/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/array-examples/standard_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:33:30,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:33:30,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:33:30,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:33:30,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:33:30,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:33:30,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:33:30,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:33:30,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:33:30,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:33:30,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:33:30,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:33:30,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:33:30,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:33:30,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:33:30,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:33:30,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:33:30,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:33:30,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:33:30,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:33:30,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:33:30,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:33:30,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:33:30,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:33:30,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:33:30,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:33:30,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:33:30,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:33:30,586 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 20:33:30,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:33:30,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:33:30,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:33:30,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:33:30,604 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:33:30,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:33:30,605 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:33:30,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:33:30,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:33:30,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:33:30,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:33:30,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:33:30,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:33:30,606 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:33:30,607 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:33:30,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:33:30,607 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:33:30,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:33:30,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:33:30,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:33:30,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:33:30,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:33:30,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:33:30,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:33:30,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:33:30,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:33:30,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:33:30,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:33:30,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:33:30,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:33:30,881 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:33:30,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:33:30,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:33:30,906 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:33:30,906 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:33:30,907 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-2.i [2019-11-23 20:33:30,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f39e1e984/dab2f25db1424e299f24df49d09f8ac3/FLAG86419f67e [2019-11-23 20:33:31,441 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:33:31,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-2.i [2019-11-23 20:33:31,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f39e1e984/dab2f25db1424e299f24df49d09f8ac3/FLAG86419f67e [2019-11-23 20:33:31,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f39e1e984/dab2f25db1424e299f24df49d09f8ac3 [2019-11-23 20:33:31,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:33:31,873 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:33:31,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:31,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:33:31,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:33:31,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:31" (1/1) ... [2019-11-23 20:33:31,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1905ccef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:31, skipping insertion in model container [2019-11-23 20:33:31,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:31" (1/1) ... [2019-11-23 20:33:31,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:33:31,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:33:32,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:32,096 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:33:32,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:32,215 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:33:32,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32 WrapperNode [2019-11-23 20:33:32,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:32,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:32,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:33:32,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:33:32,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:32,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:33:32,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:33:32,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:33:32,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (1/1) ... [2019-11-23 20:33:32,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:33:32,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:33:32,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:33:32,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:33:32,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (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 20:33:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:33:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:33:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:33:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:33:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:33:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:33:32,659 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:33:32,660 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:33:32,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:32 BoogieIcfgContainer [2019-11-23 20:33:32,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:33:32,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:33:32,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:33:32,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:33:32,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:31" (1/3) ... [2019-11-23 20:33:32,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b21cfcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:32, skipping insertion in model container [2019-11-23 20:33:32,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:32" (2/3) ... [2019-11-23 20:33:32,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b21cfcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:32, skipping insertion in model container [2019-11-23 20:33:32,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:32" (3/3) ... [2019-11-23 20:33:32,668 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2019-11-23 20:33:32,676 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:33:32,682 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:33:32,692 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:33:32,712 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:33:32,712 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:33:32,713 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:33:32,713 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:33:32,713 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:33:32,713 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:33:32,713 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:33:32,713 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:33:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-23 20:33:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:33:32,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:32,731 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:32,731 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2019-11-23 20:33:32,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:32,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271597003] [2019-11-23 20:33:32,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:33:32,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271597003] [2019-11-23 20:33:32,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:32,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:33:32,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450634150] [2019-11-23 20:33:32,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:33:32,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:32,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:33:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:33:32,893 