./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum.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/rangesum.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 279fae57395782089eff32ec1396d1726d808c7f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:17:55,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 22:17:55,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 22:17:55,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 22:17:55,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 22:17:55,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 22:17:55,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 22:17:55,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 22:17:55,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 22:17:55,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 22:17:55,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 22:17:55,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 22:17:55,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 22:17:55,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 22:17:55,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 22:17:55,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 22:17:55,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 22:17:55,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 22:17:55,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 22:17:55,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 22:17:55,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 22:17:55,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 22:17:55,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 22:17:55,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 22:17:55,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 22:17:55,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 22:17:55,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 22:17:55,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 22:17:55,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 22:17:55,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 22:17:55,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 22:17:55,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 22:17:55,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 22:17:55,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 22:17:55,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 22:17:55,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 22:17:55,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 22:17:55,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 22:17:55,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 22:17:55,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 22:17:55,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 22:17:55,542 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 22:17:55,565 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 22:17:55,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 22:17:55,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 22:17:55,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 22:17:55,567 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 22:17:55,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 22:17:55,568 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 22:17:55,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 22:17:55,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 22:17:55,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 22:17:55,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 22:17:55,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 22:17:55,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 22:17:55,571 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 22:17:55,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 22:17:55,571 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 22:17:55,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 22:17:55,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 22:17:55,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 22:17:55,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 22:17:55,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 22:17:55,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 22:17:55,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 22:17:55,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 22:17:55,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 22:17:55,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 22:17:55,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 22:17:55,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 22:17:55,575 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 -> 279fae57395782089eff32ec1396d1726d808c7f [2019-11-27 22:17:55,856 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 22:17:55,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 22:17:55,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 22:17:55,874 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 22:17:55,874 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 22:17:55,875 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-27 22:17:55,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407c8c52f/dea9841936334d2891b0abfd91fa9ef6/FLAG4137dfc5d [2019-11-27 22:17:56,370 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 22:17:56,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-27 22:17:56,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407c8c52f/dea9841936334d2891b0abfd91fa9ef6/FLAG4137dfc5d [2019-11-27 22:17:56,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407c8c52f/dea9841936334d2891b0abfd91fa9ef6 [2019-11-27 22:17:56,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 22:17:56,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 22:17:56,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 22:17:56,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 22:17:56,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 22:17:56,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:17:56" (1/1) ... [2019-11-27 22:17:56,763 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 10:17:56, skipping insertion in model container [2019-11-27 22:17:56,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:17:56" (1/1) ... [2019-11-27 22:17:56,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 22:17:56,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 22:17:56,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:17:56,997 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 22:17:57,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:17:57,092 INFO L208 MainTranslator]: Completed translation [2019-11-27 22:17:57,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57 WrapperNode [2019-11-27 22:17:57,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 22:17:57,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 22:17:57,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 22:17:57,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 22:17:57,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 22:17:57,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 22:17:57,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 22:17:57,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 22:17:57,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (1/1) ... [2019-11-27 22:17:57,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 22:17:57,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 22:17:57,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 22:17:57,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 22:17:57,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (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 22:17:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 22:17:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 22:17:57,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 22:17:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 22:17:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 22:17:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 22:17:57,653 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 22:17:57,653 INFO L297 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-27 22:17:57,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:17:57 BoogieIcfgContainer [2019-11-27 22:17:57,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 22:17:57,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 22:17:57,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 22:17:57,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 22:17:57,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 10:17:56" (1/3) ... [2019-11-27 22:17:57,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361e9777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:17:57, skipping insertion in model container [2019-11-27 22:17:57,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:17:57" (2/3) ... [2019-11-27 22:17:57,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361e9777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:17:57, skipping insertion in model container [2019-11-27 22:17:57,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:17:57" (3/3) ... [2019-11-27 22:17:57,662 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2019-11-27 22:17:57,671 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 22:17:57,678 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 22:17:57,690 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 22:17:57,714 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 22:17:57,714 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 22:17:57,714 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 22:17:57,715 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 