java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:59:18,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:59:18,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:59:18,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:59:18,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:59:18,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:59:18,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:59:18,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:59:18,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:59:18,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:59:18,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:59:18,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:59:18,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:59:18,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:59:18,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:59:18,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:59:18,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:59:18,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:59:18,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:59:18,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:59:18,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:59:18,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:59:18,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:59:18,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:59:18,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:59:18,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:59:18,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:59:18,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:59:18,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:59:18,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:59:18,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:59:18,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:59:18,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:59:18,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:59:18,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:59:18,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:59:18,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 12:59:18,519 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:59:18,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:59:18,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:59:18,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:59:18,521 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:59:18,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:59:18,521 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:59:18,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:59:18,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:59:18,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:59:18,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:59:18,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:59:18,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:59:18,523 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:59:18,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:59:18,523 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:59:18,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:59:18,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:59:18,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:59:18,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:59:18,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:59:18,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:18,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:59:18,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:59:18,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:59:18,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:59:18,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:59:18,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:59:18,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:59:18,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:59:18,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:59:18,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:59:18,572 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:59:18,573 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:59:18,574 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2019-09-20 12:59:18,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c66ca451/a0d8faf2b2854c0d835b68583b979376/FLAG95dc997ce [2019-09-20 12:59:19,147 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:59:19,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2019-09-20 12:59:19,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c66ca451/a0d8faf2b2854c0d835b68583b979376/FLAG95dc997ce [2019-09-20 12:59:19,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c66ca451/a0d8faf2b2854c0d835b68583b979376 [2019-09-20 12:59:19,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:59:19,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:59:19,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:19,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:59:19,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:59:19,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50383ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19, skipping insertion in model container [2019-09-20 12:59:19,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,513 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:59:19,534 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:59:19,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:19,776 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:59:19,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:19,902 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:59:19,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19 WrapperNode [2019-09-20 12:59:19,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:19,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:59:19,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:59:19,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:59:19,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (1/1) ... [2019-09-20 12:59:19,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:59:19,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:59:19,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:59:19,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:59:19,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (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 [2019-09-20 12:59:20,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:59:20,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:59:20,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:59:20,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:59:20,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:59:20,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 12:59:20,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:59:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:59:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 12:59:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:59:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 12:59:20,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:59:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:59:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:59:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:59:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:59:20,350 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:59:20,350 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 12:59:20,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:20 BoogieIcfgContainer [2019-09-20 12:59:20,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:59:20,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:59:20,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:59:20,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:59:20,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:59:19" (1/3) ... [2019-09-20 12:59:20,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f75e213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:20, skipping insertion in model container [2019-09-20 12:59:20,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:19" (2/3) ... [2019-09-20 12:59:20,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f75e213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:20, skipping insertion in model container [2019-09-20 12:59:20,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:20" (3/3) ... [2019-09-20 12:59:20,376 INFO L109 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2019-09-20 12:59:20,390 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:59:20,405 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:59:20,431 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:59:20,471 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:59:20,472 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:59:20,472 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:59:20,472 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:59:20,472 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:59:20,472 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:59:20,473 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:59:20,473 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:59:20,473 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:59:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-09-20 12:59:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 12:59:20,505 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:20,505 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:20,507 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash -285010775, now seen corresponding path program 1 times [2019-09-20 12:59:20,513 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:20,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:20,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:20,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:20,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:20,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:20,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:59:20,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:59:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:59:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:20,685 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2019-09-20 12:59:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:20,712 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2019-09-20 12:59:20,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:59:20,714 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2019-09-20 12:59:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:20,723 INFO L225 Difference]: With dead ends: 59 [2019-09-20 12:59:20,724 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:59:20,728 INFO L636 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 [2019-09-20 12:59:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:59:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-20 