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-11-23 20:33:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:32,909 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2019-11-23 20:33:32,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:33:32,912 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:33:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:32,924 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:33:32,924 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:33:32,931 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 20:33:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:33:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:33:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:33:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2019-11-23 20:33:32,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 10 [2019-11-23 20:33:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:32,963 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2019-11-23 20:33:32,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:33:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2019-11-23 20:33:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:33:32,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:32,965 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:32,966 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:32,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:32,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1948917626, now seen corresponding path program 1 times [2019-11-23 20:33:32,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:32,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489819871] [2019-11-23 20:33:32,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:33,028 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 20:33:33,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489819871] [2019-11-23 20:33:33,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:33,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:33:33,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934416552] [2019-11-23 20:33:33,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:33:33,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:33:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:33:33,032 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 3 states. [2019-11-23 20:33:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:33,144 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2019-11-23 20:33:33,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:33:33,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:33:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:33,146 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:33:33,146 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:33:33,148 INFO L630 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 [2019-11-23 20:33:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:33:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2019-11-23 20:33:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:33:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-11-23 20:33:33,155 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2019-11-23 20:33:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:33,155 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-23 20:33:33,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:33:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-11-23 20:33:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:33:33,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:33,156 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:33,157 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2019-11-23 20:33:33,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:33,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829342687] [2019-11-23 20:33:33,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:33:33,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829342687] [2019-11-23 20:33:33,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:33,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 20:33:33,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2274619] [2019-11-23 20:33:33,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:33:33,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:33,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:33:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:33,296 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 5 states. [2019-11-23 20:33:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:33,403 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-23 20:33:33,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:33:33,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-23 20:33:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:33,405 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:33:33,405 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:33:33,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:33:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-23 20:33:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:33:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2019-11-23 20:33:33,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 22 [2019-11-23 20:33:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:33,411 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2019-11-23 20:33:33,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:33:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2019-11-23 20:33:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:33:33,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:33,413 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:33,413 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1164203363, now seen corresponding path program 1 times [2019-11-23 20:33:33,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:33,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928303521] [2019-11-23 20:33:33,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:33:33,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928303521] [2019-11-23 20:33:33,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:33,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 20:33:33,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367110573] [2019-11-23 20:33:33,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:33:33,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:33,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:33:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:33,529 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 5 states. [2019-11-23 20:33:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:33,640 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2019-11-23 20:33:33,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:33:33,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-23 20:33:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:33,642 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:33:33,642 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:33:33,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:33:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2019-11-23 20:33:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:33:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-11-23 20:33:33,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 22 [2019-11-23 20:33:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:33,648 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-11-23 20:33:33,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:33:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-11-23 20:33:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:33:33,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:33,649 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:33,650 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash 610803999, now seen corresponding path program 1 times [2019-11-23 20:33:33,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:33,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484029522] [2019-11-23 20:33:33,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:33,692 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 20:33:33,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484029522] [2019-11-23 20:33:33,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313426732] [2019-11-23 20:33:33,693 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 20:33:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:33,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:33:33,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:33,791 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 20:33:33,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:33,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:33:33,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466656792] [2019-11-23 20:33:33,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:33:33,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:33,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:33:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:33,793 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 5 states. [2019-11-23 20:33:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:33,894 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2019-11-23 20:33:33,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:33:33,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-23 20:33:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:33,895 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:33:33,895 