./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab 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/list-properties/list_flag-1.i -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 27e1465127a7716c3a524ea62953f8f9857cdca3 ....................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-30f4e4a [2019-11-27 23:52:24,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:52:24,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:52:24,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:52:24,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:52:24,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:52:24,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:52:24,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:52:24,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:52:24,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:52:24,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:52:24,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:52:24,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:52:24,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:52:24,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:52:24,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:52:24,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:52:24,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:52:24,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:52:24,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:52:24,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:52:24,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:52:24,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:52:24,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:52:24,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:52:24,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:52:24,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:52:24,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:52:24,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:52:24,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:52:24,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:52:24,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:52:24,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:52:24,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:52:24,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:52:24,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:52:24,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:52:24,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:52:24,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:52:24,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:52:24,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:52:24,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:52:24,402 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:52:24,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:52:24,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:52:24,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:52:24,404 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:52:24,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:52:24,405 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:52:24,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:52:24,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:52:24,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:52:24,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:52:24,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:52:24,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:52:24,407 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:52:24,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:52:24,407 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:52:24,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:52:24,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:52:24,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:52:24,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:52:24,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:52:24,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:52:24,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:52:24,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:52:24,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:52:24,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:52:24,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:52:24,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:52:24,411 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 -> 27e1465127a7716c3a524ea62953f8f9857cdca3 [2019-11-27 23:52:24,753 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:52:24,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:52:24,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:52:24,774 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:52:24,775 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:52:24,776 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-1.i [2019-11-27 23:52:24,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6044e879f/62381c2717d84f4a9673117411a62c9a/FLAG1b9932ca6 [2019-11-27 23:52:25,385 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:52:25,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-1.i [2019-11-27 23:52:25,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6044e879f/62381c2717d84f4a9673117411a62c9a/FLAG1b9932ca6 [2019-11-27 23:52:25,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6044e879f/62381c2717d84f4a9673117411a62c9a [2019-11-27 23:52:25,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:52:25,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:52:25,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:52:25,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:52:25,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:52:25,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:52:25" (1/1) ... [2019-11-27 23:52:25,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e4995b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:25, skipping insertion in model container [2019-11-27 23:52:25,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:52:25" (1/1) ... [2019-11-27 23:52:25,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:52:25,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:52:26,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:52:26,177 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:52:26,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:52:26,322 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:52:26,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26 WrapperNode [2019-11-27 23:52:26,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:52:26,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:52:26,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:52:26,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:52:26,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:52:26,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:52:26,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:52:26,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:52:26,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (1/1) ... [2019-11-27 23:52:26,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:52:26,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:52:26,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:52:26,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:52:26,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (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 [2019-11-27 23:52:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:52:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 23:52:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 23:52:26,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-27 23:52:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-27 23:52:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:52:26,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:52:26,810 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:52:26,810 INFO L297 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-27 23:52:26,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:52:26 BoogieIcfgContainer [2019-11-27 23:52:26,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:52:26,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:52:26,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:52:26,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:52:26,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:52:25" (1/3) ... [2019-11-27 23:52:26,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d06e610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:52:26, skipping insertion in model container [2019-11-27 23:52:26,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:52:26" (2/3) ... [2019-11-27 23:52:26,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d06e610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:52:26, skipping insertion in model container [2019-11-27 23:52:26,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:52:26" (3/3) ... [2019-11-27 23:52:26,833 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2019-11-27 23:52:26,844 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:52:26,852 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:52:26,865 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:52:26,891 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:52:26,892 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:52:26,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:52:26,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:52:26,892 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:52:26,893 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:52:26,893 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:52:26,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:52:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-27 23:52:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-27 23:52:26,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:52:26,921 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:52:26,922 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:52:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:52:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1941242346, now seen corresponding path program 1 times [2019-11-27 23:52:26,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:52:26,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198235148] [2019-11-27 23:52:26,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:52:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:52:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:52:27,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198235148] [2019-11-27 23:52:27,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:52:27,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:52:27,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429192422] [2019-11-27 23:52:27,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:52:27,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:52:27,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:52:27,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:52:27,098 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-27 23:52:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:52:27,116 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2019-11-27 23:52:27,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:52:27,117 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-27 23:52:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:52:27,125 INFO L225 Difference]: With dead ends: 38 [2019-11-27 23:52:27,125 INFO L226 Difference]: Without dead ends: 20 [2019-11-27 23:52:27,128 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 [2019-11-27 23:52:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-27 23:52:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-27 23:52:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-27 23:52:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-27 23:52:27,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2019-11-27 23:52:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:52:27,163 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-27 23:52:27,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:52:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-27 23:52:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-27 23:52:27,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:52:27,165 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:52:27,165 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:52:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:52:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1795403316, now seen corresponding path program 1 times [2019-11-27 23:52:27,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:52:27,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624643046] [2019-11-27 