/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_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:28:08,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:28:08,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:28:08,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:28:08,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:28:08,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:28:08,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:28:08,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:28:08,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:28:08,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:28:08,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:28:08,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:28:08,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:28:08,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:28:08,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:28:08,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:28:08,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:28:08,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:28:08,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:28:08,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:28:08,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:28:08,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:28:08,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:28:08,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:28:08,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:28:08,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:28:08,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:28:08,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:28:08,979 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 20:28:08,992 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:28:08,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:28:08,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:28:08,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:28:08,994 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:28:08,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:28:08,995 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:28:08,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:28:08,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:28:08,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:28:08,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:28:08,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:28:08,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:28:08,996 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:28:08,996 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:28:08,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:28:08,997 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:28:08,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:28:08,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:28:08,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:28:08,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:28:08,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:28:08,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:28:08,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:28:08,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:28:08,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:28:08,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:28:08,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:28:08,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:28:08,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:28:09,270 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:28:09,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:28:09,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:28:09,288 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:28:09,288 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:28:09,289 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-11-23 20:28:09,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71aed04a4/18ffb1d8cac945748b0417b39b80fbab/FLAGd3822ef29 [2019-11-23 20:28:09,850 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:28:09,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-11-23 20:28:09,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71aed04a4/18ffb1d8cac945748b0417b39b80fbab/FLAGd3822ef29 [2019-11-23 20:28:10,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71aed04a4/18ffb1d8cac945748b0417b39b80fbab [2019-11-23 20:28:10,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:28:10,209 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:28:10,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:28:10,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:28:10,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:28:10,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f46c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10, skipping insertion in model container [2019-11-23 20:28:10,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:28:10,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:28:10,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:28:10,439 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:28:10,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:28:10,479 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:28:10,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10 WrapperNode [2019-11-23 20:28:10,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:28:10,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:28:10,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:28:10,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:28:10,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:28:10,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:28:10,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:28:10,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:28:10,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (1/1) ... [2019-11-23 20:28:10,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:28:10,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:28:10,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:28:10,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:28:10,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (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 20:28:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:28:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:28:10,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:28:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:28:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:28:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:28:11,026 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:28:11,027 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:28:11,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:28:11 BoogieIcfgContainer [2019-11-23 20:28:11,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:28:11,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:28:11,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:28:11,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:28:11,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:28:10" (1/3) ... [2019-11-23 20:28:11,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de3464a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:28:11, skipping insertion in model container [2019-11-23 20:28:11,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:28:10" (2/3) ... [2019-11-23 20:28:11,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de3464a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:28:11, skipping insertion in model container [2019-11-23 20:28:11,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:28:11" (3/3) ... [2019-11-23 20:28:11,036 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2019-11-23 20:28:11,044 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:28:11,051 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:28:11,062 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:28:11,084 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:28:11,084 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:28:11,084 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:28:11,084 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:28:11,084 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:28:11,085 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:28:11,085 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:28:11,085 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:28:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 20:28:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:28:11,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:11,108 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:11,109 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash 846254768, now seen corresponding path program 1 times [2019-11-23 20:28:11,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:11,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121992740] [2019-11-23 20:28:11,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:11,271 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 20:28:11,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121992740] [2019-11-23 20:28:11,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:28:11,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:28:11,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515316220] [2019-11-23 20:28:11,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:28:11,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:11,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:28:11,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:28:11,301 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-23 20:28:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:11,449 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2019-11-23 20:28:11,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:28:11,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 20:28:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:11,464 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:28:11,464 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:28:11,471 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 20:28:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:28:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:28:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:28:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-23 20:28:11,518 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2019-11-23 20:28:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:11,518 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-23 20:28:11,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:28:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-23 20:28:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:28:11,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:11,520 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] [2019-11-23 20:28:11,520 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:11,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1299919835, now seen corresponding path program 1 times [2019-11-23 20:28:11,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:11,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101667632] [2019-11-23 20:28:11,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:28:11,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101667632] [2019-11-23 20:28:11,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303050802] [2019-11-23 20:28:11,615 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 20:28:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:11,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:28:11,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:28:11,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:11,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:28:11,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145649816] [2019-11-23 20:28:11,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:28:11,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:11,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:28:11,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:28:11,726 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2019-11-23 20:28:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:11,808 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2019-11-23 20:28:11,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:28:11,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-23 20:28:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:11,810 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:28:11,810 