./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifcompf.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de4e4f9395cc9c20789e46de0a1f371f25bb8eb0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:29:29,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 22:29:29,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 22:29:29,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 22:29:29,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 22:29:29,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 22:29:29,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 22:29:29,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 22:29:29,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 22:29:29,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 22:29:29,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 22:29:29,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 22:29:29,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 22:29:29,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 22:29:29,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 22:29:29,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 22:29:29,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 22:29:29,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 22:29:29,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 22:29:29,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 22:29:29,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 22:29:29,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 22:29:29,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 22:29:29,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 22:29:29,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 22:29:29,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 22:29:29,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 22:29:29,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 22:29:29,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 22:29:29,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 22:29:29,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 22:29:29,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 22:29:29,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 22:29:29,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 22:29:29,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 22:29:29,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 22:29:29,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 22:29:29,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 22:29:29,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 22:29:29,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 22:29:29,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 22:29:29,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 22:29:29,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 22:29:29,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 22:29:29,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 22:29:29,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 22:29:29,475 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 22:29:29,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 22:29:29,476 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 22:29:29,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 22:29:29,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 22:29:29,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 22:29:29,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 22:29:29,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 22:29:29,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 22:29:29,478 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 22:29:29,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 22:29:29,479 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 22:29:29,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 22:29:29,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 22:29:29,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 22:29:29,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 22:29:29,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 22:29:29,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 22:29:29,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 22:29:29,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 22:29:29,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 22:29:29,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 22:29:29,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 22:29:29,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 22:29:29,482 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 -> de4e4f9395cc9c20789e46de0a1f371f25bb8eb0 [2019-11-27 22:29:29,782 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 22:29:29,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 22:29:29,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 22:29:29,808 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 22:29:29,808 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 22:29:29,810 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcompf.c [2019-11-27 22:29:29,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220085cd2/7eca6bb4ba0d4bc3ab9e0e41eb05b697/FLAG15ba14781 [2019-11-27 22:29:30,346 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 22:29:30,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c [2019-11-27 22:29:30,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220085cd2/7eca6bb4ba0d4bc3ab9e0e41eb05b697/FLAG15ba14781 [2019-11-27 22:29:30,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220085cd2/7eca6bb4ba0d4bc3ab9e0e41eb05b697 [2019-11-27 22:29:30,756 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 22:29:30,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 22:29:30,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 22:29:30,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 22:29:30,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 22:29:30,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:29:30" (1/1) ... [2019-11-27 22:29:30,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c1ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:30, skipping insertion in model container [2019-11-27 22:29:30,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:29:30" (1/1) ... [2019-11-27 22:29:30,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 22:29:30,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 22:29:30,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:29:30,995 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 22:29:31,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:29:31,032 INFO L208 MainTranslator]: Completed translation [2019-11-27 22:29:31,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31 WrapperNode [2019-11-27 22:29:31,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 22:29:31,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 22:29:31,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 22:29:31,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 22:29:31,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 22:29:31,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 22:29:31,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 22:29:31,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 22:29:31,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (1/1) ... [2019-11-27 22:29:31,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 22:29:31,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 22:29:31,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 22:29:31,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 22:29:31,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (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 22:29:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 22:29:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 22:29:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 22:29:31,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 22:29:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 22:29:31,525 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 22:29:31,525 INFO L297 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-27 22:29:31,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:29:31 BoogieIcfgContainer [2019-11-27 22:29:31,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 22:29:31,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 22:29:31,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 22:29:31,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 22:29:31,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 10:29:30" (1/3) ... [2019-11-27 22:29:31,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37439b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:29:31, skipping insertion in model container [2019-11-27 22:29:31,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:29:31" (2/3) ... [2019-11-27 22:29:31,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37439b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:29:31, skipping insertion in model container [2019-11-27 22:29:31,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:29:31" (3/3) ... [2019-11-27 22:29:31,534 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2019-11-27 22:29:31,545 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 22:29:31,551 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 22:29:31,569 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 22:29:31,594 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 22:29:31,594 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 22:29:31,594 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 22:29:31,594 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 22:29:31,595 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 