./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test24-2.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/ldv-regression/test24-2.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 45294379b83c6b60e0b0199955cdf7244f057430 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 16:57:35,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:57:35,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:57:35,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:57:35,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:57:35,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:57:35,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:57:35,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:57:35,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:57:35,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:57:35,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:57:35,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:57:35,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:57:35,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:57:35,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:57:35,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:57:35,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:57:35,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:57:35,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:57:35,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:57:35,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:57:35,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:57:35,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:57:35,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:57:35,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:57:35,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:57:35,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:57:35,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:57:35,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:57:35,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:57:35,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:57:35,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:57:35,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:57:35,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:57:35,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:57:35,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:57:35,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:57:35,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:57:35,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:57:35,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:57:35,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:57:35,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:57:36,037 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:57:36,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:57:36,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:57:36,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:57:36,042 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:57:36,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:57:36,043 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:57:36,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:57:36,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:57:36,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:57:36,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:57:36,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:57:36,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:57:36,045 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:57:36,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:57:36,046 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:57:36,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:57:36,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:57:36,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:57:36,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:57:36,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:57:36,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:57:36,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:57:36,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:57:36,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:57:36,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:57:36,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:57:36,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:57:36,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:57:36,051 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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2019-11-28 16:57:36,391 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:57:36,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:57:36,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:57:36,414 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:57:36,415 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:57:36,416 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-28 16:57:36,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dea7e365/64bbd678c71740019d92f7675e75826b/FLAG430fef107 [2019-11-28 16:57:36,994 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:57:36,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-28 16:57:37,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dea7e365/64bbd678c71740019d92f7675e75826b/FLAG430fef107 [2019-11-28 16:57:37,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dea7e365/64bbd678c71740019d92f7675e75826b [2019-11-28 16:57:37,386 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:57:37,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:57:37,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:37,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:57:37,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:57:37,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a6e3ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37, skipping insertion in model container [2019-11-28 16:57:37,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:57:37,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:57:37,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:37,678 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:57:37,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:37,803 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:57:37,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37 WrapperNode [2019-11-28 16:57:37,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:37,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:37,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:57:37,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:57:37,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:37,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:57:37,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:57:37,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:57:37,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:57:37,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:57:37,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:57:37,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:57:37,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (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 16:57:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:57:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:57:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:57:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:57:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 16:57:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:57:38,225 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:57:38,225 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-28 16:57:38,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:38 BoogieIcfgContainer [2019-11-28 16:57:38,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:57:38,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:57:38,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:57:38,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:57:38,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:57:37" (1/3) ... [2019-11-28 16:57:38,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21755f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:38, skipping insertion in model container [2019-11-28 16:57:38,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (2/3) ... [2019-11-28 16:57:38,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21755f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:38, skipping insertion in model container [2019-11-28 16:57:38,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:38" (3/3) ... [2019-11-28 16:57:38,236 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2019-11-28 16:57:38,252 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:57:38,263 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:57:38,280 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:57:38,336 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:57:38,336 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:57:38,337 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:57:38,337 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:57:38,337 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:57:38,337 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:57:38,338 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:57:38,338 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:57:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-28 16:57:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 16:57:38,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:38,384 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:38,384 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:38,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2019-11-28 16:57:38,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:38,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305283305] [2019-11-28 16:57:38,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:38,525 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 16:57:38,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305283305] [2019-11-28 16:57:38,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:38,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:57:38,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478341980] [2019-11-28 16:57:38,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:57:38,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:38,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:57:38,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:57:38,548 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-28 16:57:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:38,564 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-28 16:57:38,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:57:38,566 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-28 16:57:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:38,574 INFO L225 Difference]: With dead ends: 30 [2019-11-28 16:57:38,575 