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:33:33,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:33:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2019-11-23 20:33:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:33:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2019-11-23 20:33:33,903 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 22 [2019-11-23 20:33:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:33,903 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2019-11-23 20:33:33,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:33:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2019-11-23 20:33:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:33:33,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:33,905 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:34,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:34,107 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash 271130974, now seen corresponding path program 2 times [2019-11-23 20:33:34,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:34,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469496045] [2019-11-23 20:33:34,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:33:34,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469496045] [2019-11-23 20:33:34,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314205584] [2019-11-23 20:33:34,173 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 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 20:33:34,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:34,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:34,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:33:34,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:33:34,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:34,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:33:34,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033973112] [2019-11-23 20:33:34,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:33:34,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:34,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:33:34,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:34,248 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 6 states. [2019-11-23 20:33:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:34,374 INFO L93 Difference]: Finished difference Result 108 states and 150 transitions. [2019-11-23 20:33:34,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:33:34,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-11-23 20:33:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:34,377 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:33:34,377 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:33:34,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:33:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2019-11-23 20:33:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:33:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2019-11-23 20:33:34,395 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2019-11-23 20:33:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:34,395 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2019-11-23 20:33:34,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:33:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2019-11-23 20:33:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:33:34,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:34,398 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:34,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:34,600 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:34,600 INFO L82 PathProgramCache]: Analyzing trace with hash 984188611, now seen corresponding path program 3 times [2019-11-23 20:33:34,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:34,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295807013] [2019-11-23 20:33:34,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:33:34,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295807013] [2019-11-23 20:33:34,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612992114] [2019-11-23 20:33:34,677 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 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 20:33:34,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:33:34,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:34,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:33:34,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:34,779 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:33:34,780 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:34,788 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:34,788 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:34,789 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 20:33:34,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:34,967 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:34,967 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 33 [2019-11-23 20:33:34,968 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:34,984 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:34,984 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 35 [2019-11-23 20:33:34,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:34,988 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:35,035 INFO L567 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2019-11-23 20:33:35,038 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 20:33:35,041 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:69, output treesize:18 [2019-11-23 20:33:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:33:35,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:35,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2019-11-23 20:33:35,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334750919] [2019-11-23 20:33:35,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:33:35,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:35,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:33:35,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:33:35,137 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 13 states. [2019-11-23 20:33:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:35,880 INFO L93 Difference]: Finished difference Result 246 states and 354 transitions. [2019-11-23 20:33:35,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:33:35,880 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-11-23 20:33:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:35,885 INFO L225 Difference]: With dead ends: 246 [2019-11-23 20:33:35,886 INFO L226 Difference]: Without dead ends: 196 [2019-11-23 20:33:35,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:33:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-11-23 20:33:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2019-11-23 20:33:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-23 20:33:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 247 transitions. [2019-11-23 20:33:35,923 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 247 transitions. Word has length 46 [2019-11-23 20:33:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:35,924 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 247 transitions. [2019-11-23 20:33:35,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:33:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 247 transitions. [2019-11-23 20:33:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 20:33:35,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:35,927 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:36,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:36,130 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:36,131 INFO L82 PathProgramCache]: Analyzing trace with hash 852556072, now seen corresponding path program 1 times [2019-11-23 20:33:36,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:36,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336943720] [2019-11-23 20:33:36,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:33:36,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336943720] [2019-11-23 20:33:36,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619995609] [2019-11-23 20:33:36,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:36,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:33:36,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:33:36,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:36,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:33:36,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389515158] [2019-11-23 20:33:36,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:33:36,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:36,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:33:36,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:33:36,398 INFO L87 Difference]: Start difference. First operand 177 states and 247 transitions. Second operand 10 states. [2019-11-23 20:33:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:36,596 INFO L93 Difference]: Finished difference Result 420 states and 586 transitions. [2019-11-23 20:33:36,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:33:36,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2019-11-23 20:33:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:36,598 INFO L225 Difference]: With dead ends: 420 [2019-11-23 20:33:36,598 INFO L226 Difference]: Without dead ends: 258 [2019-11-23 20:33:36,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:33:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-11-23 20:33:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 204. [2019-11-23 20:33:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 20:33:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2019-11-23 20:33:36,615 