/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_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:27:47,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:27:47,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:27:47,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:27:47,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:27:47,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:27:47,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:27:47,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:27:47,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:27:47,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:27:47,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:27:47,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:27:47,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:27:47,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:27:47,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:27:47,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:27:47,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:27:47,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:27:47,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:27:47,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:27:47,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:27:47,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:27:47,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:27:47,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:27:47,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:27:47,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:27:47,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:27:47,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:27:47,208 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 20:27:47,222 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:27:47,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:27:47,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:27:47,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:27:47,224 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:27:47,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:27:47,224 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:27:47,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:27:47,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:27:47,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:27:47,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:27:47,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:27:47,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:27:47,226 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:27:47,226 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:27:47,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:27:47,226 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:27:47,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:27:47,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:27:47,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:27:47,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:27:47,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:27:47,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:27:47,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:27:47,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:27:47,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:27:47,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:27:47,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:27:47,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:27:47,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:27:47,501 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:27:47,519 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:27:47,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:27:47,524 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:27:47,524 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:27:47,525 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2019-11-23 20:27:47,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaabb6831/0598a5417d4f4daea323aa752522e29c/FLAGb5fade995 [2019-11-23 20:27:48,075 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:27:48,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2019-11-23 20:27:48,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaabb6831/0598a5417d4f4daea323aa752522e29c/FLAGb5fade995 [2019-11-23 20:27:48,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaabb6831/0598a5417d4f4daea323aa752522e29c [2019-11-23 20:27:48,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:27:48,449 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:27:48,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:48,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:27:48,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:27:48,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e223023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48, skipping insertion in model container [2019-11-23 20:27:48,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:27:48,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:27:48,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:48,733 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:27:48,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:48,774 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:27:48,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48 WrapperNode [2019-11-23 20:27:48,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:48,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:48,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:27:48,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:27:48,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:48,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:27:48,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:27:48,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:27:48,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:27:48,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:27:48,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:27:48,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:27:48,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (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 20:27:48,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:27:48,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:27:48,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:27:48,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:27:48,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:27:48,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:27:49,208 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:27:49,208 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:27:49,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:49 BoogieIcfgContainer [2019-11-23 20:27:49,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:27:49,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:27:49,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:27:49,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:27:49,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:27:48" (1/3) ... [2019-11-23 20:27:49,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d216fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:49, skipping insertion in model container [2019-11-23 20:27:49,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (2/3) ... [2019-11-23 20:27:49,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d216fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:49, skipping insertion in model container [2019-11-23 20:27:49,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:49" (3/3) ... [2019-11-23 20:27:49,220 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2019-11-23 20:27:49,230 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:27:49,238 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:27:49,253 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:27:49,291 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:27:49,291 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:27:49,291 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:27:49,291 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:27:49,292 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:27:49,292 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:27:49,292 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:27:49,292 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:27:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 20:27:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:27:49,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,314 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,315 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,321 INFO L82 PathProgramCache]: Analyzing trace with hash -93359874, now seen corresponding path program 1 times [2019-11-23 20:27:49,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797945776] [2019-11-23 20:27:49,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,496 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 20:27:49,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797945776] [2019-11-23 20:27:49,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:27:49,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:27:49,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612136910] [2019-11-23 20:27:49,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:27:49,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:27:49,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:27:49,522 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-23 20:27:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,594 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2019-11-23 20:27:49,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:27:49,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:27:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,617 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:27:49,617 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:27:49,624 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 20:27:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:27:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:27:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:27:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:27:49,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-23 20:27:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,676 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:27:49,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:27:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:27:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:27:49,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,678 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,680 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash -168681064, now seen corresponding path program 1 times [2019-11-23 20:27:49,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86994895] [2019-11-23 20:27:49,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,781 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 20:27:49,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86994895] [2019-11-23 20:27:49,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44185833] [2019-11-23 20:27:49,783 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 20:27:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:27:49,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:49,879 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 20:27:49,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:49,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:27:49,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386959565] [2019-11-23 20:27:49,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:27:49,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:27:49,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:49,883 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-23 20:27:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,945 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-23 20:27:49,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:27:49,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:27:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,947 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:27:49,947 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:27:49,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 20:27:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:27:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:27:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:27:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-23 20:27:49,954 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-11-23 20:27:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,954 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-23 20:27:49,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:27:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-23 20:27:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:27:49,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,955 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,159 