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 16:57:38,578 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 16:57:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 16:57:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 16:57:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 16:57:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-28 16:57:38,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-28 16:57:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:38,609 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-28 16:57:38,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:57:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-28 16:57:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 16:57:38,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:38,610 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:38,610 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:38,611 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2019-11-28 16:57:38,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:38,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485791951] [2019-11-28 16:57:38,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:38,665 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 16:57:38,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485791951] [2019-11-28 16:57:38,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:38,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 16:57:38,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058220477] [2019-11-28 16:57:38,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:57:38,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:57:38,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:57:38,669 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-28 16:57:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:38,695 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-28 16:57:38,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:57:38,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-28 16:57:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:38,697 INFO L225 Difference]: With dead ends: 24 [2019-11-28 16:57:38,697 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 16:57:38,699 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 16:57:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 16:57:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-28 16:57:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 16:57:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 16:57:38,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-28 16:57:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:38,705 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 16:57:38,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:57:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 16:57:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 16:57:38,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:38,706 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:38,707 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2019-11-28 16:57:38,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:38,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236902568] [2019-11-28 16:57:38,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:38,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236902568] [2019-11-28 16:57:38,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127254493] [2019-11-28 16:57:38,796 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 16:57:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:38,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 16:57:38,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:38,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:38,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-28 16:57:38,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746932119] [2019-11-28 16:57:38,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 16:57:38,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:38,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 16:57:38,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:57:38,932 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-28 16:57:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:38,964 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-28 16:57:38,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 16:57:38,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-28 16:57:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:38,966 INFO L225 Difference]: With dead ends: 26 [2019-11-28 16:57:38,966 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 16:57:38,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:57:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 16:57:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-28 16:57:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 16:57:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-28 16:57:38,973 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-28 16:57:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:38,973 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-28 16:57:38,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 16:57:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-28 16:57:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 16:57:38,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:38,975 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:39,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:39,176 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2019-11-28 16:57:39,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:39,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174572151] [2019-11-28 16:57:39,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:39,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174572151] [2019-11-28 16:57:39,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962292947] [2019-11-28 16:57:39,260 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:39,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 16:57:39,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:39,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 16:57:39,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:39,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:39,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-28 16:57:39,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422149584] [2019-11-28 16:57:39,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 16:57:39,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:39,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 16:57:39,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 16:57:39,361 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-28 16:57:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:39,401 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-28 16:57:39,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 16:57:39,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-28 16:57:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:39,405 INFO L225 Difference]: With dead ends: 28 [2019-11-28 16:57:39,405 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 16:57:39,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 16:57:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 16:57:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-28 16:57:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 16:57:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-28 16:57:39,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-28 16:57:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:39,415 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-28 16:57:39,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 16:57:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-28 16:57:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 16:57:39,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:39,419 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:39,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:39,623 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:39,624 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2019-11-28 16:57:39,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:39,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886099111] [2019-11-28 16:57:39,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:39,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886099111] [2019-11-28 16:57:39,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413442004] [2019-11-28 16:57:39,730 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:39,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 16:57:39,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:39,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 16:57:39,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:39,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:39,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 16:57:39,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356322058] [2019-11-28 16:57:39,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 16:57:39,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:39,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 16:57:39,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:57:39,828 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-28 16:57:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:39,869 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-28 16:57:39,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 16:57:39,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-28 16:57:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:39,872 INFO L225 Difference]: With dead ends: 30 [2019-11-28 16:57:39,872 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 16:57:39,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:57:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 16:57:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-28 16:57:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 16:57:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 16:57:39,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-28 16:57:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:39,881 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 16:57:39,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 16:57:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 16:57:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 16:57:39,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:39,883 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:40,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:40,088 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:40,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2019-11-28 16:57:40,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:40,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700002991] [2019-11-28 16:57:40,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:40,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700002991] [2019-11-28 