23:52:27,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:52:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:52:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:52:27,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624643046] [2019-11-27 23:52:27,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:52:27,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-27 23:52:27,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708943515] [2019-11-27 23:52:27,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 23:52:27,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:52:27,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 23:52:27,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:52:27,303 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2019-11-27 23:52:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:52:27,446 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-11-27 23:52:27,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 23:52:27,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-27 23:52:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:52:27,448 INFO L225 Difference]: With dead ends: 44 [2019-11-27 23:52:27,448 INFO L226 Difference]: Without dead ends: 40 [2019-11-27 23:52:27,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-27 23:52:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-27 23:52:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-11-27 23:52:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-27 23:52:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-27 23:52:27,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2019-11-27 23:52:27,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:52:27,457 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-27 23:52:27,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 23:52:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-27 23:52:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-27 23:52:27,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:52:27,458 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:52:27,458 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:52:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:52:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1242942375, now seen corresponding path program 1 times [2019-11-27 23:52:27,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:52:27,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130398178] [2019-11-27 23:52:27,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:52:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:52:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:52:27,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130398178] [2019-11-27 23:52:27,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:52:27,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-27 23:52:27,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931510605] [2019-11-27 23:52:27,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 23:52:27,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:52:27,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 23:52:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:52:27,529 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2019-11-27 23:52:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:52:27,663 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-27 23:52:27,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 23:52:27,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-27 23:52:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:52:27,665 INFO L225 Difference]: With dead ends: 46 [2019-11-27 23:52:27,665 INFO L226 Difference]: Without dead ends: 38 [2019-11-27 23:52:27,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-27 23:52:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-27 23:52:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-11-27 23:52:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-27 23:52:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-27 23:52:27,682 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2019-11-27 23:52:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:52:27,683 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-27 23:52:27,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 23:52:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-27 23:52:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-27 23:52:27,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:52:27,684 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:52:27,684 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:52:27,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:52:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash -799146, now seen corresponding path program 1 times [2019-11-27 23:52:27,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:52:27,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307307557] [2019-11-27 23:52:27,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:52:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:52:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:52:27,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307307557] [2019-11-27 23:52:27,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:52:27,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-27 23:52:27,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303960010] [2019-11-27 23:52:27,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 23:52:27,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:52:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 23:52:27,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:52:27,767 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2019-11-27 23:52:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:52:27,869 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-11-27 23:52:27,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 23:52:27,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-27 23:52:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:52:27,871 INFO L225 Difference]: With dead ends: 44 [2019-11-27 23:52:27,871 INFO L226 Difference]: Without dead ends: 34 [2019-11-27 23:52:27,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-27 23:52:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-27 23:52:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2019-11-27 23:52:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-27 23:52:27,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-27 23:52:27,878 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2019-11-27 23:52:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:52:27,878 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-27 23:52:27,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 23:52:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-27 23:52:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 23:52:27,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:52:27,879 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:52:27,880 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:52:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:52:27,880 INFO L82 PathProgramCache]: Analyzing trace with hash -172690303, now seen corresponding path program 1 times [2019-11-27 23:52:27,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:52:27,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932363185] [2019-11-27 23:52:27,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:52:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:52:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:52:27,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932363185] [2019-11-27 23:52:27,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:52:27,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 23:52:27,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024536934] [2019-11-27 23:52:27,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 23:52:27,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:52:27,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 23:52:27,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:52:27,970 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-11-27 23:52:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:52:27,993 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-11-27 23:52:27,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:52:27,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-27 23:52:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:52:27,996 INFO L225 Difference]: With dead ends: 50 [2019-11-27 23:52:27,997 INFO L226 Difference]: Without dead ends: 34 [2019-11-27 23:52:27,997 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 [2019-11-27 23:52:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-27 23:52:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-11-27 23:52:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-27 23:52:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-27 23:52:28,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2019-11-27 23:52:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:52:28,006 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-27 23:52:28,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 23:52:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-27 23:52:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 23:52:28,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:52:28,008 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:52:28,008 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:52:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:52:28,009 INFO L82 PathProgramCache]: Analyzing trace with hash -616427248, now seen corresponding path program 1 times [2019-11-27 23:52:28,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:52:28,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176322420] [2019-11-27 23:52:28,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:52:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:52:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:52:28,092 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:52:28,093 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:52:28,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:52:28 BoogieIcfgContainer [2019-11-27 23:52:28,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:52:28,129 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:52:28,129 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:52:28,129 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:52:28,130 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:52:26" (3/4) ... [2019-11-27 23:52:28,132 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:52:28,186 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:52:28,187 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:52:28,189 INFO L168 Benchmark]: Toolchain (without parser) took 2473.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 952.3 MB in the beginning and 1.0 GB in the end (delta: -55.8 MB). Peak memory consumption was 86.8 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:28,190 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:52:28,190 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -177.4 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:28,191 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.50 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:28,192 INFO L168 Benchmark]: Boogie Preprocessor took 37.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:52:28,192 INFO L168 Benchmark]: RCFGBuilder took 390.52 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:28,193 INFO L168 Benchmark]: TraceAbstraction took 1311.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 78.9 MB). Peak memory consumption was 78.9 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:28,194 INFO L168 Benchmark]: Witness Printer took 58.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:52:28,198 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 607.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -177.4 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 57.50 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 390.52 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1311.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 78.9 MB). Peak memory consumption was 78.9 MB. Max. memory is 11.5 GB. * Witness Printer took 58.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = __VERIFIER_nondet_int(); [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) [L524] COND FALSE !(a == 0) [L525] p = a [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 1 [L532] t = (List) malloc(sizeof(struct node)) [L533] COND FALSE !(t == 0) [L534] p->n = t [L535] EXPR p->n [L535] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L537] p->h = 3 [L538] p = a [L539] COND TRUE \read(flag) [L540] EXPR p->h [L540] COND FALSE !(p->h == 2) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 71 SDslu, 136 SDs, 0 SdLazy, 135 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 2762 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...