/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-crafted/mapsum1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:11:53,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:11:53,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:11:53,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:11:53,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:11:53,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:11:53,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:11:53,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:11:53,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:11:53,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:11:53,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:11:53,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:11:53,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:11:53,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:11:53,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:11:53,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:11:53,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:11:53,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:11:53,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:11:53,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:11:53,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:11:53,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:11:53,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:11:53,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:11:53,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:11:53,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:11:53,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:11:53,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:11:53,233 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 20:11:53,246 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:11:53,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:11:53,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:11:53,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:11:53,248 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:11:53,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:11:53,249 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:11:53,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:11:53,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:11:53,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:11:53,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:11:53,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:11:53,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:11:53,250 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:11:53,250 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:11:53,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:11:53,251 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:11:53,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:11:53,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:11:53,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:11:53,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:11:53,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:11:53,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:11:53,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:11:53,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:11:53,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:11:53,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:11:53,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:11:53,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:11:53,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:11:53,506 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:11:53,523 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:11:53,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:11:53,530 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:11:53,530 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:11:53,532 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum1.i [2019-11-23 20:11:53,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40a8231a/27d7ed87023644e685dca3d593b46cf1/FLAG1f3be3949 [2019-11-23 20:11:54,049 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:11:54,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum1.i [2019-11-23 20:11:54,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40a8231a/27d7ed87023644e685dca3d593b46cf1/FLAG1f3be3949 [2019-11-23 20:11:54,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40a8231a/27d7ed87023644e685dca3d593b46cf1 [2019-11-23 20:11:54,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:11:54,451 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:11:54,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:54,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:11:54,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:11:54,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577254a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54, skipping insertion in model container [2019-11-23 20:11:54,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:11:54,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:11:54,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:54,674 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:11:54,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:54,730 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:11:54,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54 WrapperNode [2019-11-23 20:11:54,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:54,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:54,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:11:54,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:11:54,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:54,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:11:54,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:11:54,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:11:54,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (1/1) ... [2019-11-23 20:11:54,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:11:54,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:11:54,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:11:54,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:11:54,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (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 20:11:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:11:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:11:54,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:11:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:11:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:11:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:11:55,290 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:11:55,291 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:11:55,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:55 BoogieIcfgContainer [2019-11-23 20:11:55,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:11:55,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:11:55,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:11:55,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:11:55,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:11:54" (1/3) ... [2019-11-23 20:11:55,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db7bac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:55, skipping insertion in model container [2019-11-23 20:11:55,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:54" (2/3) ... [2019-11-23 20:11:55,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db7bac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:55, skipping insertion in model container [2019-11-23 20:11:55,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:55" (3/3) ... [2019-11-23 20:11:55,300 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum1.i [2019-11-23 20:11:55,310 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:11:55,319 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:11:55,330 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:11:55,351 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:11:55,351 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:11:55,352 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:11:55,352 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:11:55,352 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:11:55,352 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:11:55,352 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:11:55,352 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:11:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:11:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:11:55,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,371 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:55,371 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:11:55,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:55,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954792475] [2019-11-23 20:11:55,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,542 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 20:11:55,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954792475] [2019-11-23 20:11:55,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:55,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:55,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860775542] [2019-11-23 20:11:55,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:55,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:55,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:55,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:55,564 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:11:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:55,608 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:11:55,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:55,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:11:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:55,629 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:11:55,629 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:11:55,636 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 20:11:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:11:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:11:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:11:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:11:55,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:11:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:55,699 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:11:55,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:11:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:11:55,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,703 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:55,705 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:55,706 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:11:55,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:55,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234169903] [2019-11-23 20:11:55,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:11:55,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234169903] [2019-11-23 20:11:55,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:55,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:55,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774245269] [2019-11-23 20:11:55,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:55,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:55,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:55,843 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:11:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:55,918 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:11:55,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:55,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:11:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:55,920 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:11:55,921 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:11:55,922 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 20:11:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:11:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:11:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:11:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:11:55,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:11:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:55,935 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:11:55,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:11:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:11:55,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,938 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:55,939 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:55,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:11:55,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:55,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182257897] [2019-11-23 20:11:55,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:56,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182257897] [2019-11-23 20:11:56,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:56,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:56,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130088742] [2019-11-23 20:11:56,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:56,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:56,030 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:11:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,047 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:11:56,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:56,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:11:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,049 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:11:56,049 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:11:56,050 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 20:11:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:11:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:11:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:11:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:11:56,056 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:11:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:56,057 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:11:56,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:11:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:11:56,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,058 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,059 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:11:56,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880137397] [2019-11-23 20:11:56,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:56,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880137397] [2019-11-23 20:11:56,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89286533] [2019-11-23 20:11:56,149 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 20:11:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:56,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:56,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:56,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:11:56,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061205867] [2019-11-23 20:11:56,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:11:56,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:11:56,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:11:56,257 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:11:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,281 