./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 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 0.1.24-30f4e4a [2019-11-27 23:53:24,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:53:24,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:53:24,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:53:24,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:53:24,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:53:24,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:53:24,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:53:24,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:53:24,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:53:24,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:53:24,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:53:24,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:53:24,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:53:24,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:53:24,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:53:24,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:53:24,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:53:24,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:53:24,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:53:24,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:53:24,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:53:24,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:53:24,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:53:24,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:53:24,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:53:24,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:53:24,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:53:24,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:53:24,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:53:24,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:53:24,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:53:24,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:53:24,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:53:24,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:53:24,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:53:24,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:53:24,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:53:24,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:53:24,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:53:24,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:53:24,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:53:24,565 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:53:24,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:53:24,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:53:24,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:53:24,567 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:53:24,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:53:24,568 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:53:24,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:53:24,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:53:24,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:53:24,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:53:24,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:53:24,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:53:24,570 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:53:24,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:53:24,570 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:53:24,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:53:24,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:53:24,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:53:24,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:53:24,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:53:24,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:53:24,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:53:24,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:53:24,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:53:24,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:53:24,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:53:24,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:53:24,574 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 [2019-11-27 23:53:24,883 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:53:24,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:53:24,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:53:24,900 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:53:24,901 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:53:24,901 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-27 23:53:24,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e98dd2689/0edc60f3a29d460e9f2dd7f097e2d20f/FLAG4d197ee03 [2019-11-27 23:53:25,444 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:53:25,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-27 23:53:25,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e98dd2689/0edc60f3a29d460e9f2dd7f097e2d20f/FLAG4d197ee03 [2019-11-27 23:53:25,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e98dd2689/0edc60f3a29d460e9f2dd7f097e2d20f [2019-11-27 23:53:25,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:53:25,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:53:25,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:53:25,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:53:25,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:53:25,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:53:25" (1/1) ... [2019-11-27 23:53:25,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461fcea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:25, skipping insertion in model container [2019-11-27 23:53:25,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:53:25" (1/1) ... [2019-11-27 23:53:25,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:53:25,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:53:26,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:53:26,152 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:53:26,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:53:26,248 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:53:26,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26 WrapperNode [2019-11-27 23:53:26,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:53:26,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:53:26,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:53:26,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:53:26,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:53:26,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:53:26,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:53:26,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:53:26,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... [2019-11-27 23:53:26,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:53:26,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:53:26,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:53:26,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:53:26,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:53:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 23:53:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:53:26,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:53:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:53:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 23:53:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:53:26,631 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:53:26,631 INFO L297 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-27 23:53:26,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:53:26 BoogieIcfgContainer [2019-11-27 23:53:26,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:53:26,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:53:26,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:53:26,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:53:26,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:53:25" (1/3) ... [2019-11-27 23:53:26,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95d46ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:53:26, skipping insertion in model container [2019-11-27 23:53:26,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:53:26" (2/3) ... [2019-11-27 23:53:26,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95d46ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:53:26, skipping insertion in model container [2019-11-27 23:53:26,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:53:26" (3/3) ... [2019-11-27 23:53:26,666 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2019-11-27 23:53:26,695 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:53:26,714 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:53:26,731 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:53:26,756 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:53:26,756 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:53:26,757 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:53:26,757 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:53:26,757 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:53:26,757 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:53:26,757 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:53:26,757 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:53:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-27 23:53:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 