./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condaf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/condaf.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 d0fe87725d099c7309e1044eb65f43c72d424092 ............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 15:33:14,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:33:14,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:33:14,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:33:14,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:33:14,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:33:14,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:33:15,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:33:15,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:33:15,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:33:15,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:33:15,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:33:15,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:33:15,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:33:15,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:33:15,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:33:15,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:33:15,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:33:15,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:33:15,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:33:15,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:33:15,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:33:15,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:33:15,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:33:15,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:33:15,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:33:15,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:33:15,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:33:15,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:33:15,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:33:15,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:33:15,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:33:15,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:33:15,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:33:15,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:33:15,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:33:15,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:33:15,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:33:15,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:33:15,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:33:15,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:33:15,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:33:15,105 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:33:15,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:33:15,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:33:15,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:33:15,108 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:33:15,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:33:15,110 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:33:15,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:33:15,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:33:15,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:33:15,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:33:15,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:33:15,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:33:15,113 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:33:15,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:33:15,114 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:33:15,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:33:15,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:33:15,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:33:15,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:33:15,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:33:15,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:33:15,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:33:15,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:33:15,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:33:15,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:33:15,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:33:15,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:33:15,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:33:15,119 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 -> d0fe87725d099c7309e1044eb65f43c72d424092 [2019-11-28 15:33:15,440 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:33:15,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:33:15,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:33:15,470 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:33:15,472 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:33:15,473 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condaf.c [2019-11-28 15:33:15,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318ff8ea/5411d5ce43d3499a90611431a2b58b06/FLAG904c208a1 [2019-11-28 15:33:16,030 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:33:16,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condaf.c [2019-11-28 15:33:16,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318ff8ea/5411d5ce43d3499a90611431a2b58b06/FLAG904c208a1 [2019-11-28 15:33:16,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318ff8ea/5411d5ce43d3499a90611431a2b58b06 [2019-11-28 15:33:16,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:33:16,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:33:16,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:16,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:33:16,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:33:16,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f897cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16, skipping insertion in model container [2019-11-28 15:33:16,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:33:16,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:33:16,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:16,667 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:33:16,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:16,707 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:33:16,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16 WrapperNode [2019-11-28 15:33:16,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:16,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:16,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:33:16,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:33:16,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:16,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:33:16,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:33:16,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:33:16,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (1/1) ... [2019-11-28 15:33:16,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:33:16,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:33:16,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:33:16,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:33:16,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (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 [2019-11-28 15:33:16,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 15:33:16,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 15:33:16,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 15:33:16,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:33:16,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:33:16,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 15:33:16,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 15:33:17,197 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:33:17,197 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-28 15:33:17,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:17 BoogieIcfgContainer [2019-11-28 15:33:17,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:33:17,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:33:17,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:33:17,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:33:17,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:33:16" (1/3) ... [2019-11-28 15:33:17,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cf3e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:17, skipping insertion in model container [2019-11-28 15:33:17,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:16" (2/3) ... [2019-11-28 15:33:17,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cf3e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:17, skipping insertion in model container [2019-11-28 15:33:17,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:17" (3/3) ... [2019-11-28 15:33:17,207 INFO L109 eAbstractionObserver]: Analyzing ICFG condaf.c [2019-11-28 15:33:17,219 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:33:17,226 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:33:17,239 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:33:17,268 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:33:17,268 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:33:17,268 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:33:17,269 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:33:17,269 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:33:17,269 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:33:17,269 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:33:17,269 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:33:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-28 15:33:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 15:33:17,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:17,289 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:17,290 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1306593900, now seen corresponding path program 1 times [2019-11-28 15:33:17,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:17,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580016251] [2019-11-28 15:33:17,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:17,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580016251] [2019-11-28 15:33:17,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:17,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:33:17,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369544089] [2019-11-28 15:33:17,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:33:17,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:33:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:33:17,465 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-28 15:33:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:17,481 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2019-11-28 15:33:17,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:33:17,483 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-28 15:33:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:17,493 INFO L225 Difference]: With dead ends: 35 [2019-11-28 15:33:17,493 INFO L226 Difference]: Without dead ends: 16 [2019-11-28 15:33:17,497 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:33:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-28 15:33:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-28 15:33:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 15:33:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-28 