./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 22:17:56,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 22:17:56,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 22:17:56,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 22:17:56,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 22:17:56,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 22:17:56,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 22:17:56,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 22:17:56,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 22:17:56,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 22:17:56,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 22:17:56,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 22:17:56,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 22:17:56,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 22:17:56,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 22:17:56,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 22:17:56,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 22:17:56,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 22:17:56,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 22:17:56,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 22:17:56,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 22:17:56,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 22:17:56,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 22:17:56,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 22:17:56,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 22:17:56,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 22:17:56,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 22:17:56,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 22:17:56,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 22:17:56,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 22:17:56,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 22:17:56,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 22:17:56,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 22:17:56,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 22:17:56,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 22:17:56,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 22:17:56,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 22:17:56,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 22:17:56,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 22:17:56,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 22:17:56,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 22:17:56,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 22:17:56,489 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 22:17:56,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 22:17:56,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 22:17:56,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 22:17:56,494 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 22:17:56,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 22:17:56,495 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 22:17:56,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 22:17:56,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 22:17:56,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 22:17:56,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 22:17:56,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 22:17:56,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 22:17:56,498 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 22:17:56,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 22:17:56,499 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 22:17:56,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 22:17:56,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 22:17:56,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 22:17:56,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 22:17:56,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 22:17:56,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 22:17:56,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 22:17:56,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 22:17:56,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 22:17:56,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 22:17:56,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 22:17:56,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 22:17:56,503 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 -> 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 [2019-11-27 22:17:56,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 22:17:56,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 22:17:56,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 22:17:56,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 22:17:56,811 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 22:17:56,812 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-27 22:17:56,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9454331c3/58c6051ff63245f3854fc9fb8ed6720a/FLAGc990394c9 [2019-11-27 22:17:57,313 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 22:17:57,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-27 22:17:57,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9454331c3/58c6051ff63245f3854fc9fb8ed6720a/FLAGc990394c9 [2019-11-27 22:17:57,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9454331c3/58c6051ff63245f3854fc9fb8ed6720a [2019-11-27 22:17:57,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 22:17:57,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 22:17:57,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 22:17:57,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 22:17:57,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 22:17:57,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7c4448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57, skipping insertion in model container [2019-11-27 22:17:57,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 22:17:57,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 22:17:58,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:17:58,015 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 22:17:58,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:17:58,129 INFO L208 MainTranslator]: Completed translation [2019-11-27 22:17:58,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58 WrapperNode [2019-11-27 22:17:58,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 22:17:58,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 22:17:58,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 22:17:58,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 22:17:58,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 22:17:58,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 22:17:58,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 22:17:58,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 22:17:58,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (1/1) ... [2019-11-27 22:17:58,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 22:17:58,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 22:17:58,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 22:17:58,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 22:17:58,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (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 22:17:58,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 22:17:58,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 22:17:58,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 22:17:58,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 22:17:58,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 22:17:58,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 22:17:58,636 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 22:17:58,636 INFO L297 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-27 22:17:58,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:17:58 BoogieIcfgContainer [2019-11-27 22:17:58,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 22:17:58,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 22:17:58,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 22:17:58,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 22:17:58,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 10:17:57" (1/3) ... [2019-11-27 22:17:58,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1fb4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:17:58, skipping insertion in model container [2019-11-27 22:17:58,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:58" (2/3) ... [2019-11-27 22:17:58,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1fb4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:17:58, skipping insertion in model container [2019-11-27 22:17:58,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:17:58" (3/3) ... [2019-11-27 22:17:58,647 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2019-11-27 22:17:58,665 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 22:17:58,685 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 22:17:58,696 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 22:17:58,716 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 22:17:58,717 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 22:17:58,717 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 22:17:58,717 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 22:17:58,717 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 22:17:58,717 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 22:17:58,718 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 22:17:58,718 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 22:17:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-27 22:17:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-27 22:17:58,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:58,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:17:58,739 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-11-27 22:17:58,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:58,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428876752] [2019-11-27 22:17:58,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:58,874 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 