12:59:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 12:59:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-20 12:59:20,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-09-20 12:59:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:20,772 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-20 12:59:20,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:59:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-20 12:59:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 12:59:20,773 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:20,773 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:20,774 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1627005719, now seen corresponding path program 1 times [2019-09-20 12:59:20,774 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:20,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:20,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:20,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:20,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:20,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:20,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:59:20,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:59:20,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:59:20,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:20,916 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2019-09-20 12:59:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:21,014 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-09-20 12:59:21,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:59:21,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-09-20 12:59:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:21,017 INFO L225 Difference]: With dead ends: 51 [2019-09-20 12:59:21,017 INFO L226 Difference]: Without dead ends: 31 [2019-09-20 12:59:21,018 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-20 12:59:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-20 12:59:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-20 12:59:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-09-20 12:59:21,034 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2019-09-20 12:59:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:21,035 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-09-20 12:59:21,035 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:59:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-09-20 12:59:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 12:59:21,038 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:21,038 INFO L407 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] [2019-09-20 12:59:21,039 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:21,039 INFO L82 PathProgramCache]: Analyzing trace with hash -381446827, now seen corresponding path program 1 times [2019-09-20 12:59:21,040 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:21,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:21,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:21,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:21,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:59:21,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:21,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 12:59:21,143 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 12:59:21,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 12:59:21,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:21,144 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 4 states. [2019-09-20 12:59:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:21,251 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-09-20 12:59:21,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 12:59:21,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-09-20 12:59:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:21,254 INFO L225 Difference]: With dead ends: 58 [2019-09-20 12:59:21,254 INFO L226 Difference]: Without dead ends: 41 [2019-09-20 12:59:21,255 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-20 12:59:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2019-09-20 12:59:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-20 12:59:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-20 12:59:21,267 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2019-09-20 12:59:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:21,268 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-20 12:59:21,268 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 12:59:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-20 12:59:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 12:59:21,269 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:21,269 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:21,270 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1677394545, now seen corresponding path program 1 times [2019-09-20 12:59:21,270 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:21,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:21,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:21,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:21,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 12:59:21,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:21,379 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:21,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:21,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:21,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 12:59:21,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:21,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-09-20 12:59:21,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:59:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:59:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:21,572 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2019-09-20 12:59:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:21,684 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-09-20 12:59:21,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:59:21,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-09-20 12:59:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:21,685 INFO L225 Difference]: With dead ends: 59 [2019-09-20 12:59:21,685 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 12:59:21,686 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 12:59:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-09-20 12:59:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-20 12:59:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-09-20 12:59:21,693 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2019-09-20 12:59:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:21,693 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-09-20 12:59:21,694 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:59:21,694 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-09-20 12:59:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-20 12:59:21,695 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:21,695 INFO L407 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, 1, 1, 1, 1, 1] [2019-09-20 12:59:21,695 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash 760173005, now seen corresponding path program 2 times [2019-09-20 12:59:21,696 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:21,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:21,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:21,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:21,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 12:59:21,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:21,792 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:21,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:21,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:21,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:21,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:21,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 12:59:21,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:21,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-09-20 12:59:21,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:21,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:21,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:21,906 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 7 states. [2019-09-20 12:59:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:22,077 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-09-20 12:59:22,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:59:22,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-09-20 12:59:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:22,079 INFO L225 Difference]: With dead ends: 72 [2019-09-20 12:59:22,079 INFO L226 Difference]: Without dead ends: 53 [2019-09-20 12:59:22,079 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-20 12:59:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2019-09-20 12:59:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 12:59:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-20 12:59:22,088 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2019-09-20 12:59:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:22,088 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-20 12:59:22,088 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-20 12:59:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-20 12:59:22,089 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:22,090 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:22,090 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1484472327, now seen corresponding path program 3 times [2019-09-20 12:59:22,091 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:22,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:22,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:22,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:22,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:23,392 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2019-09-20 12:59:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:23,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:23,520 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:23,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:23,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 12:59:23,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:23,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 65 conjunts are in the unsatisfiable core [2019-09-20 12:59:23,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:23,685 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:23,690 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 58 [2019-09-20 12:59:23,692 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:23,715 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:23,716 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:23,716 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:40 [2019-09-20 12:59:23,815 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-09-20 