15:33:17,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2019-11-28 15:33:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:17,536 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-28 15:33:17,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:33:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-28 15:33:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 15:33:17,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:17,537 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:17,537 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash -875432925, now seen corresponding path program 1 times [2019-11-28 15:33:17,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:17,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74975266] [2019-11-28 15:33:17,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:17,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74975266] [2019-11-28 15:33:17,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:17,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:33:17,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699072498] [2019-11-28 15:33:17,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:33:17,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:33:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:33:17,680 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-11-28 15:33:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:17,733 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-28 15:33:17,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:33:17,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-28 15:33:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:17,734 INFO L225 Difference]: With dead ends: 29 [2019-11-28 15:33:17,734 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 15:33:17,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:33:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 15:33:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-28 15:33:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 15:33:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-28 15:33:17,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-28 15:33:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:17,741 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-28 15:33:17,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:33:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-28 15:33:17,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 15:33:17,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:17,742 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:17,742 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:17,743 INFO L82 PathProgramCache]: Analyzing trace with hash -100050171, now seen corresponding path program 1 times [2019-11-28 15:33:17,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:17,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795493397] [2019-11-28 15:33:17,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:33:17,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795493397] [2019-11-28 15:33:17,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:17,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 15:33:17,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14573535] [2019-11-28 15:33:17,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:33:17,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:33:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:33:17,847 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2019-11-28 15:33:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:17,921 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-11-28 15:33:17,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:33:17,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-28 15:33:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:17,922 INFO L225 Difference]: With dead ends: 30 [2019-11-28 15:33:17,923 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 15:33:17,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:33:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 15:33:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-11-28 15:33:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 15:33:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-28 15:33:17,929 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2019-11-28 15:33:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:17,929 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-28 15:33:17,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:33:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-28 15:33:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 15:33:17,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:17,930 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:17,931 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:17,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1777901324, now seen corresponding path program 1 times [2019-11-28 15:33:17,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:17,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773211501] [2019-11-28 15:33:17,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:33:18,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773211501] [2019-11-28 15:33:18,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758180441] [2019-11-28 15:33:18,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:18,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 15:33:18,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:18,402 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 15:33:18,402 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:33:18,407 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:33:18,408 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:33:18,408 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-28 15:33:18,462 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-11-28 15:33:18,464 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:33:18,467 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:33:18,468 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:33:18,468 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-28 15:33:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:33:18,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 15:33:18,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-28 15:33:18,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714964543] [2019-11-28 15:33:18,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 15:33:18,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:18,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 15:33:18,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-28 15:33:18,490 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2019-11-28 15:33:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:18,688 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-11-28 15:33:18,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 15:33:18,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-28 15:33:18,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:18,690 INFO L225 Difference]: With dead ends: 34 [2019-11-28 15:33:18,690 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 15:33:18,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-28 15:33:18,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 15:33:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-28 15:33:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 15:33:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-28 15:33:18,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2019-11-28 15:33:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:18,698 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-28 15:33:18,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 15:33:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-28 15:33:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 15:33:18,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:18,700 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:18,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:18,904 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:18,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1384874314, now seen corresponding path program 1 times [2019-11-28 15:33:18,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:18,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693833272] [2019-11-28 15:33:18,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:33:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:33:19,037 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:33:19,037 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:33:19,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:33:19 BoogieIcfgContainer [2019-11-28 15:33:19,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:33:19,074 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:33:19,074 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:33:19,074 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:33:19,075 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:17" (3/4) ... [2019-11-28 15:33:19,078 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:33:19,137 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:33:19,138 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:33:19,140 INFO L168 Benchmark]: Toolchain (without parser) took 2727.45 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.4 MB). Free memory was 960.4 MB in the beginning and 963.2 MB in the end (delta: -2.8 MB). Peak memory consumption was 113.5 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:19,141 INFO L168 Benchmark]: CDTParser took 0.91 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:33:19,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.79 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. [2019-11-28 15:33:19,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.4 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -156.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:19,143 INFO L168 Benchmark]: Boogie Preprocessor took 26.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:33:19,144 INFO L168 Benchmark]: RCFGBuilder took 358.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:19,145 INFO L168 Benchmark]: TraceAbstraction took 1873.49 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 970.0 MB in the end (delta: 115.2 MB). Peak memory consumption was 115.2 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:19,145 INFO L168 Benchmark]: Witness Printer took 64.16 ms. Allocated memory is still 1.1 GB. Free memory was 970.0 MB in the beginning and 963.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:19,149 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 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 294.79 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 104.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.4 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -156.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 358.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1873.49 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 970.0 MB in the end (delta: 115.2 MB). Peak memory consumption was 115.2 MB. Max. memory is 11.5 GB. * Witness Printer took 64.16 ms. Allocated memory is still 1.1 GB. Free memory was 970.0 MB in the beginning and 963.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 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] int sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 0 [L27] i=0 VAL [N=1] [L27] COND TRUE i