22:17:58,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428876752] [2019-11-27 22:17:58,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:58,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 22:17:58,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407834233] [2019-11-27 22:17:58,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 22:17:58,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 22:17:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 22:17:58,899 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-27 22:17:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:58,918 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-11-27 22:17:58,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 22:17:58,919 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-27 22:17:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:58,929 INFO L225 Difference]: With dead ends: 56 [2019-11-27 22:17:58,929 INFO L226 Difference]: Without dead ends: 26 [2019-11-27 22:17:58,933 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 22:17:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-27 22:17:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-27 22:17:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-27 22:17:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-27 22:17:58,963 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-11-27 22:17:58,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:58,964 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-27 22:17:58,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 22:17:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-27 22:17:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-27 22:17:58,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:58,965 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:17:58,965 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-11-27 22:17:58,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:58,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533541891] [2019-11-27 22:17:58,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:58,982 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:17:58,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903497403] [2019-11-27 22:17:58,983 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 22:17:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:59,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-27 22:17:59,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:17:59,113 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 22:17:59,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533541891] [2019-11-27 22:17:59,114 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:17:59,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903497403] [2019-11-27 22:17:59,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:59,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:17:59,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033585644] [2019-11-27 22:17:59,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:17:59,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:59,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:17:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:17:59,119 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-11-27 22:17:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:59,146 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-27 22:17:59,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:17:59,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-27 22:17:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:59,149 INFO L225 Difference]: With dead ends: 50 [2019-11-27 22:17:59,151 INFO L226 Difference]: Without dead ends: 28 [2019-11-27 22:17:59,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 22:17:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-27 22:17:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-27 22:17:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-27 22:17:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-27 22:17:59,163 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-27 22:17:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:59,163 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-27 22:17:59,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:17:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-27 22:17:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 22:17:59,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:59,166 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:17:59,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:17:59,371 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-11-27 22:17:59,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:59,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988759530] [2019-11-27 22:17:59,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:59,397 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:17:59,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518802290] [2019-11-27 22:17:59,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:17:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:59,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-27 22:17:59,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:17:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-27 22:17:59,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988759530] [2019-11-27 22:17:59,485 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:17:59,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518802290] [2019-11-27 22:17:59,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:59,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:17:59,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700491012] [2019-11-27 22:17:59,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:17:59,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:59,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:17:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:17:59,488 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-27 22:17:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:59,554 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-11-27 22:17:59,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:17:59,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-27 22:17:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:59,556 INFO L225 Difference]: With dead ends: 57 [2019-11-27 22:17:59,556 INFO L226 Difference]: Without dead ends: 36 [2019-11-27 22:17:59,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 22:17:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-27 22:17:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-27 22:17:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-27 22:17:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-27 22:17:59,564 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-11-27 22:17:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:59,564 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-27 22:17:59,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:17:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-27 22:17:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-27 22:17:59,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:59,566 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:17:59,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:17:59,770 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:59,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-11-27 22:17:59,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:59,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424765884] [2019-11-27 22:17:59,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:59,786 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:17:59,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606156512] [2019-11-27 22:17:59,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:17:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:59,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:17:59,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:17:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-27 22:17:59,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424765884] [2019-11-27 22:17:59,877 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:17:59,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606156512] [2019-11-27 22:17:59,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:59,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:17:59,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492374450] [2019-11-27 22:17:59,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:17:59,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:59,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:17:59,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:17:59,882 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-11-27 22:17:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:59,975 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-11-27 22:17:59,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:17:59,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-27 22:17:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:59,977 INFO L225 Difference]: With dead ends: 75 [2019-11-27 22:17:59,978 INFO L226 Difference]: Without dead ends: 54 [2019-11-27 22:17:59,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 22:17:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-27 22:17:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-27 22:17:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-27 22:17:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-27 22:17:59,986 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-11-27 22:17:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:59,987 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-27 22:17:59,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:17:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-27 22:17:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-27 22:17:59,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:59,989 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:00,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:00,204 