16:57:40,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206668302] [2019-11-28 16:57:40,198 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:40,252 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 16:57:40,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:40,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 16:57:40,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:40,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:40,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 16:57:40,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416133547] [2019-11-28 16:57:40,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 16:57:40,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:40,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 16:57:40,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-28 16:57:40,290 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-28 16:57:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:40,330 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-28 16:57:40,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 16:57:40,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-28 16:57:40,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:40,332 INFO L225 Difference]: With dead ends: 32 [2019-11-28 16:57:40,332 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 16:57:40,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-28 16:57:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 16:57:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-28 16:57:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 16:57:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-28 16:57:40,337 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-28 16:57:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:40,337 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-28 16:57:40,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 16:57:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-28 16:57:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 16:57:40,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:40,338 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:40,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:40,543 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:40,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:40,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2019-11-28 16:57:40,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:40,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704192787] [2019-11-28 16:57:40,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:40,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704192787] [2019-11-28 16:57:40,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600313424] [2019-11-28 16:57:40,650 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:40,712 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 16:57:40,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:40,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 16:57:40,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:40,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:40,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-28 16:57:40,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282363487] [2019-11-28 16:57:40,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 16:57:40,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 16:57:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-28 16:57:40,750 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-28 16:57:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:40,796 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-28 16:57:40,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 16:57:40,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-28 16:57:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:40,797 INFO L225 Difference]: With dead ends: 34 [2019-11-28 16:57:40,798 INFO L226 Difference]: Without dead ends: 25 [2019-11-28 16:57:40,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-28 16:57:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-28 16:57:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-28 16:57:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 16:57:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-28 16:57:40,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-28 16:57:40,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:40,807 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-28 16:57:40,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 16:57:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-28 16:57:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 16:57:40,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:40,810 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:41,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:41,015 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2019-11-28 16:57:41,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:41,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48621365] [2019-11-28 16:57:41,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:41,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48621365] [2019-11-28 16:57:41,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548222011] [2019-11-28 16:57:41,135 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:41,247 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 16:57:41,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:41,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 16:57:41,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:41,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:41,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-28 16:57:41,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188612767] [2019-11-28 16:57:41,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 16:57:41,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 16:57:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-28 16:57:41,272 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-28 16:57:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:41,319 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-28 16:57:41,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 16:57:41,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-28 16:57:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:41,321 INFO L225 Difference]: With dead ends: 36 [2019-11-28 16:57:41,321 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 16:57:41,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-28 16:57:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 16:57:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-28 16:57:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 16:57:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 16:57:41,326 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-28 16:57:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:41,327 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 16:57:41,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 16:57:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 16:57:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 16:57:41,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:41,328 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:41,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:41,532 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2019-11-28 16:57:41,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:41,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121299536] [2019-11-28 16:57:41,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:41,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121299536] [2019-11-28 16:57:41,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466343139] [2019-11-28 16:57:41,648 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:41,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 16:57:41,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:41,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:41,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-28 16:57:41,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557152822] [2019-11-28 16:57:41,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 16:57:41,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:41,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 16:57:41,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-28 16:57:41,735 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-28 16:57:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:41,778 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-28 16:57:41,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 16:57:41,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-28 16:57:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:41,780 INFO L225 Difference]: With dead ends: 38 [2019-11-28 16:57:41,780 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 16:57:41,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-28 16:57:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 16:57:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-28 16:57:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 16:57:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-28 16:57:41,785 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-28 16:57:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:41,785 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-28 16:57:41,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 16:57:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-28 16:57:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 16:57:41,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:41,787 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:41,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:41,997 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:41,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2019-11-28 16:57:41,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:41,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638497698] [2019-11-28 16:57:41,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:42,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638497698] [2019-11-28 16:57:42,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705931687] [2019-11-28 16:57:42,121 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:42,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 16:57:42,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:42,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 16:57:42,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:42,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:42,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-28 16:57:42,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110856330] [2019-11-28 16:57:42,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 16:57:42,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:42,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 16:57:42,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-28 16:57:42,189 