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,159 INFO L82 PathProgramCache]: Analyzing trace with hash -873526594, now seen corresponding path program 2 times [2019-11-23 20:27:50,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843754054] [2019-11-23 20:27:50,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:27:50,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843754054] [2019-11-23 20:27:50,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930645612] [2019-11-23 20:27:50,249 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 20:27:50,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:50,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:50,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:27:50,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:27:50,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:50,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:27:50,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373401824] [2019-11-23 20:27:50,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:27:50,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:50,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:27:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:50,337 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2019-11-23 20:27:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:50,406 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2019-11-23 20:27:50,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:27:50,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 20:27:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:50,409 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:27:50,409 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:27:50,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 20:27:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:27:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:27:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:27:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-23 20:27:50,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2019-11-23 20:27:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:50,417 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-23 20:27:50,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:27:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-23 20:27:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:27:50,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:50,418 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,629 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash -778322088, now seen corresponding path program 3 times [2019-11-23 20:27:50,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318924334] [2019-11-23 20:27:50,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:27:50,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318924334] [2019-11-23 20:27:50,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491477119] [2019-11-23 20:27:50,712 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 20:27:50,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:27:50,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:50,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:27:50,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:27:50,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:50,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:27:50,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894016943] [2019-11-23 20:27:50,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:27:50,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:50,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:27:50,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:50,789 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2019-11-23 20:27:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:50,876 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-23 20:27:50,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:27:50,879 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-23 20:27:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:50,879 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:27:50,880 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:27:50,880 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 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 20:27:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:27:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 20:27:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:27:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-23 20:27:50,888 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2019-11-23 20:27:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:50,888 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-23 20:27:50,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:27:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-23 20:27:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:27:50,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:50,890 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:51,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:51,100 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1736848510, now seen corresponding path program 4 times [2019-11-23 20:27:51,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:51,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7327365] [2019-11-23 20:27:51,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:27:51,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7327365] [2019-11-23 20:27:51,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082295291] [2019-11-23 20:27:51,206 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 20:27:51,246 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:51,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:51,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:27:51,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:27:51,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:51,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:27:51,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390501367] [2019-11-23 20:27:51,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:27:51,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:51,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:27:51,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:51,269 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2019-11-23 20:27:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:51,343 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2019-11-23 20:27:51,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:27:51,344 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 20:27:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:51,345 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:27:51,345 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:27:51,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 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 20:27:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:27:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 20:27:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:27:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-23 20:27:51,352 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2019-11-23 20:27:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:51,352 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-23 20:27:51,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:27:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-23 20:27:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:27:51,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:51,353 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:51,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:51,561 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:51,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1884156648, now seen corresponding path program 5 times [2019-11-23 20:27:51,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:51,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171117564] [2019-11-23 20:27:51,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:27:51,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171117564] [2019-11-23 20:27:51,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168531018] [2019-11-23 20:27:51,677 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 20:27:51,918 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:27:51,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:51,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:27:51,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:27:51,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:51,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:27:51,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130929094] [2019-11-23 20:27:51,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:27:51,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:51,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:27:51,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:51,944 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2019-11-23 20:27:52,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:52,009 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-11-23 20:27:52,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:27:52,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-23 20:27:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:52,011 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:27:52,011 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:27:52,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 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 20:27:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:27:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:27:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:27:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-11-23 20:27:52,017 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2019-11-23 20:27:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:52,018 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-11-23 20:27:52,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:27:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-11-23 20:27:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:27:52,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:52,019 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:52,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,227 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1909780030, now seen corresponding path program 6 times [2019-11-23 20:27:52,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:52,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845098775] [2019-11-23 20:27:52,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 20:27:52,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845098775] [2019-11-23 20:27:52,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55115940] [2019-11-23 20:27:52,347 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 20:27:52,497 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:27:52,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:52,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:27:52,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 20:27:52,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:52,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:27:52,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176933159] [2019-11-23 20:27:52,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:27:52,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:27:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:52,515 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2019-11-23 20:27:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:52,584 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-23 20:27:52,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:27:52,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-23 20:27:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:52,585 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:27:52,585 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:27:52,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 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 20:27:52,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:27:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 20:27:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:27:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-23 20:27:52,597 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2019-11-23 20:27:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:52,597 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-23 20:27:52,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:27:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-23 20:27:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:27:52,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:52,598 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:52,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,804 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:52,804 INFO L82 PathProgramCache]: Analyzing trace with hash -571143464, now seen corresponding