/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:15:30,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:15:30,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:15:30,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:15:30,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:15:30,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:15:30,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:15:30,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:15:30,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:15:30,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:15:30,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:15:30,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:15:30,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:15:30,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:15:30,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:15:30,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:15:30,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:15:30,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:15:30,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:15:30,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:15:30,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:15:30,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:15:30,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:15:30,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:15:30,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:15:30,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:15:30,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:15:30,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:15:30,472 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 [2019-11-23 22:15:30,495 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:15:30,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:15:30,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:15:30,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:15:30,499 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:15:30,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:15:30,499 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:15:30,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:15:30,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:15:30,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:15:30,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:15:30,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:15:30,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:15:30,502 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:15:30,502 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:15:30,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:15:30,502 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:15:30,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:15:30,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:15:30,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:15:30,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:15:30,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:15:30,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:30,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:15:30,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:15:30,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:15:30,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:15:30,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:15:30,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:15:30,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:15:30,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:15:30,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:15:30,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:15:30,808 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:15:30,809 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:15:30,809 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2019-11-23 22:15:30,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e6230cb/82fac5b185bb40a6b46b7c790b44e0dc/FLAG3cb1ecc5b [2019-11-23 22:15:31,306 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:15:31,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i [2019-11-23 22:15:31,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e6230cb/82fac5b185bb40a6b46b7c790b44e0dc/FLAG3cb1ecc5b [2019-11-23 22:15:31,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e6230cb/82fac5b185bb40a6b46b7c790b44e0dc [2019-11-23 22:15:31,713 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:15:31,715 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:15:31,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:31,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:15:31,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:15:31,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7903bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31, skipping insertion in model container [2019-11-23 22:15:31,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:15:31,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:15:31,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:31,956 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:15:31,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:32,002 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:15:32,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32 WrapperNode [2019-11-23 22:15:32,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:32,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:32,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:15:32,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:15:32,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:32,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:15:32,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:15:32,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:15:32,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (1/1) ... [2019-11-23 22:15:32,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:15:32,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:15:32,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:15:32,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:15:32,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (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 [2019-11-23 22:15:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:15:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:15:32,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:15:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:15:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:15:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:15:32,547 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:15:32,547 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 22:15:32,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:32 BoogieIcfgContainer [2019-11-23 22:15:32,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:15:32,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:15:32,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:15:32,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:15:32,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:15:31" (1/3) ... [2019-11-23 22:15:32,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3db618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:32, skipping insertion in model container [2019-11-23 22:15:32,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:32" (2/3) ... [2019-11-23 22:15:32,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3db618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:32, skipping insertion in model container [2019-11-23 22:15:32,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:32" (3/3) ... [2019-11-23 22:15:32,565 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2019-11-23 22:15:32,576 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:15:32,582 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:15:32,602 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:15:32,629 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:15:32,629 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:15:32,629 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:15:32,629 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:15:32,629 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:15:32,629 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:15:32,630 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:15:32,630 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:15:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-23 22:15:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:15:32,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:32,648 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:32,649 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:32,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1741268329, now seen corresponding path program 1 times [2019-11-23 22:15:32,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:32,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386730798] [2019-11-23 22:15:32,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:32,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386730798] [2019-11-23 22:15:32,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:32,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:15:32,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992202648] [2019-11-23 22:15:32,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:15:32,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:15:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:15:32,812 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-11-23 22:15:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:32,832 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-23 22:15:32,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:15:32,834 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 22:15:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:32,843 INFO L225 Difference]: With dead ends: 41 [2019-11-23 22:15:32,844 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:15:32,847 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 [2019-11-23 22:15:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:15:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:15:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:15:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 22:15:32,884 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2019-11-23 22:15:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:32,885 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 22:15:32,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:15:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 22:15:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:15:32,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:32,887 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:32,888 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash -217285445, now seen corresponding path program 1 times [2019-11-23 22:15:32,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:32,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034426259] [2019-11-23 22:15:32,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:33,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034426259] [2019-11-23 22:15:33,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:33,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:15:33,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786901907] [2019-11-23 