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-28 16:57:42,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:42,246 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-28 16:57:42,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 16:57:42,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-28 16:57:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:42,253 INFO L225 Difference]: With dead ends: 40 [2019-11-28 16:57:42,253 INFO L226 Difference]: Without dead ends: 31 [2019-11-28 16:57:42,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-28 16:57:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-28 16:57:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-28 16:57:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-28 16:57:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-28 16:57:42,260 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-28 16:57:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:42,260 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-28 16:57:42,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 16:57:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-28 16:57:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-28 16:57:42,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:42,262 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:42,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:42,466 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2019-11-28 16:57:42,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:42,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279120937] [2019-11-28 16:57:42,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:42,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279120937] [2019-11-28 16:57:42,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730570271] [2019-11-28 16:57:42,590 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:42,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 16:57:42,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:42,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 16:57:42,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:42,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:42,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-28 16:57:42,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390764567] [2019-11-28 16:57:42,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 16:57:42,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:42,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 16:57:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-28 16:57:42,912 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-28 16:57:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:43,008 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-28 16:57:43,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 16:57:43,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-28 16:57:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:43,013 INFO L225 Difference]: With dead ends: 42 [2019-11-28 16:57:43,013 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 16:57:43,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-28 16:57:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 16:57:43,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-28 16:57:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 16:57:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 16:57:43,021 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-28 16:57:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:43,023 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 16:57:43,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 16:57:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 16:57:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-28 16:57:43,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:43,026 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:43,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:43,235 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2019-11-28 16:57:43,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:43,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249476782] [2019-11-28 16:57:43,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249476782] [2019-11-28 16:57:43,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280801386] [2019-11-28 16:57:43,400 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:43,461 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 16:57:43,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:43,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 16:57:43,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:43,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-28 16:57:43,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013215347] [2019-11-28 16:57:43,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 16:57:43,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:43,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 16:57:43,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-28 16:57:43,497 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-28 16:57:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:43,559 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-28 16:57:43,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 16:57:43,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-28 16:57:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:43,560 INFO L225 Difference]: With dead ends: 44 [2019-11-28 16:57:43,560 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 16:57:43,561 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-28 16:57:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 16:57:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-28 16:57:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-28 16:57:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-28 16:57:43,568 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-11-28 16:57:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:43,569 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-28 16:57:43,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 16:57:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-28 16:57:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 16:57:43,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:43,572 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:43,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:43,773 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2019-11-28 16:57:43,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:43,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971622809] [2019-11-28 16:57:43,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971622809] [2019-11-28 16:57:43,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890635750] [2019-11-28 16:57:43,917 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:44,193 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-28 16:57:44,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:44,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 16:57:44,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:44,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:44,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-28 16:57:44,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582668609] [2019-11-28 16:57:44,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 16:57:44,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:44,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 16:57:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-28 16:57:44,223 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-11-28 16:57:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:44,285 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-28 16:57:44,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 16:57:44,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-28 16:57:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:44,287 INFO L225 Difference]: With dead ends: 46 [2019-11-28 16:57:44,287 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 16:57:44,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-28 16:57:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 16:57:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-28 16:57:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-28 16:57:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-28 16:57:44,291 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2019-11-28 16:57:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:44,291 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-28 16:57:44,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 16:57:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-28 16:57:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-28 16:57:44,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:44,293 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:44,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:44,493 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2019-11-28 16:57:44,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:44,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798546696] [2019-11-28 16:57:44,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:44,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798546696] [2019-11-28 16:57:44,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720734847] [2019-11-28 16:57:44,649 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:45,569 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-28 16:57:45,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:45,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 16:57:45,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:45,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:45,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-28 16:57:45,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871353724] [2019-11-28 16:57:45,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 16:57:45,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 16:57:45,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-28 16:57:45,599 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2019-11-28 16:57:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:45,673 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-28 16:57:45,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 16:57:45,674 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-28 16:57:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:45,675 INFO L225 Difference]: With dead ends: 48 [2019-11-28 16:57:45,675 INFO L226 Difference]: Without dead ends: 39 [2019-11-28 16:57:45,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-28 16:57:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-28 16:57:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-28 16:57:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 16:57:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 16:57:45,680 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2019-11-28 16:57:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:45,680 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 