path program 7 times [2019-11-23 20:27:52,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:52,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681380771] [2019-11-23 20:27:52,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-23 20:27:52,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681380771] [2019-11-23 20:27:52,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433054799] [2019-11-23 20:27:52,950 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 20:27:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:52,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:27:53,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-23 20:27:53,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:53,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:27:53,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069555679] [2019-11-23 20:27:53,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:27:53,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:53,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:27:53,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:53,040 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2019-11-23 20:27:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:53,129 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-11-23 20:27:53,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:27:53,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-11-23 20:27:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:53,130 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:27:53,131 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:27:53,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:27:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:27:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:27:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-11-23 20:27:53,137 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2019-11-23 20:27:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:53,138 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-11-23 20:27:53,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:27:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-11-23 20:27:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:27:53,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:53,139 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:53,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,344 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1115371518, now seen corresponding path program 8 times [2019-11-23 20:27:53,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:53,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855167283] [2019-11-23 20:27:53,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:27:53,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855167283] [2019-11-23 20:27:53,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884158195] [2019-11-23 20:27:53,496 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 20:27:53,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:53,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:53,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:27:53,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:27:53,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:53,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:27:53,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41452687] [2019-11-23 20:27:53,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:27:53,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:53,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:27:53,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:53,587 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2019-11-23 20:27:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:53,655 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-11-23 20:27:53,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:27:53,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-23 20:27:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:53,656 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:27:53,656 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:27:53,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 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 20:27:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:27:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 20:27:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:27:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-11-23 20:27:53,663 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2019-11-23 20:27:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:53,663 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-11-23 20:27:53,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:27:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-11-23 20:27:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:27:53,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:53,665 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:53,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,866 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:53,867 INFO L82 PathProgramCache]: Analyzing trace with hash -953894760, now seen corresponding path program 9 times [2019-11-23 20:27:53,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:53,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029815418] [2019-11-23 20:27:53,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 20:27:53,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029815418] [2019-11-23 20:27:53,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505577906] [2019-11-23 20:27:53,996 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 20:27:54,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:27:54,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:54,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:27:54,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 20:27:54,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:54,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:27:54,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225826960] [2019-11-23 20:27:54,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:27:54,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:54,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:27:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:27:54,654 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2019-11-23 20:27:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:54,711 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2019-11-23 20:27:54,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:27:54,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-11-23 20:27:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:54,713 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:27:54,713 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:27:54,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 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 20:27:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:27:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:27:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:27:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-23 20:27:54,719 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2019-11-23 20:27:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:54,719 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-23 20:27:54,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:27:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-23 20:27:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:27:54,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:54,720 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:54,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:54,926 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash -468119106, now seen corresponding path program 10 times [2019-11-23 20:27:54,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:54,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980865176] [2019-11-23 20:27:54,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-23 20:27:55,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980865176] [2019-11-23 20:27:55,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203461609] [2019-11-23 20:27:55,060 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 20:27:55,102 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:55,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:55,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:27:55,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-23 20:27:55,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:55,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:27:55,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577076583] [2019-11-23 20:27:55,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:27:55,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:55,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:27:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:55,141 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2019-11-23 20:27:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:55,223 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2019-11-23 20:27:55,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:27:55,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-11-23 20:27:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:55,224 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:27:55,224 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:27:55,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:27:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 20:27:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:27:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-23 20:27:55,238 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2019-11-23 20:27:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:55,239 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-23 20:27:55,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:27:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-23 20:27:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:27:55,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:55,240 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:55,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:55,447 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1291774376, now seen corresponding path program 11 times [2019-11-23 20:27:55,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:55,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635462287] [2019-11-23 20:27:55,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-23 20:27:55,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635462287] [2019-11-23 20:27:55,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747978245] [2019-11-23 20:27:55,604 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 [2019-11-23 20:28:04,518 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:28:04,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:04,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:28:04,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-23 20:28:04,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:04,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:28:04,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534996449] [2019-11-23 20:28:04,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:28:04,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:28:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:28:04,551 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2019-11-23 20:28:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:04,645 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2019-11-23 20:28:04,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:28:04,645 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2019-11-23 20:28:04,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:04,646 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:28:04,646 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:28:04,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:28:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:28:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:28:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:28:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-11-23 20:28:04,654 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2019-11-23 20:28:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:04,654 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-11-23 20:28:04,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:28:04,654 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-11-23 20:28:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:28:04,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:04,655 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:04,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:04,856 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:04,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash 340687742, now seen corresponding path program 12 times [2019-11-23 20:28:04,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:04,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887111395] [2019-11-23 