22:15:33,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:15:33,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:33,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:15:33,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:15:33,110 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2019-11-23 22:15:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:33,269 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2019-11-23 22:15:33,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:15:33,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:15:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:33,271 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:15:33,271 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:15:33,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:15:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:15:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2019-11-23 22:15:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:15:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-23 22:15:33,279 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 11 [2019-11-23 22:15:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:33,279 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-23 22:15:33,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:15:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-23 22:15:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:15:33,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:33,280 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:33,281 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2020776544, now seen corresponding path program 1 times [2019-11-23 22:15:33,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:33,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672565213] [2019-11-23 22:15:33,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:34,076 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 36 [2019-11-23 22:15:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:34,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672565213] [2019-11-23 22:15:34,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093180878] [2019-11-23 22:15:34,245 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 [2019-11-23 22:15:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:34,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:15:34,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:34,408 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:34,409 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2019-11-23 22:15:34,410 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:34,417 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:34,418 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:34,418 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2019-11-23 22:15:34,478 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-11-23 22:15:34,479 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:34,492 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:34,492 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:34,493 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-11-23 22:15:34,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:34,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:34,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-23 22:15:34,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132021568] [2019-11-23 22:15:34,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:15:34,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:15:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:15:34,605 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 12 states. [2019-11-23 22:15:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:35,126 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-11-23 22:15:35,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:15:35,127 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-11-23 22:15:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:35,129 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:15:35,129 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:15:35,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:15:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:15:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2019-11-23 22:15:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:15:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-23 22:15:35,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2019-11-23 22:15:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:35,143 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-23 22:15:35,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:15:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-23 22:15:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:15:35,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:35,144 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] [2019-11-23 22:15:35,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:35,345 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:35,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1709087114, now seen corresponding path program 1 times [2019-11-23 22:15:35,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:35,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467223157] [2019-11-23 22:15:35,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:35,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467223157] [2019-11-23 22:15:35,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30383716] [2019-11-23 22:15:35,541 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 [2019-11-23 22:15:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:35,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:15:35,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:35,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:35,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-23 22:15:35,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207468818] [2019-11-23 22:15:35,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:15:35,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:35,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:15:35,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:35,645 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2019-11-23 22:15:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:35,939 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2019-11-23 22:15:35,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:15:35,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-23 22:15:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:35,940 INFO L225 Difference]: With dead ends: 76 [2019-11-23 22:15:35,942 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:15:35,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:15:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:15:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2019-11-23 22:15:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 22:15:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-11-23 22:15:35,953 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2019-11-23 22:15:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:35,954 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-11-23 22:15:35,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:15:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-11-23 22:15:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:15:35,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:35,955 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:36,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:36,156 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:36,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:36,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1108233645, now seen corresponding path program 2 times [2019-11-23 22:15:36,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:36,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989460154] [2019-11-23 22:15:36,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:36,938 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-11-23 22:15:37,322 WARN L192 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 47 [2019-11-23 22:15:38,068 WARN L192 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 84 [2019-11-23 22:15:38,549 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 65 [2019-11-23 22:15:38,913 WARN L192 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2019-11-23 22:15:40,775 WARN L192 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2019-11-23 22:15:41,103 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 84 [2019-11-23 22:15:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:41,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989460154] [2019-11-23 22:15:41,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339278862] [2019-11-23 22:15:41,197 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 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 [2019-11-23 22:15:41,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:41,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:41,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:15:41,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:41,277 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:41,277 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2019-11-23 22:15:41,278 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:41,285 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:41,285 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:41,286 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2019-11-23 22:15:41,387 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-11-23 22:15:41,387 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:41,401 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:41,401 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:41,401 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2019-11-23 22:15:41,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:41,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:41,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2019-11-23 22:15:41,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808320595] [2019-11-23 22:15:41,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:15:41,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:41,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:15:41,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:15:41,877 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 22 states. [2019-11-23 22:15:46,284 WARN L192 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2019-11-23 22:15:46,742 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2019-11-23 22:15:47,023 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2019-11-23 22:15:47,380 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2019-11-23 22:15:47,734 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 100 [2019-11-23 22:15:47,881 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2019-11-23 22:15:48,414 WARN L192 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-23 22:15:48,566 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2019-11-23 22:15:48,698 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-11-23 22:15:48,903 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 56 [2019-11-23 22:15:49,425 WARN L192 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 81 [2019-11-23 22:15:49,770 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102 [2019-11-23 22:15:50,832 WARN L192 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2019-11-23 