12:59:23,816 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:23,842 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:23,844 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:23,844 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:40 [2019-09-20 12:59:23,990 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:23,996 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 53 [2019-09-20 12:59:23,997 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:24,041 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:24,042 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:24,042 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:142, output treesize:89 [2019-09-20 12:59:24,209 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,219 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,223 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,225 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,235 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:24,236 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 118 [2019-09-20 12:59:24,237 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:24,322 INFO L567 ElimStorePlain]: treesize reduction 38, result has 76.1 percent of original size [2019-09-20 12:59:24,324 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-09-20 12:59:24,325 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:174, output treesize:121 [2019-09-20 12:59:24,571 INFO L172 IndexEqualityManager]: detected equality via solver [2019-09-20 12:59:24,579 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,580 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,581 INFO L172 IndexEqualityManager]: detected equality via solver [2019-09-20 12:59:24,585 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,599 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:24,600 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 132 [2019-09-20 12:59:24,604 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:24,699 INFO L567 ElimStorePlain]: treesize reduction 42, result has 75.9 percent of original size [2019-09-20 12:59:24,701 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-09-20 12:59:24,702 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:187, output treesize:132 [2019-09-20 12:59:24,919 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,921 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,923 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,925 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,926 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:24,972 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:24,972 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 220 [2019-09-20 12:59:24,975 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:25,105 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2019-09-20 12:59:25,106 INFO L567 ElimStorePlain]: treesize reduction 92, result has 66.4 percent of original size [2019-09-20 12:59:25,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,116 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-09-20 12:59:25,116 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:166, output treesize:173 [2019-09-20 12:59:25,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:25,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,045 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2019-09-20 12:59:28,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,265 INFO L392 ElimStorePlain]: Different costs {54=[|v_#memory_int_21|], 88=[v_prenex_5]} [2019-09-20 12:59:28,275 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:28,279 INFO L341 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2019-09-20 12:59:28,279 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2019-09-20 12:59:28,281 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:28,400 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2019-09-20 12:59:28,401 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:28,415 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:28,419 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:28,423 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:28,438 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:28,438 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 172 [2019-09-20 12:59:28,440 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:28,652 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2019-09-20 12:59:28,652 INFO L567 ElimStorePlain]: treesize reduction 42, result has 82.6 percent of original size [2019-09-20 12:59:28,655 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-09-20 12:59:28,655 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:288, output treesize:186 [2019-09-20 12:59:28,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,864 INFO L392 ElimStorePlain]: Different costs {40=[|v_#memory_int_22|], 70=[v_prenex_8]} [2019-09-20 12:59:28,876 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:28,902 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:28,903 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 157 [2019-09-20 12:59:28,905 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:29,168 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2019-09-20 12:59:29,169 INFO L567 ElimStorePlain]: treesize reduction 52, result has 83.0 percent of original size [2019-09-20 12:59:29,185 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:29,190 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:29,237 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:29,238 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 155 treesize of output 242 [2019-09-20 12:59:29,241 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:29,516 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2019-09-20 12:59:29,517 INFO L567 ElimStorePlain]: treesize reduction 74, result has 78.7 percent of original size [2019-09-20 12:59:29,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,526 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-09-20 12:59:29,527 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:276, output treesize:244 [2019-09-20 12:59:29,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:29,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:30,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:33,061 WARN L191 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2019-09-20 12:59:33,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-09-20 12:59:33,401 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2019-09-20 12:59:33,402 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:33,408 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:33,409 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:33,409 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:3 [2019-09-20 12:59:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:33,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:33,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24] total 40 [2019-09-20 12:59:33,507 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-20 12:59:33,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-20 12:59:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1338, Unknown=2, NotChecked=0, Total=1560 [2019-09-20 12:59:33,509 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 40 states. [2019-09-20 12:59:40,274 WARN L191 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 105 DAG size of output: 60 [2019-09-20 12:59:42,597 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 64 [2019-09-20 12:59:42,980 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 64 [2019-09-20 12:59:45,961 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 82 [2019-09-20 12:59:46,201 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2019-09-20 12:59:46,808 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2019-09-20 12:59:47,245 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2019-09-20 12:59:47,863 WARN L191 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 83 [2019-09-20 12:59:52,197 WARN L191 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2019-09-20 12:59:53,243 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 53 [2019-09-20 12:59:53,631 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 54 [2019-09-20 12:59:59,814 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 42 [2019-09-20 13:00:00,061 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2019-09-20 13:00:06,400 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 43 [2019-09-20 13:00:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:00:06,484 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2019-09-20 13:00:06,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-20 13:00:06,484 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 36 [2019-09-20 13:00:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:00:06,487 INFO L225 Difference]: With dead ends: 143 [2019-09-20 13:00:06,487 INFO L226 Difference]: Without dead ends: 141 [2019-09-20 13:00:06,492 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=968, Invalid=5508, Unknown=4, NotChecked=0, Total=6480 [2019-09-20 13:00:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-20 13:00:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 78. [2019-09-20 13:00:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-20 13:00:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2019-09-20 13:00:06,520 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 36 [2019-09-20 13:00:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:00:06,521 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2019-09-20 13:00:06,521 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-20 13:00:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2019-09-20 13:00:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-20 13:00:06,522 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:00:06,522 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:00:06,523 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:00:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:00:06,523 INFO L82 PathProgramCache]: Analyzing trace with hash 973091907, now seen corresponding path program 4 times [2019-09-20 13:00:06,523 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:00:06,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:00:06,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:00:06,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:00:06,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:00:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:00:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-20 13:00:06,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:00:06,614 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:00:06,638 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 13:00:06,675 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 13:00:06,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:00:06,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 13:00:06,681 INFO L279 TraceCheckSpWp]: Computing forward predicates...