23:53:26,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:26,781 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:26,781 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:26,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2019-11-27 23:53:26,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:26,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129491046] [2019-11-27 23:53:26,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:26,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129491046] [2019-11-27 23:53:26,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:53:26,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:53:26,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090383315] [2019-11-27 23:53:26,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:53:26,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:26,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:53:26,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:53:26,938 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-27 23:53:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:26,953 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-27 23:53:26,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:53:26,955 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-27 23:53:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:26,963 INFO L225 Difference]: With dead ends: 30 [2019-11-27 23:53:26,963 INFO L226 Difference]: Without dead ends: 13 [2019-11-27 23:53:26,966 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:53:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-27 23:53:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-27 23:53:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-27 23:53:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-27 23:53:27,001 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-27 23:53:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:27,001 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-27 23:53:27,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:53:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-27 23:53:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-27 23:53:27,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:27,002 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:27,003 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:27,003 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2019-11-27 23:53:27,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:27,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701784905] [2019-11-27 23:53:27,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:27,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701784905] [2019-11-27 23:53:27,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:53:27,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 23:53:27,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381535980] [2019-11-27 23:53:27,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 23:53:27,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:27,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 23:53:27,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:53:27,056 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-27 23:53:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:27,074 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-27 23:53:27,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:53:27,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-27 23:53:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:27,076 INFO L225 Difference]: With dead ends: 24 [2019-11-27 23:53:27,076 INFO L226 Difference]: Without dead ends: 15 [2019-11-27 23:53:27,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:53:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-27 23:53:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-27 23:53:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-27 23:53:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-27 23:53:27,081 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-27 23:53:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:27,081 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-27 23:53:27,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 23:53:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-27 23:53:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-27 23:53:27,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:27,082 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:27,083 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:27,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2019-11-27 23:53:27,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:27,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263346434] [2019-11-27 23:53:27,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:27,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263346434] [2019-11-27 23:53:27,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562836958] [2019-11-27 23:53:27,159 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 [2019-11-27 23:53:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:27,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 23:53:27,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:27,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:27,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-27 23:53:27,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014855591] [2019-11-27 23:53:27,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 23:53:27,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:27,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 23:53:27,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:53:27,250 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-27 23:53:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:27,276 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-27 23:53:27,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:53:27,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-27 23:53:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:27,278 INFO L225 Difference]: With dead ends: 26 [2019-11-27 23:53:27,278 INFO L226 Difference]: Without dead ends: 17 [2019-11-27 23:53:27,278 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 [2019-11-27 23:53:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-27 23:53:27,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-27 23:53:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-27 23:53:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-27 23:53:27,283 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-27 23:53:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:27,283 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-27 23:53:27,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 23:53:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-27 23:53:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-27 23:53:27,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:27,284 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:27,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:27,488 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2019-11-27 23:53:27,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:27,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809960978] [2019-11-27 23:53:27,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:27,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809960978] [2019-11-27 23:53:27,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222594167] [2019-11-27 23:53:27,614 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 [2019-11-27 23:53:27,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 23:53:27,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:27,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-27 23:53:27,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:27,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:27,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-27 23:53:27,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252176209] [2019-11-27 23:53:27,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-27 23:53:27,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:27,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-27 23:53:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-27 23:53:27,722 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-27 23:53:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:27,755 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-27 23:53:27,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 23:53:27,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-27 23:53:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:27,756 INFO L225 Difference]: With dead ends: 28 [2019-11-27 23:53:27,757 INFO L226 Difference]: Without dead ends: 19 [2019-11-27 23:53:27,757 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 [2019-11-27 23:53:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-27 23:53:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-27 23:53:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-27 23:53:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-27 23:53:27,762 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-27 23:53:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:27,762 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-27 23:53:27,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-27 23:53:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-27 23:53:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-27 23:53:27,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:27,763 