22:17:57,715 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 22:17:57,715 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 22:17:57,715 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 22:17:57,715 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 22:17:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-27 22:17:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-27 22:17:57,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:57,737 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:17:57,737 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:57,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2019-11-27 22:17:57,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:57,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678377410] [2019-11-27 22:17:57,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:57,864 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 22:17:57,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678377410] [2019-11-27 22:17:57,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:57,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 22:17:57,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662623183] [2019-11-27 22:17:57,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 22:17:57,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 22:17:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 22:17:57,882 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-27 22:17:57,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:57,899 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2019-11-27 22:17:57,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 22:17:57,900 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-11-27 22:17:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:57,910 INFO L225 Difference]: With dead ends: 59 [2019-11-27 22:17:57,910 INFO L226 Difference]: Without dead ends: 27 [2019-11-27 22:17:57,913 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 22:17:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-27 22:17:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-27 22:17:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-27 22:17:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-27 22:17:57,948 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2019-11-27 22:17:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:57,948 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-27 22:17:57,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 22:17:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-27 22:17:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-27 22:17:57,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:57,950 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:17:57,950 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:57,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:57,950 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2019-11-27 22:17:57,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:57,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541187405] [2019-11-27 22:17:57,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:57,968 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:17:57,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952170574] [2019-11-27 22:17:57,969 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 22:17:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:58,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:17:58,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:17:58,090 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 22:17:58,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541187405] [2019-11-27 22:17:58,092 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:17:58,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952170574] [2019-11-27 22:17:58,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:58,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:17:58,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424765884] [2019-11-27 22:17:58,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:17:58,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:58,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:17:58,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:17:58,096 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-27 22:17:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:58,175 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2019-11-27 22:17:58,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:17:58,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-27 22:17:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:58,177 INFO L225 Difference]: With dead ends: 65 [2019-11-27 22:17:58,177 INFO L226 Difference]: Without dead ends: 48 [2019-11-27 22:17:58,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 22:17:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-27 22:17:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-11-27 22:17:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-27 22:17:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2019-11-27 22:17:58,186 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2019-11-27 22:17:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:58,187 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2019-11-27 22:17:58,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:17:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2019-11-27 22:17:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-27 22:17:58,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:58,188 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:17:58,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:17:58,399 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:58,400 INFO L82 PathProgramCache]: Analyzing trace with hash 840584081, now seen corresponding path program 1 times [2019-11-27 22:17:58,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:58,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23812407] [2019-11-27 22:17:58,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:58,581 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 22:17:58,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23812407] [2019-11-27 22:17:58,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:58,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-27 22:17:58,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064708665] [2019-11-27 22:17:58,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-27 22:17:58,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:58,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-27 22:17:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-27 22:17:58,586 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 8 states. [2019-11-27 22:17:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:58,676 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2019-11-27 22:17:58,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-27 22:17:58,677 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-27 22:17:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:58,679 INFO L225 Difference]: With dead ends: 96 [2019-11-27 22:17:58,679 INFO L226 Difference]: Without dead ends: 91 [2019-11-27 22:17:58,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-27 22:17:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-27 22:17:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2019-11-27 22:17:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-27 22:17:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-11-27 22:17:58,693 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 18 [2019-11-27 22:17:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:58,694 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-11-27 22:17:58,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-27 22:17:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-11-27 22:17:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-27 22:17:58,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:58,696 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] [2019-11-27 22:17:58,696 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash -995174774, now seen corresponding path program 1 times [2019-11-27 22:17:58,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:58,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806871052] [2019-11-27 22:17:58,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:58,725 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:17:58,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529163808] [2019-11-27 22:17:58,727 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 22:17:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:58,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:17:58,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:17:58,825 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 22:17:58,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806871052] [2019-11-27 22:17:58,827 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:17:58,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529163808] [2019-11-27 22:17:58,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:58,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:17:58,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8494200] [2019-11-27 22:17:58,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:17:58,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:58,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:17:58,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:17:58,831 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 3 states. [2019-11-27 22:17:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:58,904 INFO L93 Difference]: Finished difference