./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s1iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c9c8a757 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/s1iff.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 f327e5a5b021f775646fced96474c3f2382bd51e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-c9c8a75 [2019-11-28 09:48:34,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 09:48:34,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 09:48:34,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 09:48:34,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 09:48:34,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 09:48:34,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 09:48:34,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 09:48:34,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 09:48:34,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 09:48:34,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 09:48:34,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 09:48:34,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 09:48:34,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 09:48:34,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 09:48:34,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 09:48:34,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 09:48:34,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 09:48:34,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 09:48:34,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 09:48:34,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 09:48:34,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 09:48:34,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 09:48:34,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 09:48:34,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 09:48:34,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 09:48:34,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 09:48:34,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 09:48:34,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 09:48:34,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 09:48:34,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 09:48:34,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 09:48:34,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 09:48:34,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 09:48:34,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 09:48:34,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 09:48:34,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 09:48:34,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 09:48:34,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 09:48:34,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 09:48:34,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 09:48:34,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 09:48:34,120 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 09:48:34,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 09:48:34,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 09:48:34,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 09:48:34,123 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 09:48:34,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 09:48:34,124 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 09:48:34,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 09:48:34,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 09:48:34,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 09:48:34,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 09:48:34,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 09:48:34,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 09:48:34,127 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 09:48:34,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 09:48:34,128 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 09:48:34,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 09:48:34,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 09:48:34,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 09:48:34,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 09:48:34,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 09:48:34,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 09:48:34,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 09:48:34,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 09:48:34,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 09:48:34,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 09:48:34,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 09:48:34,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 09:48:34,131 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 -> f327e5a5b021f775646fced96474c3f2382bd51e [2019-11-28 09:48:34,428 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 09:48:34,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 09:48:34,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 09:48:34,447 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 09:48:34,448 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 09:48:34,449 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s1iff.c [2019-11-28 09:48:34,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8aa4fb4b/9d35b85f1fa64639a477317f4b417039/FLAG8ad0d4d9b [2019-11-28 09:48:34,983 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 09:48:34,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s1iff.c [2019-11-28 09:48:34,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8aa4fb4b/9d35b85f1fa64639a477317f4b417039/FLAG8ad0d4d9b [2019-11-28 09:48:35,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8aa4fb4b/9d35b85f1fa64639a477317f4b417039 [2019-11-28 09:48:35,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 09:48:35,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 09:48:35,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 09:48:35,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 09:48:35,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 09:48:35,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b95a8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35, skipping insertion in model container [2019-11-28 09:48:35,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 09:48:35,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 09:48:35,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 09:48:35,580 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 09:48:35,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 09:48:35,618 INFO L208 MainTranslator]: Completed translation [2019-11-28 09:48:35,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35 WrapperNode [2019-11-28 09:48:35,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 09:48:35,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 09:48:35,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 09:48:35,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 09:48:35,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 09:48:35,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 09:48:35,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 09:48:35,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 09:48:35,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... [2019-11-28 09:48:35,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 09:48:35,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 09:48:35,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 09:48:35,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 09:48:35,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 09:48:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 09:48:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 09:48:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 09:48:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 09:48:35,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 09:48:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 09:48:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 09:48:36,093 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 09:48:36,094 INFO L297 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-28 09:48:36,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:48:36 BoogieIcfgContainer [2019-11-28 09:48:36,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 09:48:36,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 09:48:36,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 09:48:36,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 09:48:36,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 09:48:35" (1/3) ... [2019-11-28 09:48:36,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a21bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 09:48:36, skipping insertion in model container [2019-11-28 09:48:36,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:48:35" (2/3) ... [2019-11-28 09:48:36,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a21bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 09:48:36, skipping insertion in model container [2019-11-28 09:48:36,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:48:36" (3/3) ... [2019-11-28 09:48:36,116 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2019-11-28 09:48:36,125 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 09:48:36,130 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 09:48:36,141 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 09:48:36,163 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 09:48:36,163 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 09:48:36,164 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 09:48:36,164 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 09:48:36,164 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 09:48:36,164 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 09:48:36,165 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 09:48:36,165 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 09:48:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-28 09:48:36,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 09:48:36,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 09:48:36,184 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 09:48:36,185 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 09:48:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 09:48:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-28 