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:27,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:27,968 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2019-11-27 23:53:27,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:27,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163850405] [2019-11-27 23:53:27,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:28,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163850405] [2019-11-27 23:53:28,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624259868] [2019-11-27 23:53:28,076 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 [2019-11-27 23:53:28,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-27 23:53:28,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:28,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-27 23:53:28,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:28,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:28,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-27 23:53:28,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429304187] [2019-11-27 23:53:28,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-27 23:53:28,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:28,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-27 23:53:28,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-27 23:53:28,175 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-27 23:53:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:28,218 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-27 23:53:28,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-27 23:53:28,220 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-27 23:53:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:28,221 INFO L225 Difference]: With dead ends: 30 [2019-11-27 23:53:28,221 INFO L226 Difference]: Without dead ends: 21 [2019-11-27 23:53:28,222 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 [2019-11-27 23:53:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-27 23:53:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-27 23:53:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-27 23:53:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-27 23:53:28,230 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-27 23:53:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:28,230 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-27 23:53:28,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-27 23:53:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-27 23:53:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 23:53:28,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:28,232 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:28,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:28,437 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:28,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:28,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2019-11-27 23:53:28,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:28,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702795915] [2019-11-27 23:53:28,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:28,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702795915] [2019-11-27 23:53:28,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233802100] [2019-11-27 23:53:28,545 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 [2019-11-27 23:53:28,601 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-27 23:53:28,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:28,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 23:53:28,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:28,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:28,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-27 23:53:28,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9834003] [2019-11-27 23:53:28,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-27 23:53:28,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-27 23:53:28,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-27 23:53:28,632 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-27 23:53:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:28,673 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-27 23:53:28,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-27 23:53:28,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-27 23:53:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:28,674 INFO L225 Difference]: With dead ends: 32 [2019-11-27 23:53:28,674 INFO L226 Difference]: Without dead ends: 23 [2019-11-27 23:53:28,675 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 [2019-11-27 23:53:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-27 23:53:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-27 23:53:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-27 23:53:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-27 23:53:28,680 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-27 23:53:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:28,680 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-27 23:53:28,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-27 23:53:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-27 23:53:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-27 23:53:28,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:28,681 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:28,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:28,882 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2019-11-27 23:53:28,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:28,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756040672] [2019-11-27 23:53:28,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:28,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756040672] [2019-11-27 23:53:28,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170007773] [2019-11-27 23:53:28,973 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 [2019-11-27 23:53:29,033 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-27 23:53:29,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:29,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-27 23:53:29,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:29,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:29,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-27 23:53:29,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745889275] [2019-11-27 23:53:29,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-27 23:53:29,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:29,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-27 23:53:29,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-27 23:53:29,060 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-27 23:53:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:29,102 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-27 23:53:29,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-27 23:53:29,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-27 23:53:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:29,103 INFO L225 Difference]: With dead ends: 34 [2019-11-27 23:53:29,104 INFO L226 Difference]: Without dead ends: 25 [2019-11-27 23:53:29,104 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 [2019-11-27 23:53:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-27 23:53:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-27 23:53:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-27 23:53:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-27 23:53:29,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-27 23:53:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:29,110 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-27 23:53:29,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-27 23:53:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-27 23:53:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-27 23:53:29,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:29,112 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:29,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:29,317 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2019-11-27 23:53:29,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:29,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582580635] [2019-11-27 23:53:29,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:29,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582580635] [2019-11-27 23:53:29,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893930662] [2019-11-27 23:53:29,428 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 [2019-11-27 23:53:29,544 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-27 23:53:29,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:29,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-27 23:53:29,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:29,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:29,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-27 23:53:29,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533031138] [2019-11-27 23:53:29,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-27 23:53:29,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:29,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-27 23:53:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-27 23:53:29,575 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-27 23:53:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:29,626 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-27 23:53:29,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-27 23:53:29,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-27 