Result 115 states and 165 transitions. [2019-11-27 22:17:58,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:17:58,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-27 22:17:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:58,908 INFO L225 Difference]: With dead ends: 115 [2019-11-27 22:17:58,908 INFO L226 Difference]: Without dead ends: 61 [2019-11-27 22:17:58,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 22:17:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-27 22:17:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-27 22:17:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-27 22:17:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2019-11-27 22:17:58,933 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 21 [2019-11-27 22:17:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:58,934 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2019-11-27 22:17:58,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:17:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2019-11-27 22:17:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-27 22:17:58,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:58,936 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] [2019-11-27 22:17:59,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:17:59,140 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2100366548, now seen corresponding path program 1 times [2019-11-27 22:17:59,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:59,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563629340] [2019-11-27 22:17:59,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:59,179 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:17:59,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397398508] [2019-11-27 22:17:59,180 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 22:17:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:17:59,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-27 22:17:59,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:17:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-27 22:17:59,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563629340] [2019-11-27 22:17:59,275 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:17:59,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397398508] [2019-11-27 22:17:59,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:17:59,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-27 22:17:59,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384529193] [2019-11-27 22:17:59,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:17:59,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:17:59,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:17:59,277 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand 4 states. [2019-11-27 22:17:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:59,345 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2019-11-27 22:17:59,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:17:59,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-27 22:17:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:59,346 INFO L225 Difference]: With dead ends: 117 [2019-11-27 22:17:59,347 INFO L226 Difference]: Without dead ends: 63 [2019-11-27 22:17:59,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 22:17:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-27 22:17:59,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-27 22:17:59,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-27 22:17:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2019-11-27 22:17:59,355 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 23 [2019-11-27 22:17:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:59,356 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2019-11-27 22:17:59,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:17:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2019-11-27 22:17:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-27 22:17:59,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:59,357 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:17:59,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:17:59,566 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:17:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:17:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash 962228046, now seen corresponding path program 2 times [2019-11-27 22:17:59,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:17:59,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974887521] [2019-11-27 22:17:59,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:17:59,597 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:17:59,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3481835] [2019-11-27 22:17:59,598 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 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 22:17:59,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-27 22:17:59,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:17:59,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:17:59,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:17:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-27 22:17:59,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974887521] [2019-11-27 22:17:59,690 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:17:59,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3481835] [2019-11-27 22:17:59,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:17:59,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 22:17:59,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206069186] [2019-11-27 22:17:59,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:17:59,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:17:59,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:17:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:17:59,698 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 4 states. [2019-11-27 22:17:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:17:59,810 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2019-11-27 22:17:59,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:17:59,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-27 22:17:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:17:59,812 INFO L225 Difference]: With dead ends: 127 [2019-11-27 22:17:59,812 INFO L226 Difference]: Without dead ends: 77 [2019-11-27 22:17:59,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 22:17:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-27 22:17:59,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2019-11-27 22:17:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-27 22:17:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2019-11-27 22:17:59,829 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 25 [2019-11-27 22:17:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:17:59,831 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2019-11-27 22:17:59,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:17:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2019-11-27 22:17:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-27 22:17:59,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:17:59,833 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-27 22:18:00,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:00,034 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1979262774, now seen corresponding path program 1 times [2019-11-27 22:18:00,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:00,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595598359] [2019-11-27 22:18:00,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:00,070 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:00,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123128277] [2019-11-27 22:18:00,070 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 22:18:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:18:00,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-27 22:18:00,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-27 22:18:00,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595598359] [2019-11-27 22:18:00,177 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:00,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123128277] [2019-11-27 22:18:00,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:00,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-27 22:18:00,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333469938] [2019-11-27 22:18:00,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 22:18:00,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:00,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 22:18:00,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-27 22:18:00,180 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 5 states. [2019-11-27 22:18:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:00,276 INFO L93 Difference]: Finished difference Result 150 states and 206 transitions. [2019-11-27 22:18:00,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 22:18:00,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-11-27 22:18:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:00,278 INFO L225 Difference]: With dead ends: 150 [2019-11-27 22:18:00,278 INFO L226 Difference]: Without dead ends: 92 [2019-11-27 22:18:00,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 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 22:18:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-27 22:18:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-27 22:18:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-27 22:18:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2019-11-27 22:18:00,289 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 