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 82 [2019-11-23 20:33:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:36,616 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2019-11-23 20:33:36,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:33:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2019-11-23 20:33:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 20:33:36,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:36,619 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:36,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:36,823 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:36,824 INFO L82 PathProgramCache]: Analyzing trace with hash -937413107, now seen corresponding path program 2 times [2019-11-23 20:33:36,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:36,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105777602] [2019-11-23 20:33:36,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-23 20:33:36,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105777602] [2019-11-23 20:33:36,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493342546] [2019-11-23 20:33:36,979 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 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 20:33:37,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:37,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:37,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:33:37,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-23 20:33:37,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:37,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:33:37,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235863779] [2019-11-23 20:33:37,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:33:37,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:33:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:37,088 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 11 states. [2019-11-23 20:33:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:37,248 INFO L93 Difference]: Finished difference Result 472 states and 660 transitions. [2019-11-23 20:33:37,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:33:37,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2019-11-23 20:33:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:37,250 INFO L225 Difference]: With dead ends: 472 [2019-11-23 20:33:37,251 INFO L226 Difference]: Without dead ends: 285 [2019-11-23 20:33:37,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-11-23 20:33:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2019-11-23 20:33:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2019-11-23 20:33:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 323 transitions. [2019-11-23 20:33:37,264 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 323 transitions. Word has length 94 [2019-11-23 20:33:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:37,265 INFO L462 AbstractCegarLoop]: Abstraction has 231 states and 323 transitions. [2019-11-23 20:33:37,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:33:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 323 transitions. [2019-11-23 20:33:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 20:33:37,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:37,268 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:37,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:37,472 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1234891020, now seen corresponding path program 3 times [2019-11-23 20:33:37,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:37,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673548172] [2019-11-23 20:33:37,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2019-11-23 20:33:37,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673548172] [2019-11-23 20:33:37,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267815009] [2019-11-23 20:33:37,651 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:37,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:33:37,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:37,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:33:37,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:37,741 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:33:37,741 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:37,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:37,743 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:37,743 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:33:37,811 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-23 20:33:37,812 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2019-11-23 20:33:37,813 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:37,820 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:37,821 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:37,821 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2019-11-23 20:33:37,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:37,964 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:33:37,982 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:37,983 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 52 [2019-11-23 20:33:37,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:37,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:37,985 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:38,021 INFO L343 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-11-23 20:33:38,022 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 50 [2019-11-23 20:33:38,023 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:38,057 INFO L567 ElimStorePlain]: treesize reduction 1, result has 97.2 percent of original size [2019-11-23 20:33:38,059 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-23 20:33:38,059 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:87, output treesize:17 [2019-11-23 20:33:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 34 proven. 88 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2019-11-23 20:33:38,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:38,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-11-23 20:33:38,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551475925] [2019-11-23 20:33:38,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:33:38,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:38,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:33:38,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:33:38,236 INFO L87 Difference]: Start difference. First operand 231 states and 323 transitions. Second operand 22 states. [2019-11-23 20:33:41,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:41,244 INFO L93 Difference]: Finished difference Result 820 states and 1157 transitions. [2019-11-23 20:33:41,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-11-23 20:33:41,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2019-11-23 20:33:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:41,249 INFO L225 Difference]: With dead ends: 820 [2019-11-23 20:33:41,249 INFO L226 Difference]: Without dead ends: 608 [2019-11-23 20:33:41,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1622, Invalid=5518, Unknown=0, NotChecked=0, Total=7140 [2019-11-23 20:33:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2019-11-23 20:33:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 478. [2019-11-23 20:33:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2019-11-23 20:33:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 677 transitions. [2019-11-23 20:33:41,271 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 677 transitions. Word has length 106 [2019-11-23 20:33:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:41,271 INFO L462 AbstractCegarLoop]: Abstraction has 478 states and 677 transitions. [2019-11-23 20:33:41,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:33:41,272 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 677 transitions. [2019-11-23 20:33:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-23 20:33:41,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:41,276 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:41,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:41,480 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash 267424402, now seen corresponding path program 4 times [2019-11-23 20:33:41,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:41,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181326354] [2019-11-23 20:33:41,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2019-11-23 20:33:41,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181326354] [2019-11-23 20:33:41,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680559389] [2019-11-23 20:33:41,736 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:41,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:41,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:41,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-23 20:33:41,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:41,892 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:33:41,893 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:41,897 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:41,897 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:41,898 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 20:33:41,948 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:41,949 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-11-23 20:33:41,949 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:41,974 INFO L567 ElimStorePlain]: treesize reduction 30, result has 44.4 percent of original size [2019-11-23 20:33:41,974 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:41,975 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-23 20:33:42,041 INFO L343 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2019-11-23 20:33:42,042 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2019-11-23 20:33:42,043 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:42,049 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:42,049 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:42,050 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2019-11-23 20:33:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 178 proven. 