09:48:36,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 09:48:36,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096180331] [2019-11-28 09:48:36,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 09:48:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 09:48:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 09:48:36,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096180331] [2019-11-28 09:48:36,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 09:48:36,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 09:48:36,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988559452] [2019-11-28 09:48:36,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 09:48:36,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 09:48:36,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 09:48:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 09:48:36,348 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-28 09:48:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 09:48:36,363 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-28 09:48:36,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 09:48:36,364 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-28 09:48:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 09:48:36,372 INFO L225 Difference]: With dead ends: 29 [2019-11-28 09:48:36,372 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 09:48:36,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 09:48:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 09:48:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 09:48:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 09:48:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-28 09:48:36,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-28 09:48:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 09:48:36,409 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-28 09:48:36,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 09:48:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-28 09:48:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 09:48:36,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 09:48:36,411 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 09:48:36,411 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 09:48:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 09:48:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-28 09:48:36,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 09:48:36,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678584007] [2019-11-28 09:48:36,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 09:48:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 09:48:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 09:48:36,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678584007] [2019-11-28 09:48:36,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 09:48:36,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 09:48:36,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109798291] [2019-11-28 09:48:36,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 09:48:36,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 09:48:36,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 09:48:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 09:48:36,500 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-28 09:48:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 09:48:36,614 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-28 09:48:36,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 09:48:36,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-28 09:48:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 09:48:36,617 INFO L225 Difference]: With dead ends: 23 [2019-11-28 09:48:36,618 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 09:48:36,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 09:48:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 09:48:36,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-28 09:48:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 09:48:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-28 09:48:36,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-28 09:48:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 09:48:36,629 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-28 09:48:36,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 09:48:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-28 09:48:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 09:48:36,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 09:48:36,631 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 09:48:36,632 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 09:48:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 09:48:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-28 09:48:36,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 09:48:36,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098964774] [2019-11-28 09:48:36,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 09:48:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 09:48:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 09:48:36,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098964774] [2019-11-28 09:48:36,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 09:48:36,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 09:48:36,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980669735] [2019-11-28 09:48:36,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 09:48:36,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 09:48:36,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 09:48:36,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 09:48:36,751 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-28 09:48:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 09:48:36,817 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-28 09:48:36,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 09:48:36,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-28 09:48:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 09:48:36,818 INFO L225 Difference]: With dead ends: 22 [2019-11-28 09:48:36,818 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 09:48:36,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 09:48:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 09:48:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-28 09:48:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 09:48:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-28 09:48:36,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-28 09:48:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 09:48:36,826 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-28 09:48:36,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 09:48:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-28 09:48:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 09:48:36,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 09:48:36,829 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 09:48:36,830 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 09:48:36,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 09:48:36,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-28 09:48:36,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 09:48:36,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755776898] [2019-11-28 09:48:36,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 09:48:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 09:48:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 09:48:37,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755776898] [2019-11-28 09:48:37,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498344667] [2019-11-28 09:48:37,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 09:48:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 09:48:37,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 09:48:37,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 09:48:37,456 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 [2019-11-28 09:48:37,457 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 09:48:37,471 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 09:48:37,482 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 [2019-11-28 09:48:37,482 INFO L508 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-28 09:48:37,496 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 09:48:37,497 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 09:48:37,497 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-28 09:48:37,544 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 [2019-11-28 09:48:37,545 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 09:48:37,564 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 09:48:37,564 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 09:48:37,565 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-28 09:48:37,801 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 09:48:37,801 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 [2019-11-28 09:48:37,803 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 09:48:37,854 INFO L588 ElimStorePlain]: treesize reduction 24, result has 69.6 percent of original size [2019-11-28 09:48:37,857 INFO L508 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. [2019-11-28 09:48:37,857 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-11-28 09:48:37,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 09:48:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 09:48:37,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 09:48:37,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-28 09:48:37,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457806584] [2019-11-28 09:48:37,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 09:48:37,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 09:48:37,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 09:48:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-28 09:48:37,977 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 16 states. [2019-11-28 09:48:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 09:48:38,488 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-28 09:48:38,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 09:48:38,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-11-28 09:48:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 09:48:38,492 