34 [2019-11-27 22:18:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:00,289 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2019-11-27 22:18:00,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 22:18:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2019-11-27 22:18:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-27 22:18:00,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:00,291 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2019-11-27 22:18:00,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:00,505 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:00,505 INFO L82 PathProgramCache]: Analyzing trace with hash -387145522, now seen corresponding path program 2 times [2019-11-27 22:18:00,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:00,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623047443] [2019-11-27 22:18:00,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:00,536 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:00,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270024422] [2019-11-27 22:18:00,537 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 22:18:00,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-27 22:18:00,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:00,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:18:00,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-27 22:18:00,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623047443] [2019-11-27 22:18:00,613 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:00,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270024422] [2019-11-27 22:18:00,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:18:00,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 22:18:00,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954887167] [2019-11-27 22:18:00,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:18:00,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:00,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:18:00,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:18:00,616 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 4 states. [2019-11-27 22:18:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:00,674 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2019-11-27 22:18:00,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:18:00,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-27 22:18:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:00,677 INFO L225 Difference]: With dead ends: 122 [2019-11-27 22:18:00,677 INFO L226 Difference]: Without dead ends: 91 [2019-11-27 22:18:00,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 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 22:18:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-27 22:18:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-27 22:18:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-27 22:18:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2019-11-27 22:18:00,702 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 43 [2019-11-27 22:18:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:00,702 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2019-11-27 22:18:00,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:18:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2019-11-27 22:18:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-27 22:18:00,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:00,708 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2019-11-27 22:18:00,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:00,909 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 1 times [2019-11-27 22:18:00,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:00,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910301170] [2019-11-27 22:18:00,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:00,935 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:00,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878378979] [2019-11-27 22:18:00,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:18:01,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-27 22:18:01,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-27 22:18:01,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910301170] [2019-11-27 22:18:01,085 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:01,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878378979] [2019-11-27 22:18:01,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:01,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-27 22:18:01,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717581991] [2019-11-27 22:18:01,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-27 22:18:01,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-27 22:18:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-27 22:18:01,088 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 9 states. [2019-11-27 22:18:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:01,280 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2019-11-27 22:18:01,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-27 22:18:01,280 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-11-27 22:18:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:01,282 INFO L225 Difference]: With dead ends: 197 [2019-11-27 22:18:01,282 INFO L226 Difference]: Without dead ends: 92 [2019-11-27 22:18:01,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-27 22:18:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-27 22:18:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-27 22:18:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-27 22:18:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2019-11-27 22:18:01,303 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 45 [2019-11-27 22:18:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:01,305 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2019-11-27 22:18:01,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-27 22:18:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2019-11-27 22:18:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-27 22:18:01,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:01,312 INFO L410 BasicCegarLoop]: trace histogram [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, 1] [2019-11-27 22:18:01,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:01,513 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash -3446958, now seen corresponding path program 2 times [2019-11-27 22:18:01,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:01,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570041441] [2019-11-27 22:18:01,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:01,533 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:01,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710790385] [2019-11-27 22:18:01,534 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:01,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 22:18:01,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:01,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-27 22:18:01,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-27 22:18:01,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570041441] [2019-11-27 22:18:01,718 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:01,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710790385] [2019-11-27 22:18:01,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:01,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-27 22:18:01,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972995066] [2019-11-27 22:18:01,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-27 22:18:01,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-27 22:18:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-27 22:18:01,721 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 9 states. [2019-11-27 22:18:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:01,893 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2019-11-27 22:18:01,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-27 22:18:01,893 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-27 22:18:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:01,894 INFO L225 Difference]: With dead ends: 171 [2019-11-27 22:18:01,895 INFO L226 Difference]: Without dead ends: 116 [2019-11-27 22:18:01,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-11-27 22:18:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-27 22:18:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2019-11-27 22:18:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-27 22:18:01,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2019-11-27 22:18:01,903 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 47 [2019-11-27 22:18:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:01,904 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2019-11-27 22:18:01,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-27 22:18:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2019-11-27 22:18:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-27 22:18:01,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:01,905 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:18:02,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:02,116 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash -384159915, now seen corresponding path program 1 times [2019-11-27 22:18:02,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:02,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259786768] [2019-11-27 22:18:02,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:02,131 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:02,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850936374] [2019-11-27 