23:53:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:29,628 INFO L225 Difference]: With dead ends: 36 [2019-11-27 23:53:29,628 INFO L226 Difference]: Without dead ends: 27 [2019-11-27 23:53:29,628 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 [2019-11-27 23:53:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-27 23:53:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-27 23:53:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-27 23:53:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-27 23:53:29,634 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-27 23:53:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:29,634 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-27 23:53:29,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-27 23:53:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-27 23:53:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-27 23:53:29,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:29,636 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:29,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:29,845 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2019-11-27 23:53:29,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:29,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415877538] [2019-11-27 23:53:29,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:29,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415877538] [2019-11-27 23:53:29,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663767692] [2019-11-27 23:53:29,965 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 [2019-11-27 23:53:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:30,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-27 23:53:30,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:30,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:30,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-27 23:53:30,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413805429] [2019-11-27 23:53:30,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-27 23:53:30,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:30,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-27 23:53:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-27 23:53:30,049 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-27 23:53:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:30,095 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-27 23:53:30,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-27 23:53:30,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-27 23:53:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:30,097 INFO L225 Difference]: With dead ends: 38 [2019-11-27 23:53:30,097 INFO L226 Difference]: Without dead ends: 29 [2019-11-27 23:53:30,098 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 [2019-11-27 23:53:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-27 23:53:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-27 23:53:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-27 23:53:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-27 23:53:30,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-27 23:53:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:30,105 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-27 23:53:30,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-27 23:53:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-27 23:53:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-27 23:53:30,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:30,106 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:30,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:30,310 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:30,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2019-11-27 23:53:30,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:30,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016206572] [2019-11-27 23:53:30,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:30,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016206572] [2019-11-27 23:53:30,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974043087] [2019-11-27 23:53:30,494 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 [2019-11-27 23:53:30,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 23:53:30,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:30,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-27 23:53:30,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:30,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:30,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-27 23:53:30,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006278454] [2019-11-27 23:53:30,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-27 23:53:30,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-27 23:53:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-27 23:53:30,563 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-27 23:53:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:30,603 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-27 23:53:30,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-27 23:53:30,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-27 23:53:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:30,605 INFO L225 Difference]: With dead ends: 40 [2019-11-27 23:53:30,605 INFO L226 Difference]: Without dead ends: 31 [2019-11-27 23:53:30,605 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 [2019-11-27 23:53:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-27 23:53:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-27 23:53:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-27 23:53:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-27 23:53:30,610 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-27 23:53:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:30,610 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-27 23:53:30,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-27 23:53:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-27 23:53:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-27 23:53:30,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:30,611 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:30,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:30,815 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2019-11-27 23:53:30,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:30,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931726334] [2019-11-27 23:53:30,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:30,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931726334] [2019-11-27 23:53:30,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756299405] [2019-11-27 23:53:30,965 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 [2019-11-27 23:53:31,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-27 23:53:31,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:31,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-27 23:53:31,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:31,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:31,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-27 23:53:31,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613890841] [2019-11-27 23:53:31,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-27 23:53:31,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-27 23:53:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-27 23:53:31,316 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-27 23:53:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:31,403 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-27 23:53:31,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-27 23:53:31,404 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-27 23:53:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:31,405 INFO L225 Difference]: With dead ends: 42 [2019-11-27 23:53:31,405 INFO L226 Difference]: Without dead ends: 33 [2019-11-27 23:53:31,407 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 [2019-11-27 23:53:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-27 23:53:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-27 23:53:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-27 23:53:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-27 23:53:31,413 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-27 23:53:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:31,415 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-27 23:53:31,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-27 23:53:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-27 23:53:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-27 23:53:31,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:31,418 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:31,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:31,631 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:31,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2019-11-27 23:53:31,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:31,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266034140] [2019-11-27 23:53:31,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:31,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266034140] [2019-11-27 23:53:31,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282372179] [2019-11-27 23:53:31,827 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 [2019-11-27 23:53:31,878 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-27 23:53:31,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:31,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-27 