16:57:45,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 16:57:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 16:57:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-28 16:57:45,682 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:45,682 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:45,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:45,888 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2019-11-28 16:57:45,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:45,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568842965] [2019-11-28 16:57:45,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:46,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568842965] [2019-11-28 16:57:46,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535654398] [2019-11-28 16:57:46,077 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:46,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 16:57:46,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:46,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:46,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-28 16:57:46,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178919350] [2019-11-28 16:57:46,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 16:57:46,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:46,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 16:57:46,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-28 16:57:46,182 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-28 16:57:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:46,248 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-28 16:57:46,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 16:57:46,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-11-28 16:57:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:46,249 INFO L225 Difference]: With dead ends: 50 [2019-11-28 16:57:46,249 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 16:57:46,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-28 16:57:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 16:57:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-28 16:57:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-28 16:57:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-28 16:57:46,264 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-11-28 16:57:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:46,264 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-28 16:57:46,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 16:57:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-28 16:57:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 16:57:46,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:46,268 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:46,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:46,478 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:46,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2019-11-28 16:57:46,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:46,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472602111] [2019-11-28 16:57:46,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:46,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472602111] [2019-11-28 16:57:46,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671193413] [2019-11-28 16:57:46,646 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:46,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 16:57:46,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:46,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 16:57:46,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:46,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:46,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-28 16:57:46,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97727383] [2019-11-28 16:57:46,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 16:57:46,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 16:57:46,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-28 16:57:46,712 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2019-11-28 16:57:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:46,783 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-28 16:57:46,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 16:57:46,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-28 16:57:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:46,784 INFO L225 Difference]: With dead ends: 52 [2019-11-28 16:57:46,784 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 16:57:46,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-28 16:57:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 16:57:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-28 16:57:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-28 16:57:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-28 16:57:46,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2019-11-28 16:57:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:46,789 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-28 16:57:46,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 16:57:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-28 16:57:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-28 16:57:46,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:46,790 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:46,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:46,991 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:46,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:46,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2019-11-28 16:57:46,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:46,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005393379] [2019-11-28 16:57:46,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:47,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005393379] [2019-11-28 16:57:47,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888078929] [2019-11-28 16:57:47,196 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:48,495 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-28 16:57:48,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:48,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-28 16:57:48,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:48,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:48,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-28 16:57:48,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440498955] [2019-11-28 16:57:48,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-28 16:57:48,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 16:57:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-28 16:57:48,532 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2019-11-28 16:57:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:48,605 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-28 16:57:48,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-28 16:57:48,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-11-28 16:57:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:48,607 INFO L225 Difference]: With dead ends: 54 [2019-11-28 16:57:48,607 INFO L226 Difference]: Without dead ends: 45 [2019-11-28 16:57:48,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-28 16:57:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-28 16:57:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-28 16:57:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 16:57:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-28 16:57:48,613 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-11-28 16:57:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:48,614 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-28 16:57:48,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-28 16:57:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-28 16:57:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-28 16:57:48,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:48,615 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:48,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:48,819 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:48,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:48,820 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2019-11-28 16:57:48,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:48,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063434213] [2019-11-28 16:57:48,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:49,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063434213] [2019-11-28 16:57:49,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556502855] [2019-11-28 16:57:49,044 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:49,109 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 16:57:49,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:49,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 16:57:49,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:49,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:49,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-28 16:57:49,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045742406] [2019-11-28 16:57:49,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 16:57:49,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 16:57:49,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-28 16:57:49,150 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-11-28 16:57:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:49,224 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-28 16:57:49,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 16:57:49,226 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-11-28 16:57:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:49,226 INFO L225 Difference]: With dead ends: 56 [2019-11-28 16:57:49,227 INFO L226 Difference]: Without dead ends: 47 [2019-11-28 16:57:49,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-28 16:57:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-28 16:57:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-28 16:57:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-28 16:57:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-28 16:57:49,238 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-11-28 16:57:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:49,238 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-28 16:57:49,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 16:57:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-28 16:57:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 16:57:49,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:49,239 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:49,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:49,440 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2019-11-28 16:57:49,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:49,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562516771] [2019-11-28 16:57:49,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:49,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562516771] [2019-11-28 