22:29:31,595 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 22:29:31,595 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 22:29:31,595 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 22:29:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-27 22:29:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-27 22:29:31,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:31,615 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:31,616 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash 638964938, now seen corresponding path program 1 times [2019-11-27 22:29:31,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:31,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826697894] [2019-11-27 22:29:31,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:31,763 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 22:29:31,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826697894] [2019-11-27 22:29:31,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:29:31,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 22:29:31,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428511641] [2019-11-27 22:29:31,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 22:29:31,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 22:29:31,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 22:29:31,784 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-27 22:29:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:31,799 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2019-11-27 22:29:31,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 22:29:31,800 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-27 22:29:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:31,809 INFO L225 Difference]: With dead ends: 44 [2019-11-27 22:29:31,809 INFO L226 Difference]: Without dead ends: 21 [2019-11-27 22:29:31,816 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 22:29:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-27 22:29:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-27 22:29:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-27 22:29:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2019-11-27 22:29:31,846 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 12 [2019-11-27 22:29:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:31,847 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2019-11-27 22:29:31,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 22:29:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2019-11-27 22:29:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-27 22:29:31,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:31,849 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:31,849 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -953872449, now seen corresponding path program 1 times [2019-11-27 22:29:31,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:31,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781124972] [2019-11-27 22:29:31,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:31,869 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:29:31,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265262319] [2019-11-27 22:29:31,870 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 22:29:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:31,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:29:31,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:29:32,004 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 22:29:32,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781124972] [2019-11-27 22:29:32,005 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:29:32,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265262319] [2019-11-27 22:29:32,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:29:32,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:29:32,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149910013] [2019-11-27 22:29:32,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:29:32,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:32,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:29:32,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:29:32,010 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 3 states. [2019-11-27 22:29:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:32,067 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-11-27 22:29:32,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:29:32,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-27 22:29:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:32,069 INFO L225 Difference]: With dead ends: 39 [2019-11-27 22:29:32,069 INFO L226 Difference]: Without dead ends: 24 [2019-11-27 22:29:32,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 22:29:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-27 22:29:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-27 22:29:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-27 22:29:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-27 22:29:32,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2019-11-27 22:29:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:32,077 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-27 22:29:32,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:29:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-27 22:29:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-27 22:29:32,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:32,078 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:32,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:32,280 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:32,281 INFO L82 PathProgramCache]: Analyzing trace with hash 361112916, now seen corresponding path program 1 times [2019-11-27 22:29:32,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:32,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265557685] [2019-11-27 22:29:32,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:32,300 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:29:32,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137780896] [2019-11-27 22:29:32,303 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 22:29:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:32,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:29:32,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:29:32,377 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 22:29:32,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265557685] [2019-11-27 22:29:32,380 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:29:32,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137780896] [2019-11-27 22:29:32,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:29:32,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 22:29:32,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319612556] [2019-11-27 22:29:32,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:29:32,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:29:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:29:32,384 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 4 states. [2019-11-27 22:29:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:32,476 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-11-27 22:29:32,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:29:32,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-27 22:29:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:32,480 INFO L225 Difference]: With dead ends: 47 [2019-11-27 22:29:32,480 INFO L226 Difference]: Without dead ends: 36 [2019-11-27 22:29:32,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 22:29:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-27 22:29:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2019-11-27 22:29:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-27 22:29:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-27 22:29:32,487 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2019-11-27 22:29:32,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:32,487 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-27 22:29:32,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:29:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-27 22:29:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-27 22:29:32,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:32,489 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 22:29:32,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:32,692 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1034367045, now seen corresponding path program 1 times [2019-11-27 22:29:32,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:32,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11610876] [2019-11-27 22:29:32,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:32,714 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:29:32,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770075455] [2019-11-27 22:29:32,714 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 22:29:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:32,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-27 22:29:32,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:29:32,823 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-27 22:29:32,824 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:29:32,828 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:29:32,828 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:29:32,829 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-27 22:29:32,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 22:29:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-27 22:29:32,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11610876] [2019-11-27 22:29:32,878 