23:53:31,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:31,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:31,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-27 23:53:31,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224397866] [2019-11-27 23:53:31,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-27 23:53:31,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-27 23:53:31,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-27 23:53:31,904 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-27 23:53:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:31,974 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-27 23:53:31,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-27 23:53:31,975 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-27 23:53:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:31,975 INFO L225 Difference]: With dead ends: 44 [2019-11-27 23:53:31,975 INFO L226 Difference]: Without dead ends: 35 [2019-11-27 23:53:31,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-27 23:53:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-27 23:53:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-27 23:53:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-27 23:53:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-27 23:53:31,986 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-11-27 23:53:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:31,987 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-27 23:53:31,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-27 23:53:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-27 23:53:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-27 23:53:31,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:31,993 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:32,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:32,197 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2019-11-27 23:53:32,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:32,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485752257] [2019-11-27 23:53:32,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:32,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485752257] [2019-11-27 23:53:32,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338269309] [2019-11-27 23:53:32,337 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 [2019-11-27 23:53:32,607 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-27 23:53:32,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:32,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-27 23:53:32,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:32,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:32,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-27 23:53:32,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770003772] [2019-11-27 23:53:32,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-27 23:53:32,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:32,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-27 23:53:32,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-27 23:53:32,626 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-11-27 23:53:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:32,689 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-27 23:53:32,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-27 23:53:32,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-27 23:53:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:32,690 INFO L225 Difference]: With dead ends: 46 [2019-11-27 23:53:32,691 INFO L226 Difference]: Without dead ends: 37 [2019-11-27 23:53:32,691 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 [2019-11-27 23:53:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-27 23:53:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-27 23:53:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-27 23:53:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-27 23:53:32,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2019-11-27 23:53:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:32,697 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-27 23:53:32,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-27 23:53:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-27 23:53:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-27 23:53:32,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:32,698 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:32,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:32,902 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:32,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:32,903 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2019-11-27 23:53:32,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:32,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247829020] [2019-11-27 23:53:32,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:33,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247829020] [2019-11-27 23:53:33,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773645340] [2019-11-27 23:53:33,042 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 [2019-11-27 23:53:33,948 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-27 23:53:33,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:33,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-27 23:53:33,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:33,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:33,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-27 23:53:33,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061149198] [2019-11-27 23:53:33,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-27 23:53:33,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:33,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-27 23:53:33,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-27 23:53:33,993 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2019-11-27 23:53:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:34,047 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-27 23:53:34,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-27 23:53:34,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-27 23:53:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:34,054 INFO L225 Difference]: With dead ends: 48 [2019-11-27 23:53:34,054 INFO L226 Difference]: Without dead ends: 39 [2019-11-27 23:53:34,054 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 [2019-11-27 23:53:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-27 23:53:34,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-27 23:53:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-27 23:53:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-27 23:53:34,063 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2019-11-27 23:53:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:34,065 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-27 23:53:34,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-27 23:53:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-27 23:53:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-27 23:53:34,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:34,067 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:34,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:34,268 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2019-11-27 23:53:34,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:34,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397857590] [2019-11-27 23:53:34,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:34,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397857590] [2019-11-27 23:53:34,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102435994] [2019-11-27 23:53:34,453 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 [2019-11-27 23:53:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:34,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-27 23:53:34,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:34,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:34,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-27 23:53:34,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553143344] [2019-11-27 23:53:34,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-27 23:53:34,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:34,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-27 23:53:34,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-27 23:53:34,573 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-27 23:53:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:34,641 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-27 23:53:34,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-27 23:53:34,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-11-27 23:53:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:34,643 INFO L225 Difference]: With dead ends: 50 [2019-11-27 23:53:34,643 INFO L226 Difference]: Without dead ends: 41 [2019-11-27 23:53:34,644 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 [2019-11-27 23:53:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-27 23:53:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-27 23:53:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-27 23:53:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-27 23:53:34,652 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-11-27 23:53:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:34,653 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-27 23:53:34,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-27 23:53:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-27 