22:15:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:50,841 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2019-11-23 22:15:50,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:15:50,842 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2019-11-23 22:15:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:50,843 INFO L225 Difference]: With dead ends: 100 [2019-11-23 22:15:50,843 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:15:50,844 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=332, Invalid=1308, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:15:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:15:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2019-11-23 22:15:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:15:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2019-11-23 22:15:50,862 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 31 [2019-11-23 22:15:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:50,862 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2019-11-23 22:15:50,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:15:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2019-11-23 22:15:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:15:50,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:50,864 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:51,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:51,068 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2092880829, now seen corresponding path program 3 times [2019-11-23 22:15:51,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:51,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845650659] [2019-11-23 22:15:51,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:15:51,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845650659] [2019-11-23 22:15:51,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117168617] [2019-11-23 22:15:51,288 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 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 [2019-11-23 22:15:51,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:15:51,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:51,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:15:51,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 22:15:51,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:51,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2019-11-23 22:15:51,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225200134] [2019-11-23 22:15:51,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:15:51,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:51,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:15:51,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:15:51,498 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 15 states. [2019-11-23 22:15:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:52,146 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2019-11-23 22:15:52,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:15:52,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-11-23 22:15:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:52,148 INFO L225 Difference]: With dead ends: 118 [2019-11-23 22:15:52,148 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:15:52,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:15:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:15:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2019-11-23 22:15:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 22:15:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-23 22:15:52,168 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2019-11-23 22:15:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:52,169 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-23 22:15:52,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:15:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-23 22:15:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:15:52,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:52,173 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:52,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:52,373 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:52,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1732581416, now seen corresponding path program 4 times [2019-11-23 22:15:52,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:52,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192701688] [2019-11-23 22:15:52,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:53,241 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2019-11-23 22:15:53,717 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 46 [2019-11-23 22:15:54,185 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 54 [2019-11-23 22:15:54,691 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 51 [2019-11-23 22:15:54,932 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 53 [2019-11-23 22:15:55,376 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 47 [2019-11-23 22:15:55,668 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 50 [2019-11-23 22:15:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:55,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192701688] [2019-11-23 22:15:55,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823512685] [2019-11-23 22:15:55,721 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 22:15:55,780 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:55,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:55,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 22:15:55,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:55,797 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:55,798 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2019-11-23 22:15:55,799 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:55,805 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:55,805 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:55,806 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2019-11-23 22:15:55,976 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 22:15:55,976 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:55,984 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:55,985 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:55,985 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2019-11-23 22:15:56,000 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 62 [2019-11-23 22:15:56,002 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,030 INFO L567 ElimStorePlain]: treesize reduction 70, result has 42.1 percent of original size [2019-11-23 22:15:56,030 INFO L464 ElimStorePlain]: Eliminatee v_prenex_2 vanished before elimination [2019-11-23 22:15:56,031 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,031 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:125, output treesize:51 [2019-11-23 22:15:56,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:56,142 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:15:56,143 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:15:56,144 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:15:56,169 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 88 [2019-11-23 22:15:56,171 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,175 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:15:56,175 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,210 INFO L567 ElimStorePlain]: treesize reduction 5, result has 93.2 percent of original size [2019-11-23 22:15:56,210 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,210 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:159, output treesize:68 [2019-11-23 22:15:56,373 INFO L343 Elim1Store]: treesize reduction 124, result has 12.1 percent of original size [2019-11-23 22:15:56,373 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 88 [2019-11-23 22:15:56,375 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,391 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:56,392 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,392 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2019-11-23 22:15:56,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:15:56,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:56,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2019-11-23 22:15:56,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253739726] [2019-11-23 22:15:56,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:15:56,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:56,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:15:56,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:15:56,832 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 33 states. [2019-11-23 22:15:58,564 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 54 [2019-11-23 22:15:58,992 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 75 [2019-11-23 22:15:59,201 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 71 [2019-11-23 22:15:59,435 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 62 [2019-11-23 22:15:59,649 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2019-11-23 22:15:59,890 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 62 [2019-11-23 22:16:00,200 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 69 [2019-11-23 22:16:00,498 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 72 [2019-11-23 22:16:00,775 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 77 [2019-11-23 22:16:01,073 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2019-11-23 22:16:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:16:01,262 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2019-11-23 22:16:01,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:16:01,265 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 43 [2019-11-23 22:16:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:16:01,267 INFO L225 Difference]: With dead ends: 94 [2019-11-23 22:16:01,267 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 22:16:01,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 22:16:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 22:16:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2019-11-23 22:16:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:16:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2019-11-23 22:16:01,278 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 43 [2019-11-23 22:16:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:01,278 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2019-11-23 22:16:01,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:16:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2019-11-23 22:16:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:16:01,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:01,280 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:01,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:01,484 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:01,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1525407304, now seen corresponding path program 5 times [2019-11-23 22:16:01,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:01,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641768029] [2019-11-23 22:16:01,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 22:16:01,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641768029] [2019-11-23 22:16:01,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551768256] [2019-11-23 22:16:01,727 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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