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:00,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-11-27 22:18:00,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:00,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829526614] [2019-11-27 22:18:00,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:18:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-27 22:18:00,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829526614] [2019-11-27 22:18:00,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:18:00,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 22:18:00,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370091758] [2019-11-27 22:18:00,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:18:00,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:00,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:18:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:00,277 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-11-27 22:18:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:00,378 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-11-27 22:18:00,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:18:00,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-27 22:18:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:00,381 INFO L225 Difference]: With dead ends: 85 [2019-11-27 22:18:00,381 INFO L226 Difference]: Without dead ends: 54 [2019-11-27 22:18:00,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-27 22:18:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-27 22:18:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-27 22:18:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-27 22:18:00,399 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-11-27 22:18:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:00,399 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-27 22:18:00,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:18:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-27 22:18:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-27 22:18:00,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:00,402 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:00,402 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-11-27 22:18:00,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:00,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369223502] [2019-11-27 22:18:00,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:00,434 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:00,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767805210] [2019-11-27 22:18:00,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:18:00,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-27 22:18:00,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-27 22:18:00,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369223502] [2019-11-27 22:18:00,529 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:00,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767805210] [2019-11-27 22:18:00,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:18:00,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:18:00,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042908824] [2019-11-27 22:18:00,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:18:00,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:18:00,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:18:00,539 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-27 22:18:00,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:00,558 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-27 22:18:00,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:18:00,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-27 22:18:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:00,562 INFO L225 Difference]: With dead ends: 54 [2019-11-27 22:18:00,562 INFO L226 Difference]: Without dead ends: 41 [2019-11-27 22:18:00,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 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 22:18:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-27 22:18:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-27 22:18:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-27 22:18:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-27 22:18:00,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-11-27 22:18:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:00,578 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-27 22:18:00,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:18:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-27 22:18:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-27 22:18:00,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:00,581 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:00,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:00,784 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-11-27 22:18:00,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:00,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46614853] [2019-11-27 22:18:00,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:00,800 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:00,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077411576] [2019-11-27 22:18:00,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:18:00,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:18:00,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-27 22:18:00,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46614853] [2019-11-27 22:18:00,889 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:00,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077411576] [2019-11-27 22:18:00,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:00,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-27 22:18:00,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8494200] [2019-11-27 22:18:00,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:18:00,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:00,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:18:00,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:00,892 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-11-27 22:18:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:00,915 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-27 22:18:00,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:18:00,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-27 22:18:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:00,918 INFO L225 Difference]: With dead ends: 78 [2019-11-27 22:18:00,918 INFO L226 Difference]: Without dead ends: 43 [2019-11-27 22:18:00,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-27 22:18:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-27 22:18:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-27 22:18:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-27 22:18:00,925 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-11-27 22:18:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:00,926 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-27 22:18:00,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:18:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-27 22:18:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-27 22:18:00,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:00,930 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:01,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:01,135 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-11-27 22:18:01,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:01,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657756821] [2019-11-27 22:18:01,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:01,152 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:01,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186334471] [2019-11-27 22:18:01,153 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 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 22:18:01,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 22:18:01,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:01,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:18:01,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-27 22:18:01,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657756821] [2019-11-27 22:18:01,247 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:01,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186334471] [2019-11-27 22:18:01,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:01,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-27 22:18:01,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331287332] [2019-11-27 22:18:01,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:18:01,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:18:01,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:01,250 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-11-27 22:18:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:01,309 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-27 22:18:01,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:18:01,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-27 22:18:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:01,311 INFO L225 Difference]: With dead ends: 86 [2019-11-27 22:18:01,311 INFO L226 Difference]: Without dead ends: 54 [2019-11-27 22:18:01,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-27 22:18:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-27 22:18:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-27 22:18:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-27 22:18:01,319 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-11-27 22:18:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:01,319 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-27 22:18:01,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:18:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-27 22:18:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-27 22:18:01,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:01,322 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:01,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:01,527 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:01,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-11-27 