INFO L225 Difference]: With dead ends: 33 [2019-11-28 09:48:38,492 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 09:48:38,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-11-28 09:48:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 09:48:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-28 09:48:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 09:48:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-28 09:48:38,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-28 09:48:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 09:48:38,501 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-28 09:48:38,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 09:48:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-28 09:48:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 09:48:38,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 09:48:38,502 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 09:48:38,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 09:48:38,708 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 09:48:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 09:48:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-28 09:48:38,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 09:48:38,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387128035] [2019-11-28 09:48:38,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 09:48:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 09:48:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 09:48:38,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387128035] [2019-11-28 09:48:38,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502662751] [2019-11-28 09:48:38,806 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 [2019-11-28 09:48:38,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 09:48:38,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 09:48:38,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 09:48:38,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 09:48:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 09:48:38,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 09:48:38,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-28 09:48:38,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638309294] [2019-11-28 09:48:38,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 09:48:38,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 09:48:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 09:48:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 09:48:38,910 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-28 09:48:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 09:48:39,099 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-28 09:48:39,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 09:48:39,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-28 09:48:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 09:48:39,100 INFO L225 Difference]: With dead ends: 31 [2019-11-28 09:48:39,101 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 09:48:39,101 INFO L630 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 [2019-11-28 09:48:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 09:48:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-28 09:48:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 09:48:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-28 09:48:39,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-28 09:48:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 09:48:39,109 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-28 09:48:39,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 09:48:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-28 09:48:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 09:48:39,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 09:48:39,111 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 09:48:39,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 09:48:39,314 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 09:48:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 09:48:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-28 09:48:39,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 09:48:39,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544227182] [2019-11-28 09:48:39,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 09:48:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 09:48:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 09:48:39,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544227182] [2019-11-28 09:48:39,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796685170] [2019-11-28 09:48:39,402 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 [2019-11-28 09:48:39,458 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-28 09:48:39,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 09:48:39,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 09:48:39,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 09:48:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 09:48:39,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 09:48:39,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-28 09:48:39,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707892683] [2019-11-28 09:48:39,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 09:48:39,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 09:48:39,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 09:48:39,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-28 09:48:39,521 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-28 09:48:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 09:48:39,624 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-28 09:48:39,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 09:48:39,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-28 09:48:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 09:48:39,627 INFO L225 Difference]: With dead ends: 35 [2019-11-28 09:48:39,627 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 09:48:39,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-28 09:48:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 09:48:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-28 09:48:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 09:48:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-28 09:48:39,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-28 09:48:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 09:48:39,634 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-28 09:48:39,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 09:48:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-28 09:48:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 09:48:39,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 09:48:39,636 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 09:48:39,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 09:48:39,840 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 09:48:39,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 09:48:39,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-28 09:48:39,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 09:48:39,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901763252] [2019-11-28 09:48:39,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 09:48:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 09:48:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 09:48:39,930 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 09:48:39,930 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 09:48:39,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 09:48:39 BoogieIcfgContainer [2019-11-28 09:48:39,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 09:48:39,972 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 09:48:39,972 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 09:48:39,972 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 09:48:39,973 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:48:36" (3/4) ... [2019-11-28 09:48:39,975 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 09:48:40,031 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 09:48:40,032 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 09:48:40,034 INFO L168 Benchmark]: Toolchain (without parser) took 4704.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 955.0 MB in the beginning and 850.9 MB in the end (delta: 104.1 MB). Peak memory consumption was 255.6 MB. Max. memory is 11.5 GB. [2019-11-28 09:48:40,035 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 09:48:40,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.16 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 09:48:40,036 INFO L168 Benchmark]: Boogie Procedure Inliner took 103.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -204.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 09:48:40,037 INFO L168 Benchmark]: Boogie Preprocessor took 25.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-28 09:48:40,038 INFO L168 Benchmark]: RCFGBuilder took 348.46 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: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2019-11-28 09:48:40,039 INFO L168 Benchmark]: TraceAbstraction took 3872.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 857.5 MB in the end (delta: 265.2 MB). Peak memory consumption was 265.2 MB. Max. memory is 11.5 GB. [2019-11-28 09:48:40,039 INFO L168 Benchmark]: Witness Printer took 60.44 ms. Allocated memory is still 1.2 GB. Free memory was 857.5 MB in the beginning and 850.9 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-28 09:48:40,043 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 287.16 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 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 103.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -204.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 348.46 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: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3872.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 857.5 MB in the end (delta: 265.2 MB). Peak memory consumption was 265.2 MB. Max. memory is 11.5 GB. * Witness Printer took 60.44 ms. Allocated memory is still 1.2 GB. Free memory was 857.5 MB in the beginning and 850.9 MB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 1 [L27] i=0 VAL [N=2] [L27] COND TRUE i