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478761748] [2019-12-08 15:46:17,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-08 15:46:17,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-08 15:46:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-08 15:46:17,415 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-12-08 15:46:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:17,480 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-12-08 15:46:17,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-08 15:46:17,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-12-08 15:46:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:17,482 INFO L225 Difference]: With dead ends: 22 [2019-12-08 15:46:17,482 INFO L226 Difference]: Without dead ends: 18 [2019-12-08 15:46:17,483 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 15:46:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-08 15:46:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-12-08 15:46:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-08 15:46:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-12-08 15:46:17,488 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-12-08 15:46:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:17,489 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-08 15:46:17,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-08 15:46:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-12-08 15:46:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-08 15:46:17,490 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:17,490 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:17,491 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-12-08 15:46:17,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:17,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545987578] [2019-12-08 15:46:17,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:17,934 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 15:46:17,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545987578] [2019-12-08 15:46:17,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467254879] [2019-12-08 15:46:17,935 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 15:46:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:17,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-08 15:46:18,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-08 15:46:18,083 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 15:46:18,084 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,099 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-08 15:46:18,110 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 15:46:18,111 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,125 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-08 15:46:18,126 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 15:46:18,127 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-12-08 15:46:18,180 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 15:46:18,182 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,199 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-08 15:46:18,199 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,200 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-12-08 15:46:18,441 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-08 15:46:18,442 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 15:46:18,444 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-08 15:46:18,479 INFO L614 ElimStorePlain]: treesize reduction 32, result has 63.2 percent of original size [2019-12-08 15:46:18,483 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 15:46:18,483 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-12-08 15:46:18,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-08 15:46:18,599 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 15:46:18,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-08 15:46:18,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-12-08 15:46:18,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133271262] [2019-12-08 15:46:18,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-08 15:46:18,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:18,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-08 15:46:18,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-12-08 15:46:18,602 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 18 states. [2019-12-08 15:46:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:19,315 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-12-08 15:46:19,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-08 15:46:19,317 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-08 15:46:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:19,320 INFO L225 Difference]: With dead ends: 33 [2019-12-08 15:46:19,320 INFO L226 Difference]: Without dead ends: 24 [2019-12-08 15:46:19,322 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 15:46:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-08 15:46:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-12-08 15:46:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-08 15:46:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-12-08 15:46:19,329 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-12-08 15:46:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:19,330 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-12-08 15:46:19,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-08 15:46:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-12-08 15:46:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-08 15:46:19,331 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:19,332 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:19,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-08 15:46:19,536 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-12-08 15:46:19,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:19,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073509007] [2019-12-08 15:46:19,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:19,660 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 15:46:19,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073509007] [2019-12-08 15:46:19,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744931147] [2019-12-08 15:46:19,661 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 15:46:19,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-08 15:46:19,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-08 15:46:19,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-08 15:46:19,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-08 15:46:19,786 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 15:46:19,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-08 15:46:19,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-08 15:46:19,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752342910] [2019-12-08 15:46:19,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-08 15:46:19,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-08 15:46:19,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-08 15:46:19,788 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-12-08 15:46:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:19,945 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-12-08 15:46:19,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-08 15:46:19,946 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-08 15:46:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:19,947 INFO L225 Difference]: With dead ends: 31 [2019-12-08 15:46:19,947 INFO L226 Difference]: Without dead ends: 27 [2019-12-08 15:46:19,948 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 15:46:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-08 15:46:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-12-08 15:46:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-08 15:46:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-08 15:46:19,955 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-12-08 15:46:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:19,956 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-08 15:46:19,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-08 15:46:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-08 15:46:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-08 15:46:19,957 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:19,957 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:20,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-08 15:46:20,167 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:20,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-12-08 15:46:20,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:20,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933029445] [2019-12-08 15:46:20,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-08 15:46:20,229 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 15:46:20,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933029445] [2019-12-08 15:46:20,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920297187] [2019-12-08 15:46:20,230 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 15:46:20,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-08 15:46:20,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-08 15:46:20,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-08 15:46:20,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-08 15:46:20,320 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 15:46:20,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-08 15:46:20,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-08 15:46:20,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647900222] [2019-12-08 15:46:20,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-08 15:46:20,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-08 15:46:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-08 15:46:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-08 15:46:20,322 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-12-08 15:46:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-08 15:46:20,440 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-12-08 15:46:20,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-08 15:46:20,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-12-08 15:46:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-08 15:46:20,443 INFO L225 Difference]: With dead ends: 35 [2019-12-08 15:46:20,443 INFO L226 Difference]: Without dead ends: 23 [2019-12-08 15:46:20,444 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 15:46:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-08 15:46:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-12-08 15:46:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-08 15:46:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-08 15:46:20,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-12-08 15:46:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-08 15:46:20,450 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-08 15:46:20,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-08 15:46:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-08 15:46:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-08 15:46:20,450 INFO L403 BasicCegarLoop]: Found error trace [2019-12-08 15:46:20,451 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-08 15:46:20,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-08 15:46:20,652 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-08 15:46:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-08 15:46:20,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-12-08 15:46:20,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-08 15:46:20,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093583433] [2019-12-08 15:46:20,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-08 15:46:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-08 15:46:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-08 15:46:20,741 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-08 15:46:20,742 INFO L476 BasicCegarLoop]: Counterexample might be feasible [2019-12-08 15:46:20,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 03:46:20 BoogieIcfgContainer [2019-12-08 15:46:20,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-08 15:46:20,775 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-08 15:46:20,775 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-08 15:46:20,776 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-08 15:46:20,776 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 15:46:20,778 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-08 15:46:20,835 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-12-08 15:46:20,835 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-08 15:46:20,837 INFO L168 Benchmark]: Toolchain (without parser) took 4719.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.3 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -218.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-08 15:46:20,838 INFO L168 Benchmark]: CDTParser took 0.40 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 15:46:20,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.29 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:20,839 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:20,840 INFO L168 Benchmark]: Boogie Preprocessor took 27.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-08 15:46:20,841 INFO L168 Benchmark]: RCFGBuilder took 299.20 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: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-12-08 15:46:20,841 INFO L168 Benchmark]: TraceAbstraction took 3931.66 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -72.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-08 15:46:20,842 INFO L168 Benchmark]: Witness Printer took 59.91 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-08 15:46:20,846 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 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 297.29 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 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 97.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 299.20 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: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3931.66 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -72.3 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 59.91 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. 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