23:53:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-27 23:53:34,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:34,657 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:34,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:34,861 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2019-11-27 23:53:34,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:34,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702414230] [2019-11-27 23:53:34,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:35,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702414230] [2019-11-27 23:53:35,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501453866] [2019-11-27 23:53:35,022 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 [2019-11-27 23:53:35,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 23:53:35,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:35,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-27 23:53:35,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:35,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:35,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-27 23:53:35,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925237600] [2019-11-27 23:53:35,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-27 23:53:35,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-27 23:53:35,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-27 23:53:35,102 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2019-11-27 23:53:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:35,181 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-27 23:53:35,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-27 23:53:35,182 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-27 23:53:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:35,182 INFO L225 Difference]: With dead ends: 52 [2019-11-27 23:53:35,182 INFO L226 Difference]: Without dead ends: 43 [2019-11-27 23:53:35,183 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 [2019-11-27 23:53:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-27 23:53:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-27 23:53:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-27 23:53:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-27 23:53:35,187 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2019-11-27 23:53:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:35,187 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-27 23:53:35,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-27 23:53:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-27 23:53:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-27 23:53:35,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:35,188 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:35,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:35,392 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2019-11-27 23:53:35,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:35,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944535292] [2019-11-27 23:53:35,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:35,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944535292] [2019-11-27 23:53:35,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441274190] [2019-11-27 23:53:35,583 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 [2019-11-27 23:53:36,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-27 23:53:36,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:36,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-27 23:53:36,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:36,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:36,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-27 23:53:36,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257242377] [2019-11-27 23:53:36,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-27 23:53:36,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:36,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-27 23:53:36,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-27 23:53:36,846 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2019-11-27 23:53:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:36,921 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-27 23:53:36,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-27 23:53:36,922 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-11-27 23:53:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:36,923 INFO L225 Difference]: With dead ends: 54 [2019-11-27 23:53:36,923 INFO L226 Difference]: Without dead ends: 45 [2019-11-27 23:53:36,924 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 [2019-11-27 23:53:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-27 23:53:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-27 23:53:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-27 23:53:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-27 23:53:36,929 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-11-27 23:53:36,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:36,929 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-27 23:53:36,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-27 23:53:36,929 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-27 23:53:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-27 23:53:36,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:36,930 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:37,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:37,141 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2019-11-27 23:53:37,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:37,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779744762] [2019-11-27 23:53:37,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:37,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779744762] [2019-11-27 23:53:37,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913107596] [2019-11-27 23:53:37,403 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 [2019-11-27 23:53:37,456 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-27 23:53:37,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:37,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-27 23:53:37,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:37,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:37,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-27 23:53:37,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711450797] [2019-11-27 23:53:37,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-27 23:53:37,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:37,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-27 23:53:37,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-27 23:53:37,485 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-11-27 23:53:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:37,571 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-27 23:53:37,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-27 23:53:37,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-11-27 23:53:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:37,572 INFO L225 Difference]: With dead ends: 56 [2019-11-27 23:53:37,572 INFO L226 Difference]: Without dead ends: 47 [2019-11-27 23:53:37,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-27 23:53:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-27 23:53:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-27 23:53:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-27 23:53:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-27 23:53:37,578 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-11-27 23:53:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:37,578 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-27 23:53:37,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-27 23:53:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-27 23:53:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-27 23:53:37,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:37,580 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:37,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:37,790 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:37,791 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2019-11-27 23:53:37,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:37,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673778939] [2019-11-27 23:53:37,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:38,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673778939] [2019-11-27 23:53:38,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758753180] [2019-11-27 23:53:38,019 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 [2019-11-27 23:53:39,075 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-27 23:53:39,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:39,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-27 23:53:39,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:39,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:39,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-27 23:53:39,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530199797] [2019-11-27 23:53:39,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-27 23:53:39,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-27 23:53:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-27 23:53:39,101 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2019-11-27 23:53:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:39,174 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-27 