22:18:01,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:01,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10120147] [2019-11-27 22:18:01,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:01,556 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:01,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440942796] [2019-11-27 22:18:01,561 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 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 22:18:01,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-27 22:18:01,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:01,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:18:01,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-27 22:18:01,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10120147] [2019-11-27 22:18:01,658 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:01,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440942796] [2019-11-27 22:18:01,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:01,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-27 22:18:01,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886758707] [2019-11-27 22:18:01,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:18:01,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:18:01,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:01,663 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-11-27 22:18:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:01,685 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-11-27 22:18:01,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:18:01,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-27 22:18:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:01,688 INFO L225 Difference]: With dead ends: 70 [2019-11-27 22:18:01,688 INFO L226 Difference]: Without dead ends: 54 [2019-11-27 22:18:01,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-27 22:18:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-27 22:18:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-27 22:18:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-11-27 22:18:01,699 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-11-27 22:18:01,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:01,700 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-11-27 22:18:01,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:18:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-11-27 22:18:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-27 22:18:01,701 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:01,701 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:01,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:01,906 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:01,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-11-27 22:18:01,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:01,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073655974] [2019-11-27 22:18:01,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:01,922 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:01,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218068084] [2019-11-27 22:18:01,923 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 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 22:18:01,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-27 22:18:01,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:01,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-27 22:18:01,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-27 22:18:02,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073655974] [2019-11-27 22:18:02,047 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:02,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218068084] [2019-11-27 22:18:02,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:02,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-27 22:18:02,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896833736] [2019-11-27 22:18:02,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 22:18:02,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:02,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 22:18:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-27 22:18:02,050 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-11-27 22:18:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:02,117 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2019-11-27 22:18:02,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 22:18:02,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-27 22:18:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:02,118 INFO L225 Difference]: With dead ends: 102 [2019-11-27 22:18:02,118 INFO L226 Difference]: Without dead ends: 62 [2019-11-27 22:18:02,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 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 22:18:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-27 22:18:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-27 22:18:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-27 22:18:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-11-27 22:18:02,126 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2019-11-27 22:18:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:02,126 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-11-27 22:18:02,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 22:18:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-11-27 22:18:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-27 22:18:02,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:02,127 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:02,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:02,329 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2133276057, now seen corresponding path program 5 times [2019-11-27 22:18:02,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:02,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443405229] [2019-11-27 22:18:02,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:02,344 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:02,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807576618] [2019-11-27 22:18:02,344 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 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 22:18:02,410 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-27 22:18:02,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:02,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:18:02,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-27 22:18:02,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443405229] [2019-11-27 22:18:02,432 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:02,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807576618] [2019-11-27 22:18:02,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:18:02,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 22:18:02,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968795646] [2019-11-27 22:18:02,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:18:02,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:02,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:18:02,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:02,435 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2019-11-27 22:18:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:02,478 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2019-11-27 22:18:02,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:18:02,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-11-27 22:18:02,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:02,482 INFO L225 Difference]: With dead ends: 111 [2019-11-27 22:18:02,482 INFO L226 Difference]: Without dead ends: 71 [2019-11-27 22:18:02,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-27 22:18:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-11-27 22:18:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-27 22:18:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-11-27 22:18:02,493 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 61 [2019-11-27 22:18:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:02,493 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-11-27 22:18:02,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:18:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-11-27 22:18:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-27 22:18:02,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:02,495 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:02,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:02,700 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2021142629, now seen corresponding path program 1 times [2019-11-27 22:18:02,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:02,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775305939] [2019-11-27 22:18:02,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:02,719 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:02,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709703765] [2019-11-27 22:18:02,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:18:02,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-27 22:18:02,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-27 22:18:02,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775305939] [2019-11-27 22:18:02,831 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:02,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709703765] [2019-11-27 22:18:02,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:02,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-27 22:18:02,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218338686] [2019-11-27 22:18:02,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 22:18:02,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 22:18:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-27 22:18:02,833 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 5 states. [2019-11-27 22:18:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:02,852 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2019-11-27 22:18:02,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 22:18:02,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-27 22:18:02,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:02,854 