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:11:56,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:11:56,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:11:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,283 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:11:56,283 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:11:56,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 20:11:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:11:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:11:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:11:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:11:56,289 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:11:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:56,290 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:11:56,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:11:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:11:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:11:56,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,291 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,497 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:11:56,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489794273] [2019-11-23 20:11:56,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:56,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489794273] [2019-11-23 20:11:56,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949649217] [2019-11-23 20:11:56,574 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 20:11:56,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:56,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:56,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:56,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:56,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:56,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:11:56,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537224697] [2019-11-23 20:11:56,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:11:56,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:11:56,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:56,674 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:11:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,730 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:11:56,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:11:56,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:11:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,733 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:11:56,733 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:11:56,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:11:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:11:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:11:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:11:56,739 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:11:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:56,740 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:11:56,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:11:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:11:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:11:56,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,741 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,946 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,946 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:11:56,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177677703] [2019-11-23 20:11:56,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:57,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177677703] [2019-11-23 20:11:57,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391656929] [2019-11-23 20:11:57,055 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 20:11:57,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:11:57,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:57,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:11:57,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:11:57,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383745241] [2019-11-23 20:11:57,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:11:57,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:11:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:57,134 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:11:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,240 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:11:57,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:11:57,241 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:11:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,242 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:11:57,242 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:11:57,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:11:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:11:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:11:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:11:57,249 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:11:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,249 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:11:57,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:11:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:11:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:11:57,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,251 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:57,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,452 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:11:57,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072753905] [2019-11-23 20:11:57,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:11:57,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072753905] [2019-11-23 20:11:57,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108574439] [2019-11-23 20:11:57,538 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 20:11:57,600 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:57,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:57,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:11:57,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:11:57,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481002143] [2019-11-23 20:11:57,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:11:57,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:11:57,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:57,643 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:11:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,765 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:11:57,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:57,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:11:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,767 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:11:57,768 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:11:57,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:11:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:11:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:11:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:11:57,779 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:11:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,780 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:11:57,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:11:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:11:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:11:57,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,782 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:57,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,989 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,989 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:11:57,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910914866] [2019-11-23 20:11:57,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:11:58,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910914866] [2019-11-23 20:11:58,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535706516] [2019-11-23 20:11:58,124 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 20:11:58,208 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:11:58,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:58,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:11:58,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:11:58,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:58,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:11:58,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844187546] [2019-11-23 20:11:58,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:58,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:58,271 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:11:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:58,367 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:11:58,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:58,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:11:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:58,369 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:11:58,371 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:11:58,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:11:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:11:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:11:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:11:58,383 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:11:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:58,385 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:11:58,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:11:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:11:58,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:58,386 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:58,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,591 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:11:58,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298419909] [2019-11-23 20:11:58,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:11:58,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298419909] [2019-11-23 20:11:58,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813806293] [2019-11-23 20:11:58,688 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 20:11:58,757 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:11:58,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:58,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:58,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:11:58,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:58,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:11:58,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125263514] [2019-11-23 20:11:58,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:58,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:58,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:58,805 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:11:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:58,866 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:11:58,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:58,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:11:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:58,867 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:11:58,868 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:11:58,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:11:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:11:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:11:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:11:58,881 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:11:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:58,881 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:11:58,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:11:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:11:58,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:58,884 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:59,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,090 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:59,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:59,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:11:59,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:59,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062665707] [2019-11-23 20:11:59,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:59,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062665707] [2019-11-23 20:11:59,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931483372] [2019-11-23 20:11:59,189 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 20:11:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:11:59,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:59,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:59,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:11:59,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471294133] [2019-11-23 20:11:59,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:11:59,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:59,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:11:59,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:11:59,292 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:11:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:59,329 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:11:59,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:59,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:11:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:59,331 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:11:59,331 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:11:59,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:11:59,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:11:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:11:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:11:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:11:59,344 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:11:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:59,344 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:11:59,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:11:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:11:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:11:59,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:59,346 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:59,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,547 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:59,547 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:11:59,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:59,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449263302] [2019-11-23 20:11:59,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:59,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449263302] [2019-11-23 20:11:59,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876394906] [2019-11-23 20:11:59,687 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 20:11:59,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:59,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:59,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:11:59,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:59,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:59,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:11:59,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306158505] [2019-11-23 