22:18:02,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:18:02,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-27 22:18:02,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-27 22:18:02,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259786768] [2019-11-27 22:18:02,239 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:02,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850936374] [2019-11-27 22:18:02,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:02,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-27 22:18:02,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713814883] [2019-11-27 22:18:02,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-27 22:18:02,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-27 22:18:02,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-27 22:18:02,242 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand 8 states. [2019-11-27 22:18:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:02,334 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2019-11-27 22:18:02,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-27 22:18:02,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-11-27 22:18:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:02,336 INFO L225 Difference]: With dead ends: 138 [2019-11-27 22:18:02,336 INFO L226 Difference]: Without dead ends: 105 [2019-11-27 22:18:02,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-11-27 22:18:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-27 22:18:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-11-27 22:18:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-27 22:18:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2019-11-27 22:18:02,343 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 53 [2019-11-27 22:18:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:02,344 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2019-11-27 22:18:02,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-27 22:18:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2019-11-27 22:18:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-27 22:18:02,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:02,345 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1] [2019-11-27 22:18:02,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:02,549 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1685231241, now seen corresponding path program 2 times [2019-11-27 22:18:02,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:02,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273900635] [2019-11-27 22:18:02,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:02,572 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:02,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765288600] [2019-11-27 22:18:02,572 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 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 22:18:02,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 22:18:02,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:18:02,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-27 22:18:02,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:18:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-27 22:18:02,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273900635] [2019-11-27 22:18:02,718 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:18:02,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765288600] [2019-11-27 22:18:02,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:18:02,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-27 22:18:02,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62870975] [2019-11-27 22:18:02,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-27 22:18:02,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:18:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-27 22:18:02,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-27 22:18:02,719 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 10 states. [2019-11-27 22:18:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:18:02,965 INFO L93 Difference]: Finished difference Result 272 states and 342 transitions. [2019-11-27 22:18:02,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-27 22:18:02,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2019-11-27 22:18:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:18:02,967 INFO L225 Difference]: With dead ends: 272 [2019-11-27 22:18:02,967 INFO L226 Difference]: Without dead ends: 187 [2019-11-27 22:18:02,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-27 22:18:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-27 22:18:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2019-11-27 22:18:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-27 22:18:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2019-11-27 22:18:02,983 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 55 [2019-11-27 22:18:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:18:02,986 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2019-11-27 22:18:02,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-27 22:18:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2019-11-27 22:18:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-27 22:18:02,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:18:02,988 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-27 22:18:03,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:03,192 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:18:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:18:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2019-11-27 22:18:03,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:18:03,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995212288] [2019-11-27 22:18:03,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:18:03,204 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:18:03,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433918938] [2019-11-27 22:18:03,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:18:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:18:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:18:03,363 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 22:18:03,363 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 22:18:03,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:18:03,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 10:18:03 BoogieIcfgContainer [2019-11-27 22:18:03,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 22:18:03,650 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 22:18:03,650 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 22:18:03,650 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 22:18:03,651 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:17:57" (3/4) ... [2019-11-27 22:18:03,654 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 22:18:03,727 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 22:18:03,727 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 22:18:03,729 INFO L168 Benchmark]: Toolchain (without parser) took 6973.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 218.6 MB). Free memory was 956.3 MB in the beginning and 1.0 GB in the end (delta: -47.7 MB). Peak memory consumption was 170.9 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:03,729 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 22:18:03,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.7 MB). Free memory was 956.3 MB in the beginning and 1.2 GB in the end (delta: -194.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:03,731 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:03,731 INFO L168 Benchmark]: Boogie Preprocessor took 30.02 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 22:18:03,731 INFO L168 Benchmark]: RCFGBuilder took 465.03 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: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:03,732 INFO L168 Benchmark]: TraceAbstraction took 5993.39 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 107.8 MB). Peak memory consumption was 171.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:03,732 INFO L168 Benchmark]: Witness Printer took 77.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-27 22:18:03,735 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 337.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.7 MB). Free memory was 956.3 MB in the beginning and 1.2 GB in the end (delta: -194.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 65.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.02 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 465.03 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: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5993.39 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 107.8 MB). Peak memory consumption was 171.8 MB. Max. memory is 11.5 GB. * Witness Printer took 77.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L6] int i; [L7] i = 0 VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND FALSE !(i < N) VAL [N=3] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [N=3] [L46] COND TRUE i N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L53] __VERIFIER_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 5.8s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 579 SDslu, 411 SDs, 0 SdLazy, 718 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=12, 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, 12 MinimizatonAttempts, 87 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 455 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 37966 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1412 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 168/199 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...