INFO L225 Difference]: With dead ends: 120 [2019-11-27 22:18:02,854 INFO L226 Difference]: Without dead ends: 65 [2019-11-27 22:18:02,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 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 22:18:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-27 22:18:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-27 22:18:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-27 22:18:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-27 22:18:02,860 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2019-11-27 22:18:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:02,861 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-27 22:18:02,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 22:18:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-27 22:18:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-27 22:18:02,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:02,862 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:03,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:03,066 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:03,067 INFO L82 PathProgramCache]: Analyzing trace with hash 265673379, now seen corresponding path program 2 times [2019-11-27 22:18:03,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:03,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151769397] [2019-11-27 22:18:03,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:03,081 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:03,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712144147] [2019-11-27 22:18:03,082 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 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 22:18:03,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 22:18:03,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:03,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-27 22:18:03,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-27 22:18:03,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151769397] [2019-11-27 22:18:03,191 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:03,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712144147] [2019-11-27 22:18:03,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:03,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-27 22:18:03,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117968903] [2019-11-27 22:18:03,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-27 22:18:03,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-27 22:18:03,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-27 22:18:03,194 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 6 states. [2019-11-27 22:18:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:03,212 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-11-27 22:18:03,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-27 22:18:03,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2019-11-27 22:18:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:03,213 INFO L225 Difference]: With dead ends: 122 [2019-11-27 22:18:03,213 INFO L226 Difference]: Without dead ends: 67 [2019-11-27 22:18:03,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-27 22:18:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-27 22:18:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-27 22:18:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-27 22:18:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2019-11-27 22:18:03,219 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2019-11-27 22:18:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:03,219 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2019-11-27 22:18:03,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-27 22:18:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2019-11-27 22:18:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-27 22:18:03,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:03,220 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:03,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:03,424 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1181871457, now seen corresponding path program 3 times [2019-11-27 22:18:03,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:03,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204991665] [2019-11-27 22:18:03,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:03,437 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:03,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428332657] [2019-11-27 22:18:03,438 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 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 22:18:03,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-27 22:18:03,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:03,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-27 22:18:03,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-27 22:18:03,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204991665] [2019-11-27 22:18:03,548 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:03,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428332657] [2019-11-27 22:18:03,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:03,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-27 22:18:03,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350129019] [2019-11-27 22:18:03,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 22:18:03,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:03,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 22:18:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-27 22:18:03,551 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2019-11-27 22:18:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:03,569 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2019-11-27 22:18:03,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 22:18:03,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-11-27 22:18:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:03,572 INFO L225 Difference]: With dead ends: 88 [2019-11-27 22:18:03,572 INFO L226 Difference]: Without dead ends: 69 [2019-11-27 22:18:03,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 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 22:18:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-27 22:18:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-27 22:18:03,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-27 22:18:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-27 22:18:03,578 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 65 [2019-11-27 22:18:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:03,578 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-27 22:18:03,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 22:18:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-27 22:18:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-27 22:18:03,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:03,579 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:03,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:03,784 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1302328097, now seen corresponding path program 4 times [2019-11-27 22:18:03,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:03,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339582525] [2019-11-27 22:18:03,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:03,797 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:03,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629018426] [2019-11-27 22:18:03,798 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 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 22:18:03,851 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-27 22:18:03,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:03,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 22:18:03,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-27 22:18:03,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339582525] [2019-11-27 22:18:03,895 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:03,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629018426] [2019-11-27 22:18:03,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:03,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-27 22:18:03,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390568991] [2019-11-27 22:18:03,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-27 22:18:03,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:03,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-27 22:18:03,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-27 22:18:03,899 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 7 states. [2019-11-27 22:18:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:03,990 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-11-27 22:18:03,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-27 22:18:03,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-11-27 22:18:03,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:03,991 INFO L225 Difference]: With dead ends: 120 [2019-11-27 22:18:03,991 INFO L226 Difference]: Without dead ends: 77 [2019-11-27 22:18:03,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-27 22:18:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-27 22:18:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-27 22:18:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-27 22:18:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-27 22:18:03,997 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 67 [2019-11-27 22:18:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:03,997 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-27 22:18:03,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-27 22:18:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-27 22:18:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-27 22:18:03,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:03,998 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:04,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:04,202 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -153484414, now seen corresponding path program 5 times [2019-11-27 