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:29:32,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770075455] [2019-11-27 22:29:32,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:29:32,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-27 22:29:32,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418837605] [2019-11-27 22:29:32,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 22:29:32,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:32,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 22:29:32,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-27 22:29:32,882 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 5 states. [2019-11-27 22:29:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:33,011 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-11-27 22:29:33,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-27 22:29:33,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-27 22:29:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:33,015 INFO L225 Difference]: With dead ends: 42 [2019-11-27 22:29:33,015 INFO L226 Difference]: Without dead ends: 40 [2019-11-27 22:29:33,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-27 22:29:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-27 22:29:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2019-11-27 22:29:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-27 22:29:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-27 22:29:33,024 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2019-11-27 22:29:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:33,024 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-27 22:29:33,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 22:29:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-27 22:29:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-27 22:29:33,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:33,026 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 22:29:33,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:33,231 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash 740640317, now seen corresponding path program 1 times [2019-11-27 22:29:33,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:33,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254205042] [2019-11-27 22:29:33,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:33,280 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:29:33,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611316846] [2019-11-27 22:29:33,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:33,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 22:29:33,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:29:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-27 22:29:33,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254205042] [2019-11-27 22:29:33,348 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:29:33,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611316846] [2019-11-27 22:29:33,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:29:33,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:29:33,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410467413] [2019-11-27 22:29:33,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:29:33,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:33,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:29:33,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:29:33,352 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 3 states. [2019-11-27 22:29:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:33,435 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2019-11-27 22:29:33,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:29:33,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-27 22:29:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:33,437 INFO L225 Difference]: With dead ends: 60 [2019-11-27 22:29:33,437 INFO L226 Difference]: Without dead ends: 34 [2019-11-27 22:29:33,440 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 22:29:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-27 22:29:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-11-27 22:29:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-27 22:29:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-11-27 22:29:33,453 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2019-11-27 22:29:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:33,454 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-11-27 22:29:33,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:29:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-11-27 22:29:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-27 22:29:33,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:33,456 INFO L410 BasicCegarLoop]: trace histogram [2, 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 22:29:33,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:33,656 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1318744497, now seen corresponding path program 1 times [2019-11-27 22:29:33,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:33,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033002162] [2019-11-27 22:29:33,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:33,673 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:29:33,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247249785] [2019-11-27 22:29:33,676 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 22:29:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:33,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 22:29:33,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:29:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-27 22:29:33,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033002162] [2019-11-27 22:29:33,771 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:29:33,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247249785] [2019-11-27 22:29:33,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:29:33,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-27 22:29:33,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733093134] [2019-11-27 22:29:33,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-27 22:29:33,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-27 22:29:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-27 22:29:33,774 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 7 states. [2019-11-27 22:29:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:33,970 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2019-11-27 22:29:33,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-27 22:29:33,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-27 22:29:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:33,971 INFO L225 Difference]: With dead ends: 85 [2019-11-27 22:29:33,972 INFO L226 Difference]: Without dead ends: 49 [2019-11-27 22:29:33,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-27 22:29:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-27 22:29:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-11-27 22:29:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-27 22:29:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-27 22:29:33,979 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2019-11-27 22:29:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:33,980 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-27 22:29:33,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-27 22:29:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-27 22:29:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-27 22:29:33,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:33,981 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:34,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:34,188 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 180948411, now seen corresponding path program 1 times [2019-11-27 22:29:34,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:34,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777067384] [2019-11-27 22:29:34,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:34,214 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:29:34,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659957845] [2019-11-27 22:29:34,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:29:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:29:34,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-27 22:29:34,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:29:34,308 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-27 22:29:34,309 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,316 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:29:34,317 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,317 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:4 [2019-11-27 22:29:34,343 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-27 22:29:34,343 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,350 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:29:34,351 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-27 22:29:34,519 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2019-11-27 22:29:34,521 INFO L343 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2019-11-27 22:29:34,522 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 140 [2019-11-27 22:29:34,525 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,585 INFO L588 ElimStorePlain]: treesize reduction 106, result has 38.0 percent of original size [2019-11-27 22:29:34,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 22:29:34,588 INFO L508 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,589 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:12 [2019-11-27 22:29:34,621 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-27 22:29:34,622 