23:53:39,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-27 23:53:39,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-11-27 23:53:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:39,175 INFO L225 Difference]: With dead ends: 58 [2019-11-27 23:53:39,175 INFO L226 Difference]: Without dead ends: 49 [2019-11-27 23:53:39,176 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 [2019-11-27 23:53:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-27 23:53:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-27 23:53:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-27 23:53:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-27 23:53:39,180 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-11-27 23:53:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:39,180 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-27 23:53:39,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-27 23:53:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-27 23:53:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-27 23:53:39,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:39,181 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:39,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:39,387 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2019-11-27 23:53:39,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:39,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512099187] [2019-11-27 23:53:39,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:39,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512099187] [2019-11-27 23:53:39,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476528361] [2019-11-27 23:53:39,599 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 [2019-11-27 23:53:44,975 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-27 23:53:44,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:53:44,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-27 23:53:44,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:45,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:45,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-27 23:53:45,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059189175] [2019-11-27 23:53:45,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-27 23:53:45,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-27 23:53:45,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-27 23:53:45,020 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2019-11-27 23:53:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:45,086 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-27 23:53:45,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-27 23:53:45,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-11-27 23:53:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:45,087 INFO L225 Difference]: With dead ends: 60 [2019-11-27 23:53:45,088 INFO L226 Difference]: Without dead ends: 51 [2019-11-27 23:53:45,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-27 23:53:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-27 23:53:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-27 23:53:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-27 23:53:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-27 23:53:45,092 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2019-11-27 23:53:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:45,092 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-27 23:53:45,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-27 23:53:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-27 23:53:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-27 23:53:45,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:45,093 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:45,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:45,294 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:45,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2019-11-27 23:53:45,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:45,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343749079] [2019-11-27 23:53:45,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:45,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343749079] [2019-11-27 23:53:45,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212669850] [2019-11-27 23:53:45,545 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 [2019-11-27 23:53:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:53:45,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-27 23:53:45,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:53:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:53:45,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:53:45,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-27 23:53:45,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973456214] [2019-11-27 23:53:45,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-27 23:53:45,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:53:45,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-27 23:53:45,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-27 23:53:45,655 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2019-11-27 23:53:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:53:45,729 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-27 23:53:45,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-27 23:53:45,730 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-11-27 23:53:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:53:45,731 INFO L225 Difference]: With dead ends: 61 [2019-11-27 23:53:45,731 INFO L226 Difference]: Without dead ends: 52 [2019-11-27 23:53:45,731 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 [2019-11-27 23:53:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-27 23:53:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-27 23:53:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-27 23:53:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-27 23:53:45,735 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-11-27 23:53:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:53:45,736 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-27 23:53:45,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-27 23:53:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-27 23:53:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-27 23:53:45,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:53:45,736 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:53:45,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:53:45,941 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:53:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:53:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2019-11-27 23:53:45,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:53:45,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675630064] [2019-11-27 23:53:45,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:53:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:53:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:53:46,081 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:53:46,081 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:53:46,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:53:46 BoogieIcfgContainer [2019-11-27 23:53:46,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:53:46,142 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:53:46,142 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:53:46,142 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:53:46,143 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:53:26" (3/4) ... [2019-11-27 23:53:46,145 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:53:46,216 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:53:46,216 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:53:46,222 INFO L168 Benchmark]: Toolchain (without parser) took 20332.51 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 303.6 MB). Free memory was 955.0 MB in the beginning and 1.0 GB in the end (delta: -63.1 MB). Peak memory consumption was 240.4 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:46,223 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:53:46,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -172.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:46,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:53:46,224 INFO L168 Benchmark]: Boogie Preprocessor took 32.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:46,226 INFO L168 Benchmark]: RCFGBuilder took 318.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:46,227 INFO L168 Benchmark]: TraceAbstraction took 19507.31 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 172.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 83.5 MB). Peak memory consumption was 255.4 MB. Max. memory is 11.5 GB. [2019-11-27 23:53:46,227 INFO L168 Benchmark]: Witness Printer took 74.29 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:53:46,229 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 359.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -172.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 318.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19507.31 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 172.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 83.5 MB). Peak memory consumption was 255.4 MB. Max. memory is 11.5 GB. * Witness Printer took 74.29 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. 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: 19.3s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.2s, 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...