20:11:59,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:59,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:59,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:59,811 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:11:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:59,844 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:11:59,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:11:59,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:11:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:59,845 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:11:59,845 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:11:59,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 20:11:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:11:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:11:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:11:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:11:59,855 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:11:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:59,855 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:11:59,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:11:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:11:59,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:59,856 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:00,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,069 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:00,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:12:00,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:00,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158904149] [2019-11-23 20:12:00,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:12:00,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158904149] [2019-11-23 20:12:00,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837470513] [2019-11-23 20:12:00,189 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 20:12:00,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:12:00,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:00,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:12:00,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:12:00,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:00,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:12:00,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76917838] [2019-11-23 20:12:00,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:12:00,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:12:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:12:00,310 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:12:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:00,380 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:12:00,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:12:00,381 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:12:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:00,382 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:12:00,382 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:12:00,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:12:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:12:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:12:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:12:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:12:00,394 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:12:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:00,394 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:12:00,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:12:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:12:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:12:00,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:00,401 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:00,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,602 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:00,603 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:12:00,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:00,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888107360] [2019-11-23 20:12:00,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:12:00,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888107360] [2019-11-23 20:12:00,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590412576] [2019-11-23 20:12:00,730 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 20:12:00,810 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:00,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:00,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:12:00,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:12:00,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:00,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:12:00,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926648639] [2019-11-23 20:12:00,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:12:00,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:00,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:12:00,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:12:00,845 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:12:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:00,888 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:12:00,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:12:00,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:12:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:00,889 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:12:00,890 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:12:00,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:12:00,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:12:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:12:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:12:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:12:00,901 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:12:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:00,901 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:12:00,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:12:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:12:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:12:00,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:00,902 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:01,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,106 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:12:01,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:01,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822485114] [2019-11-23 20:12:01,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:12:01,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822485114] [2019-11-23 20:12:01,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901963046] [2019-11-23 20:12:01,250 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 20:12:01,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:12:01,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:01,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:12:01,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:12:01,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:01,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:12:01,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915823591] [2019-11-23 20:12:01,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:12:01,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:12:01,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:12:01,630 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:12:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:01,769 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 20:12:01,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:12:01,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:12:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:01,771 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:12:01,771 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:12:01,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:12:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:12:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 20:12:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:12:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:12:01,778 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 20:12:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:01,779 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:12:01,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:12:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:12:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:12:01,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:01,780 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:01,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,981 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:01,981 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 20:12:01,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:01,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832129108] [2019-11-23 20:12:01,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:12:02,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832129108] [2019-11-23 20:12:02,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675140492] [2019-11-23 20:12:02,151 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 20:12:02,432 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:12:02,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:02,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:12:02,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 20:12:02,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:02,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:12:02,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718060330] [2019-11-23 20:12:02,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:12:02,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:02,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:12:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:12:02,523 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:12:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:02,583 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 20:12:02,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:12:02,583 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 20:12:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:02,584 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:12:02,584 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:12:02,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:12:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:12:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:12:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:12:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:12:02,598 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 20:12:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:02,598 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:12:02,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:12:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:12:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:12:02,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:02,599 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:02,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:02,800 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:12:02,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:02,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543899417] [2019-11-23 20:12:02,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:02,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543899417] [2019-11-23 20:12:02,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383861599] [2019-11-23 20:12:02,949 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 20:12:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:03,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:12:03,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:03,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:03,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:12:03,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909555304] [2019-11-23 20:12:03,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:12:03,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:03,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:12:03,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:12:03,062 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:12:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:03,137 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:12:03,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:12:03,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:12:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:03,138 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:12:03,138 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:12:03,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 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 20:12:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:12:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:12:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:12:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:12:03,145 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:12:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:03,145 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:12:03,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:12:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:12:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:12:03,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:03,147 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:03,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:03,352 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:12:03,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:03,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529752217] [2019-11-23 20:12:03,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:03,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529752217] [2019-11-23 20:12:03,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660010352] [2019-11-23 20:12:03,623 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 20:12:03,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:03,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:03,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:12:03,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:03,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:03,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:12:03,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811079361] [2019-11-23 20:12:03,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:12:03,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:12:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:12:03,738 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:12:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:03,784 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:12:03,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:12:03,784 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:12:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:03,785 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:12:03,785 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:12:03,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 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 20:12:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:12:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:12:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:12:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:12:03,793 