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,635 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:29:34,635 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,636 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-27 22:29:34,703 INFO L343 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2019-11-27 22:29:34,703 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2019-11-27 22:29:34,705 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:29:34,720 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:29:34,721 INFO L508 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-27 22:29:34,722 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:34 [2019-11-27 22:29:34,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 22:29:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-27 22:29:34,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777067384] [2019-11-27 22:29:34,856 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:29:34,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659957845] [2019-11-27 22:29:34,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:29:34,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-27 22:29:34,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541656938] [2019-11-27 22:29:34,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-27 22:29:34,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-27 22:29:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-27 22:29:34,858 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 14 states. [2019-11-27 22:29:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:35,315 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-11-27 22:29:35,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-27 22:29:35,317 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-11-27 22:29:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:35,318 INFO L225 Difference]: With dead ends: 66 [2019-11-27 22:29:35,318 INFO L226 Difference]: Without dead ends: 44 [2019-11-27 22:29:35,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2019-11-27 22:29:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-27 22:29:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2019-11-27 22:29:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-27 22:29:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-27 22:29:35,324 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 34 [2019-11-27 22:29:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:35,324 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-27 22:29:35,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-27 22:29:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-27 22:29:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-27 22:29:35,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:35,327 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-27 22:29:35,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:35,530 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:35,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1220259761, now seen corresponding path program 2 times [2019-11-27 22:29:35,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:35,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105093781] [2019-11-27 22:29:35,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:35,546 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:29:35,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060796216] [2019-11-27 22:29:35,547 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 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 22:29:35,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 22:29:35,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:29:35,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-27 22:29:35,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:29:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-27 22:29:35,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105093781] [2019-11-27 22:29:35,674 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-27 22:29:35,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060796216] [2019-11-27 22:29:35,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-27 22:29:35,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-27 22:29:35,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166294273] [2019-11-27 22:29:35,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-27 22:29:35,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:29:35,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-27 22:29:35,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-27 22:29:35,681 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-27 22:29:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:29:35,870 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2019-11-27 22:29:35,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-27 22:29:35,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-27 22:29:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:29:35,877 INFO L225 Difference]: With dead ends: 114 [2019-11-27 22:29:35,877 INFO L226 Difference]: Without dead ends: 62 [2019-11-27 22:29:35,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-27 22:29:35,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-27 22:29:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2019-11-27 22:29:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-27 22:29:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-11-27 22:29:35,891 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 38 [2019-11-27 22:29:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:29:35,891 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-11-27 22:29:35,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-27 22:29:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-11-27 22:29:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-27 22:29:35,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:29:35,895 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:29:36,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:36,098 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:29:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:29:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash -279478169, now seen corresponding path program 3 times [2019-11-27 22:29:36,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:29:36,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255232927] [2019-11-27 22:29:36,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:29:36,119 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-27 22:29:36,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440037111] [2019-11-27 22:29:36,120 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:29:36,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-27 22:29:36,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-27 22:29:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:29:36,278 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 22:29:36,278 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 22:29:36,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:29:36,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 10:29:36 BoogieIcfgContainer [2019-11-27 22:29:36,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 22:29:36,543 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 22:29:36,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 22:29:36,543 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 22:29:36,544 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:29:31" (3/4) ... [2019-11-27 22:29:36,549 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 22:29:36,655 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 22:29:36,655 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 22:29:36,657 INFO L168 Benchmark]: Toolchain (without parser) took 5899.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.1 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -134.5 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:36,657 INFO L168 Benchmark]: CDTParser took 0.29 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 22:29:36,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.41 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:36,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -157.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:36,659 INFO L168 Benchmark]: Boogie Preprocessor took 26.66 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 22:29:36,661 INFO L168 Benchmark]: RCFGBuilder took 364.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:36,662 INFO L168 Benchmark]: TraceAbstraction took 5014.90 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 75.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -14.9 MB). Peak memory consumption was 60.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:36,663 INFO L168 Benchmark]: Witness Printer took 112.34 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: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. [2019-11-27 22:29:36,665 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 274.41 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 100.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -157.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.66 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 364.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5014.90 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 75.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -14.9 MB). Peak memory consumption was 60.6 MB. Max. memory is 11.5 GB. * Witness Printer took 112.34 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: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L25] long long *c = malloc(sizeof(long long)*N); [L27] i=0 VAL [N=3] [L27] COND TRUE i