16:57:49,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087227384] [2019-11-28 16:57:49,667 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:50,959 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-28 16:57:50,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:50,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-28 16:57:50,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:50,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:50,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-28 16:57:50,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360640284] [2019-11-28 16:57:50,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-28 16:57:50,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-28 16:57:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-28 16:57:50,987 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2019-11-28 16:57:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:51,060 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-28 16:57:51,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-28 16:57:51,061 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-11-28 16:57:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:51,061 INFO L225 Difference]: With dead ends: 58 [2019-11-28 16:57:51,061 INFO L226 Difference]: Without dead ends: 49 [2019-11-28 16:57:51,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-28 16:57:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-28 16:57:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-28 16:57:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-28 16:57:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-28 16:57:51,066 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-11-28 16:57:51,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:51,066 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-28 16:57:51,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-28 16:57:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-28 16:57:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-28 16:57:51,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:51,067 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:51,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:51,268 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2019-11-28 16:57:51,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:51,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883617314] [2019-11-28 16:57:51,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:51,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883617314] [2019-11-28 16:57:51,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472827974] [2019-11-28 16:57:51,530 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:56,635 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-28 16:57:56,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:56,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 16:57:56,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:56,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:56,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-28 16:57:56,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998980480] [2019-11-28 16:57:56,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-28 16:57:56,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 16:57:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-28 16:57:56,668 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2019-11-28 16:57:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:56,741 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-28 16:57:56,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 16:57:56,747 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-11-28 16:57:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:56,747 INFO L225 Difference]: With dead ends: 60 [2019-11-28 16:57:56,748 INFO L226 Difference]: Without dead ends: 51 [2019-11-28 16:57:56,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-28 16:57:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-28 16:57:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-28 16:57:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-28 16:57:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-28 16:57:56,753 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2019-11-28 16:57:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:56,753 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-28 16:57:56,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-28 16:57:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-28 16:57:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-28 16:57:56,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:56,754 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:56,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:56,967 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2019-11-28 16:57:56,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:56,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871876360] [2019-11-28 16:57:56,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:57,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871876360] [2019-11-28 16:57:57,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145924541] [2019-11-28 16:57:57,262 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:57,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-28 16:57:57,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:57,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:57,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-28 16:57:57,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732831322] [2019-11-28 16:57:57,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-28 16:57:57,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-28 16:57:57,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-28 16:57:57,345 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2019-11-28 16:57:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:57,415 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-28 16:57:57,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-28 16:57:57,417 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-11-28 16:57:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:57,417 INFO L225 Difference]: With dead ends: 61 [2019-11-28 16:57:57,417 INFO L226 Difference]: Without dead ends: 52 [2019-11-28 16:57:57,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-28 16:57:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-28 16:57:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-28 16:57:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-28 16:57:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-28 16:57:57,428 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-11-28 16:57:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:57,429 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-28 16:57:57,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-28 16:57:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-28 16:57:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 16:57:57,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:57,431 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:57,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:57:57,632 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:57,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2019-11-28 16:57:57,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:57,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591725940] [2019-11-28 16:57:57,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:57:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:57:57,763 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:57:57,764 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:57:57,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:57:57 BoogieIcfgContainer [2019-11-28 16:57:57,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:57:57,808 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:57:57,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:57:57,808 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:57:57,809 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:38" (3/4) ... [2019-11-28 16:57:57,811 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:57:57,879 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:57:57,879 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:57:57,882 INFO L168 Benchmark]: Toolchain (without parser) took 20493.42 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 284.2 MB). Free memory was 959.0 MB in the beginning and 984.3 MB in the end (delta: -25.3 MB). Peak memory consumption was 258.9 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:57,882 INFO L168 Benchmark]: CDTParser took 0.87 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 16:57:57,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 414.69 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 959.0 MB in the beginning and 1.1 GB in the end (delta: -144.4 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:57,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.76 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 16:57:57,883 INFO L168 Benchmark]: Boogie Preprocessor took 57.04 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 16:57:57,884 INFO L168 Benchmark]: RCFGBuilder took 303.04 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: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:57,884 INFO L168 Benchmark]: TraceAbstraction took 19579.58 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 163.6 MB). Free memory was 1.1 GB in the beginning and 992.9 MB in the end (delta: 92.4 MB). Peak memory consumption was 256.0 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:57,885 INFO L168 Benchmark]: Witness Printer took 71.66 ms. Allocated memory is still 1.3 GB. Free memory was 992.9 MB in the beginning and 984.3 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:57,887 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87 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 414.69 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 959.0 MB in the beginning and 1.1 GB in the end (delta: -144.4 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 59.76 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. * Boogie Preprocessor took 57.04 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 303.04 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: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19579.58 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 163.6 MB). Free memory was 1.1 GB in the beginning and 992.9 MB in the end (delta: 92.4 MB). Peak memory consumption was 256.0 MB. Max. memory is 11.5 GB. * Witness Printer took 71.66 ms. Allocated memory is still 1.3 GB. Free memory was 992.9 MB in the beginning and 984.3 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.4s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 9.8s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2660 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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...