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:28:11,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 20:28:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:28:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:28:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:28:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-23 20:28:11,819 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2019-11-23 20:28:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:11,819 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-23 20:28:11,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:28:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-23 20:28:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:28:11,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:11,821 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:12,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:12,026 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:12,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1276432308, now seen corresponding path program 2 times [2019-11-23 20:28:12,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:12,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247645309] [2019-11-23 20:28:12,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:28:12,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247645309] [2019-11-23 20:28:12,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525443076] [2019-11-23 20:28:12,131 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 20:28:12,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:12,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:12,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:28:12,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:28:12,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:12,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:28:12,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263112205] [2019-11-23 20:28:12,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:28:12,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:12,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:28:12,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:28:12,204 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2019-11-23 20:28:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:12,305 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2019-11-23 20:28:12,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:28:12,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-23 20:28:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:12,307 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:28:12,307 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:28:12,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 20:28:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:28:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 20:28:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:28:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-23 20:28:12,315 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2019-11-23 20:28:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:12,316 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-23 20:28:12,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:28:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-23 20:28:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:28:12,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:12,317 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:12,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:12,522 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1067918085, now seen corresponding path program 3 times [2019-11-23 20:28:12,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:12,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137604008] [2019-11-23 20:28:12,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:28:12,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137604008] [2019-11-23 20:28:12,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895202562] [2019-11-23 20:28:12,646 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 20:28:12,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:28:12,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:12,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:28:12,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:28:12,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:12,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:28:12,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496287202] [2019-11-23 20:28:12,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:28:12,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:28:12,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:28:12,744 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2019-11-23 20:28:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:12,835 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2019-11-23 20:28:12,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:28:12,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-11-23 20:28:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:12,836 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:28:12,836 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:28:12,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:28:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:28:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:28:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:28:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-11-23 20:28:12,844 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 30 [2019-11-23 20:28:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:12,844 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-11-23 20:28:12,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:28:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-11-23 20:28:12,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:28:12,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:12,846 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:13,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:13,058 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:13,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1604238356, now seen corresponding path program 4 times [2019-11-23 20:28:13,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:13,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467002162] [2019-11-23 20:28:13,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:28:13,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467002162] [2019-11-23 20:28:13,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650226540] [2019-11-23 20:28:13,160 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 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 20:28:13,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:13,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:13,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:28:13,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:28:13,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:13,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:28:13,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987829426] [2019-11-23 20:28:13,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:28:13,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:13,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:28:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:28:13,233 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2019-11-23 20:28:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:13,334 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2019-11-23 20:28:13,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:28:13,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-11-23 20:28:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:13,336 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:28:13,336 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:28:13,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:28:13,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:28:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 20:28:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:28:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-11-23 20:28:13,343 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 35 [2019-11-23 20:28:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:13,344 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-11-23 20:28:13,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:28:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-11-23 20:28:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:28:13,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:13,345 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:13,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:13,546 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash 313549285, now seen corresponding path program 5 times [2019-11-23 20:28:13,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:13,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078860113] [2019-11-23 20:28:13,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:28:13,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078860113] [2019-11-23 20:28:13,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170208621] [2019-11-23 20:28:13,687 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 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 20:28:14,965 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:28:14,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:14,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:28:14,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:28:14,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:14,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:28:14,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736500997] [2019-11-23 20:28:14,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:28:14,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:28:14,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:28:14,997 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2019-11-23 20:28:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:15,093 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2019-11-23 20:28:15,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:28:15,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2019-11-23 20:28:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:15,094 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:28:15,094 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:28:15,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:28:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:28:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:28:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:28:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-11-23 20:28:15,102 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 40 [2019-11-23 20:28:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:15,102 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-11-23 20:28:15,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:28:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-11-23 20:28:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:28:15,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:15,103 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:15,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:15,317 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 355512204, now seen corresponding path program 6 times [2019-11-23 20:28:15,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:15,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000759060] [2019-11-23 20:28:15,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:28:15,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000759060] [2019-11-23 20:28:15,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719883448] [2019-11-23 20:28:15,464 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 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 20:28:15,984 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:28:15,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:15,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:28:15,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:28:16,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:16,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:28:16,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173117859] [2019-11-23 20:28:16,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:28:16,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:16,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:28:16,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:28:16,006 