20:28:04,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:28:05,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887111395] [2019-11-23 20:28:05,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916925742] [2019-11-23 20:28:05,044 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:08,580 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:28:08,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:08,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:28:08,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:28:08,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:08,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:28:08,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730217719] [2019-11-23 20:28:08,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:28:08,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:08,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:28:08,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:28:08,608 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2019-11-23 20:28:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:08,693 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2019-11-23 20:28:08,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:28:08,693 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2019-11-23 20:28:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:08,694 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:28:08,694 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:28:08,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:28:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:28:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 20:28:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:28:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2019-11-23 20:28:08,701 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2019-11-23 20:28:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:08,701 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2019-11-23 20:28:08,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:28:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2019-11-23 20:28:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:28:08,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:08,702 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:08,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:08,908 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1716134936, now seen corresponding path program 13 times [2019-11-23 20:28:08,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:08,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441878662] [2019-11-23 20:28:08,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-23 20:28:09,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441878662] [2019-11-23 20:28:09,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124910587] [2019-11-23 20:28:09,091 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:09,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:28:09,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-23 20:28:09,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:09,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:28:09,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236220587] [2019-11-23 20:28:09,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:28:09,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:09,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:28:09,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:28:09,171 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2019-11-23 20:28:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:09,271 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2019-11-23 20:28:09,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:28:09,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-11-23 20:28:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:09,272 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:28:09,272 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:28:09,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 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 20:28:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:28:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:28:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:28:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2019-11-23 20:28:09,280 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2019-11-23 20:28:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:09,280 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2019-11-23 20:28:09,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:28:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2019-11-23 20:28:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:28:09,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:09,283 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:09,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,486 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1136358718, now seen corresponding path program 14 times [2019-11-23 20:28:09,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:09,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851997746] [2019-11-23 20:28:09,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:09,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851997746] [2019-11-23 20:28:09,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622936854] [2019-11-23 20:28:09,658 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:09,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:09,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:28:09,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:09,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:09,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:28:09,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729844971] [2019-11-23 20:28:09,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:28:09,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:28:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:28:09,740 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 18 states. [2019-11-23 20:28:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:09,854 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-11-23 20:28:09,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:28:09,855 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2019-11-23 20:28:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:09,856 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:28:09,856 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:28:09,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:28:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:28:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-23 20:28:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:28:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-23 20:28:09,863 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2019-11-23 20:28:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:09,864 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-23 20:28:09,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:28:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-23 20:28:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:28:09,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:09,865 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:10,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:10,077 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash 46129624, now seen corresponding path program 15 times [2019-11-23 20:28:10,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:10,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017387792] [2019-11-23 20:28:10,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-11-23 20:28:10,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017387792] [2019-11-23 20:28:10,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274997974] [2019-11-23 20:28:10,303 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:12,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:28:12,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:12,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:28:12,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-11-23 20:28:12,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:12,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:28:12,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876556674] [2019-11-23 20:28:12,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:28:12,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:28:12,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:28:12,757 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2019-11-23 20:28:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:12,879 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2019-11-23 20:28:12,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:28:12,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2019-11-23 20:28:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:12,880 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:28:12,880 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:28:12,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:28:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:28:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:28:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:28:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-11-23 20:28:12,894 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 56 [2019-11-23 20:28:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:12,894 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-11-23 20:28:12,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:28:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-11-23 20:28:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:28:12,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:12,896 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:13,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:13,102 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1778385154, now seen corresponding path program 16 times [2019-11-23 20:28:13,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:13,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674215818] [2019-11-23 20:28:13,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-11-23 20:28:13,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674215818] [2019-11-23 20:28:13,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724200529] [2019-11-23 20:28:13,305 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:13,374 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:13,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:13,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:28:13,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-11-23 20:28:13,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:13,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:28:13,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954720403] [2019-11-23 20:28:13,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:28:13,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:28:13,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:28:13,422 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 20 states. [2019-11-23 20:28:13,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:13,515 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-23 20:28:13,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:28:13,516 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2019-11-23 20:28:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:13,516 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:28:13,517 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:28:13,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:28:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:28:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-23 20:28:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:28:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2019-11-23 20:28:13,527 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2019-11-23 20:28:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:13,527 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2019-11-23 20:28:13,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:28:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2019-11-23 20:28:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:28:13,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:13,528 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:13,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:13,732 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash 119689112, now seen corresponding path program 17 times [2019-11-23 20:28:13,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:13,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907479660] [2019-11-23 20:28:13,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-11-23 20:28:13,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907479660] [2019-11-23 20:28:13,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051865402] [2019-11-23 20:28:13,960 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true