489 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-11-23 20:33:42,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:42,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 28] total 40 [2019-11-23 20:33:42,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797721929] [2019-11-23 20:33:42,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:33:42,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:33:42,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:33:42,554 INFO L87 Difference]: Start difference. First operand 478 states and 677 transitions. Second operand 40 states. [2019-11-23 20:33:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:44,695 INFO L93 Difference]: Finished difference Result 1386 states and 1961 transitions. [2019-11-23 20:33:44,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:33:44,696 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2019-11-23 20:33:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:44,702 INFO L225 Difference]: With dead ends: 1386 [2019-11-23 20:33:44,702 INFO L226 Difference]: Without dead ends: 935 [2019-11-23 20:33:44,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1421, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:33:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2019-11-23 20:33:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 631. [2019-11-23 20:33:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-23 20:33:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 896 transitions. [2019-11-23 20:33:44,726 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 896 transitions. Word has length 154 [2019-11-23 20:33:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:44,727 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 896 transitions. [2019-11-23 20:33:44,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:33:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 896 transitions. [2019-11-23 20:33:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:33:44,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:44,730 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:44,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:44,934 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:44,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1067675147, now seen corresponding path program 5 times [2019-11-23 20:33:44,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:44,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303196272] [2019-11-23 20:33:44,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2019-11-23 20:33:45,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303196272] [2019-11-23 20:33:45,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693878439] [2019-11-23 20:33:45,129 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:05,849 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-23 20:34:05,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:05,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:34:05,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-11-23 20:34:05,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:05,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:34:05,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519814739] [2019-11-23 20:34:05,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:34:05,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:05,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:34:05,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:34:05,908 INFO L87 Difference]: Start difference. First operand 631 states and 896 transitions. Second operand 17 states. [2019-11-23 20:34:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:06,215 INFO L93 Difference]: Finished difference Result 1470 states and 2088 transitions. [2019-11-23 20:34:06,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:34:06,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 166 [2019-11-23 20:34:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:06,220 INFO L225 Difference]: With dead ends: 1470 [2019-11-23 20:34:06,221 INFO L226 Difference]: Without dead ends: 868 [2019-11-23 20:34:06,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:34:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2019-11-23 20:34:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 672. [2019-11-23 20:34:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2019-11-23 20:34:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 954 transitions. [2019-11-23 20:34:06,299 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 954 transitions. Word has length 166 [2019-11-23 20:34:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:06,300 INFO L462 AbstractCegarLoop]: Abstraction has 672 states and 954 transitions. [2019-11-23 20:34:06,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:34:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 954 transitions. [2019-11-23 20:34:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-23 20:34:06,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:06,305 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:06,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:06,520 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash -430823560, now seen corresponding path program 6 times [2019-11-23 20:34:06,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:06,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017891138] [2019-11-23 20:34:06,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2019-11-23 20:34:06,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017891138] [2019-11-23 20:34:06,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652879550] [2019-11-23 20:34:06,847 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:07,206 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:34:07,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:07,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:34:07,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:07,215 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:34:07,215 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:07,217 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:07,217 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:07,217 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:34:07,256 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-23 20:34:07,256 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2019-11-23 20:34:07,257 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:07,261 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:07,261 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:07,262 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-23 20:34:07,347 INFO L343 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2019-11-23 20:34:07,348 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2019-11-23 20:34:07,349 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:07,356 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:07,357 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:07,357 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2019-11-23 20:34:11,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:11,890 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:34:11,892 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:34:11,894 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:34:11,920 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:11,920 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 72 [2019-11-23 20:34:11,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:11,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:11,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:11,923 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:11,964 INFO L343 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2019-11-23 20:34:11,965 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 70 [2019-11-23 20:34:11,966 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:12,006 INFO L567 ElimStorePlain]: treesize reduction 1, result has 97.8 percent of original size [2019-11-23 20:34:12,009 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-23 20:34:12,010 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:111, output treesize:23 [2019-11-23 20:34:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 98 proven. 246 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2019-11-23 20:34:12,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:12,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-11-23 20:34:12,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4748047] [2019-11-23 20:34:12,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:34:12,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:34:12,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=659, Unknown=1, NotChecked=0, Total=930 [2019-11-23 20:34:12,319 INFO L87 Difference]: Start difference. First operand 672 states and 954 transitions. Second operand 31 states. [2019-11-23 20:34:24,798 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-11-23 20:34:36,958 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2019-11-23 20:34:53,857 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-11-23 20:35:10,082 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36