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2019-11-23 20:28:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:16,241 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2019-11-23 20:28:16,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:28:16,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-23 20:28:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:16,242 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:28:16,242 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:28:16,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 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 20:28:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:28:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 20:28:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:28:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2019-11-23 20:28:16,249 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 45 [2019-11-23 20:28:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:16,250 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2019-11-23 20:28:16,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:28:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2019-11-23 20:28:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:28:16,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:16,251 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:16,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:16,452 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash -215316283, now seen corresponding path program 7 times [2019-11-23 20:28:16,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:16,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863806673] [2019-11-23 20:28:16,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:28:16,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863806673] [2019-11-23 20:28:16,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139138273] [2019-11-23 20:28:16,564 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:16,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:28:16,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:28:16,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:16,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:28:16,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088774335] [2019-11-23 20:28:16,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:28:16,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:16,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:28:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:28:16,656 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 11 states. [2019-11-23 20:28:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:16,780 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2019-11-23 20:28:16,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:28:16,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2019-11-23 20:28:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:16,783 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:28:16,783 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:28:16,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 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 20:28:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:28:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:28:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:28:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-11-23 20:28:16,791 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 50 [2019-11-23 20:28:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:16,791 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-11-23 20:28:16,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:28:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-11-23 20:28:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:28:16,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:16,792 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:16,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:16,996 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1821412564, now seen corresponding path program 8 times [2019-11-23 20:28:16,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:16,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875850052] [2019-11-23 20:28:16,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:28:17,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875850052] [2019-11-23 20:28:17,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072160774] [2019-11-23 20:28:17,116 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:17,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:17,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:17,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:28:17,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:28:17,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:17,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:28:17,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792522342] [2019-11-23 20:28:17,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:28:17,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:17,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:28:17,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:28:17,189 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 12 states. [2019-11-23 20:28:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:17,300 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2019-11-23 20:28:17,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:28:17,300 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-11-23 20:28:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:17,301 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:28:17,302 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:28:17,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:28:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:28:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-23 20:28:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:28:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2019-11-23 20:28:17,311 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 55 [2019-11-23 20:28:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:17,311 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2019-11-23 20:28:17,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:28:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2019-11-23 20:28:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:28:17,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:17,313 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:17,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:17,516 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash 622827429, now seen corresponding path program 9 times [2019-11-23 20:28:17,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:17,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301995271] [2019-11-23 20:28:17,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:28:17,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301995271] [2019-11-23 20:28:17,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824179412] [2019-11-23 20:28:17,661 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 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 20:28:21,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:28:21,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:21,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:28:21,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:28:21,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:21,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:28:21,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823421129] [2019-11-23 20:28:21,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:28:21,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:28:21,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:28:21,519 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 13 states. [2019-11-23 20:28:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:21,662 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2019-11-23 20:28:21,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:28:21,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2019-11-23 20:28:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:21,663 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:28:21,663 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:28:21,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:28:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:28:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-23 20:28:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:28:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2019-11-23 20:28:21,674 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 60 [2019-11-23 20:28:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:21,674 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2019-11-23 20:28:21,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:28:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2019-11-23 20:28:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:28:21,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:21,676 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:21,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:21,885 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1605603020, now seen corresponding path program 10 times [2019-11-23 20:28:21,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:21,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693467525] [2019-11-23 20:28:21,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-23 20:28:22,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693467525] [2019-11-23 20:28:22,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964292703] [2019-11-23 20:28:22,028 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:22,087 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:22,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:22,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:28:22,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-23 20:28:22,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:22,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:28:22,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941077052] [2019-11-23 20:28:22,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:28:22,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:22,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:28:22,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:28:22,116 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 14 states. [2019-11-23 20:28:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:22,265 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2019-11-23 20:28:22,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:28:22,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2019-11-23 20:28:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:22,267 INFO L225 Difference]: With dead ends: 128 [2019-11-23 20:28:22,267 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:28:22,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:28:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:28:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-11-23 20:28:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:28:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2019-11-23 20:28:22,276 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 65 [2019-11-23 20:28:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:22,276 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2019-11-23 20:28:22,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:28:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2019-11-23 20:28:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:28:22,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:22,278 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:22,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:22,482 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:22,483 INFO L82 PathProgramCache]: Analyzing trace with hash 152669829, now seen corresponding path program 11 times [2019-11-23 20:28:22,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:22,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862070687] [2019-11-23 20:28:22,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-11-23 20:28:22,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862070687] [2019-11-23 20:28:22,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591610368] [2019-11-23 20:28:22,662 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true