22:18:04,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:04,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867109541] [2019-11-27 22:18:04,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:04,216 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:04,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708480733] [2019-11-27 22:18:04,217 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 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 22:18:04,307 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-27 22:18:04,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:04,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 22:18:04,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-27 22:18:04,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867109541] [2019-11-27 22:18:04,351 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:04,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708480733] [2019-11-27 22:18:04,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:04,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-27 22:18:04,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817986575] [2019-11-27 22:18:04,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-27 22:18:04,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-27 22:18:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-27 22:18:04,353 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 7 states. [2019-11-27 22:18:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:04,379 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2019-11-27 22:18:04,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-27 22:18:04,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2019-11-27 22:18:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:04,380 INFO L225 Difference]: With dead ends: 145 [2019-11-27 22:18:04,380 INFO L226 Difference]: Without dead ends: 79 [2019-11-27 22:18:04,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-27 22:18:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-27 22:18:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-27 22:18:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-27 22:18:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-11-27 22:18:04,388 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2019-11-27 22:18:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:04,390 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-11-27 22:18:04,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-27 22:18:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-11-27 22:18:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-27 22:18:04,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:04,391 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:04,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:04,595 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:04,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 6 times [2019-11-27 22:18:04,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:04,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195924466] [2019-11-27 22:18:04,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:04,610 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:04,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043376051] [2019-11-27 22:18:04,611 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 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 22:18:24,566 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-27 22:18:24,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:24,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-27 22:18:24,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-27 22:18:24,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195924466] [2019-11-27 22:18:24,620 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:24,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043376051] [2019-11-27 22:18:24,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:24,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-27 22:18:24,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571859718] [2019-11-27 22:18:24,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-27 22:18:24,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:24,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-27 22:18:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-27 22:18:24,622 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2019-11-27 22:18:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:24,642 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2019-11-27 22:18:24,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-27 22:18:24,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-11-27 22:18:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:24,643 INFO L225 Difference]: With dead ends: 103 [2019-11-27 22:18:24,643 INFO L226 Difference]: Without dead ends: 81 [2019-11-27 22:18:24,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-27 22:18:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-27 22:18:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-27 22:18:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-27 22:18:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2019-11-27 22:18:24,648 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2019-11-27 22:18:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:24,648 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2019-11-27 22:18:24,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-27 22:18:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2019-11-27 22:18:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-27 22:18:24,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:24,650 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:24,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:24,854 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 7 times [2019-11-27 22:18:24,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:24,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810169974] [2019-11-27 22:18:24,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:24,870 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:24,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596729817] [2019-11-27 22:18:24,870 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 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 22:18:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:18:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:18:25,295 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 22:18:25,295 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 22:18:25,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:25,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 10:18:25 BoogieIcfgContainer [2019-11-27 22:18:25,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 22:18:25,582 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 22:18:25,582 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 22:18:25,582 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 22:18:25,583 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:17:58" (3/4) ... [2019-11-27 22:18:25,585 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 22:18:25,664 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 22:18:25,664 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 22:18:25,667 INFO L168 Benchmark]: Toolchain (without parser) took 27939.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.2 MB). Free memory was 961.7 MB in the beginning and 954.9 MB in the end (delta: 6.8 MB). Peak memory consumption was 216.0 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:25,667 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 22:18:25,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -181.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:25,668 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:25,668 INFO L168 Benchmark]: Boogie Preprocessor took 41.79 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 22:18:25,669 INFO L168 Benchmark]: RCFGBuilder took 416.47 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: 26.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:25,669 INFO L168 Benchmark]: TraceAbstraction took 26941.84 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 62.9 MB). Free memory was 1.1 GB in the beginning and 961.8 MB in the end (delta: 147.8 MB). Peak memory consumption was 210.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:25,670 INFO L168 Benchmark]: Witness Printer took 82.92 ms. Allocated memory is still 1.2 GB. Free memory was 961.8 MB in the beginning and 954.9 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:25,672 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 397.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -181.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 48.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 41.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 416.47 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: 26.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26941.84 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 62.9 MB). Free memory was 1.1 GB in the beginning and 961.8 MB in the end (delta: 147.8 MB). Peak memory consumption was 210.7 MB. Max. memory is 11.5 GB. * Witness Printer took 82.92 ms. Allocated memory is still 1.2 GB. Free memory was 961.8 MB in the beginning and 954.9 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; [L5] int i; [L6] i = 0 [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND FALSE !(i < 5) [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND FALSE !(i<5 -1) [L46] x[5 -1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Result: UNSAFE, OverallTime: 26.7s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 187 SDslu, 565 SDs, 0 SdLazy, 304 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=17, 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, 17 MinimizatonAttempts, 46 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 20.5s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 879 NumberOfCodeBlocks, 816 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 52874 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2308 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 745/820 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...