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:12:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:03,795 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:12:03,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:12:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:12:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:12:03,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:03,796 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:03,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:04,000 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:12:04,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:04,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48562825] [2019-11-23 20:12:04,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:04,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48562825] [2019-11-23 20:12:04,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786209928] [2019-11-23 20:12:04,204 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 20:12:04,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:12:04,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:04,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:04,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:12:04,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:04,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:12:04,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340129884] [2019-11-23 20:12:04,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:04,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:04,396 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:12:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:04,492 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:12:04,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:12:04,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:12:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:04,493 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:12:04,493 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:12:04,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:12:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:12:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:12:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:12:04,497 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:12:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:04,498 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:12:04,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:12:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:12:04,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:04,499 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:04,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:04,703 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:04,703 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:12:04,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:04,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999182368] [2019-11-23 20:12:04,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:12:04,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999182368] [2019-11-23 20:12:04,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459581544] [2019-11-23 20:12:04,903 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 20:12:04,978 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:04,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:04,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:04,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:12:05,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:05,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:12:05,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860658781] [2019-11-23 20:12:05,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:12:05,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:05,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:12:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:05,091 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:12:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:05,268 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:12:05,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:12:05,268 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:12:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:05,269 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:12:05,269 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:12:05,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:12:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:12:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:12:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:12:05,272 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:12:05,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:05,272 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:12:05,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:12:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:12:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:12:05,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:05,274 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:05,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:05,477 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:05,478 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:12:05,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:05,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802130769] [2019-11-23 20:12:05,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:12:05,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802130769] [2019-11-23 20:12:05,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173984078] [2019-11-23 20:12:05,690 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 [2019-11-23 20:12:06,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:12:06,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:06,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:12:06,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 20:12:06,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:06,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:12:06,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403178520] [2019-11-23 20:12:06,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:12:06,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:06,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:12:06,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:06,244 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:12:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:06,466 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:12:06,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:12:06,467 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:12:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:06,468 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:12:06,469 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:12:06,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:12:06,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:12:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:12:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:12:06,474 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:12:06,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:06,474 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:12:06,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:12:06,474 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:12:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:12:06,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:06,475 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:06,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:06,676 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:06,677 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:12:06,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:06,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802945847] [2019-11-23 20:12:06,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:06,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802945847] [2019-11-23 20:12:06,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156749112] [2019-11-23 20:12:06,890 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,466 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:12:07,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:07,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:12:07,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:12:07,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:07,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:12:07,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655396664] [2019-11-23 20:12:07,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:12:07,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:12:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:07,582 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:12:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:07,680 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:12:07,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:12:07,681 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:12:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:07,681 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:12:07,682 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:12:07,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:12:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:12:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:12:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:12:07,686 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:12:07,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:07,686 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:12:07,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:12:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:12:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:12:07,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:07,687 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:07,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,892 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:07,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:12:07,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:07,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691563894] [2019-11-23 20:12:07,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:08,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691563894] [2019-11-23 20:12:08,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206023386] [2019-11-23 20:12:08,162 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:08,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:12:08,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:08,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:08,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:12:08,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005317803] [2019-11-23 20:12:08,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:12:08,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:08,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:12:08,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:12:08,273 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:12:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:08,342 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:12:08,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:12:08,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:12:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:08,344 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:12:08,344 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:12:08,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:12:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:12:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:12:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:12:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:12:08,349 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:12:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:08,349 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:12:08,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:12:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:12:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:12:08,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:08,350 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:08,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:08,554 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:08,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:12:08,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:08,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133391098] [2019-11-23 20:12:08,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:08,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133391098] [2019-11-23 20:12:08,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598652443] [2019-11-23 20:12:08,889 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:08,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:08,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:08,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:12:08,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:08,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:08,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:12:08,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177419336] [2019-11-23 20:12:08,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:08,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:08,993 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:12:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:09,080 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:12:09,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:12:09,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:12:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:09,085 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:12:09,085 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:12:09,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:12:09,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:12:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:12:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:12:09,092 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:12:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:09,092 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:12:09,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:09,092 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:12:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:12:09,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:09,093 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:09,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:09,304 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:09,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:12:09,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:09,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916222696] [2019-11-23 20:12:09,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:09,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916222696] [2019-11-23 20:12:09,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980250932] [2019-11-23 20:12:09,586 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:09,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:12:09,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:09,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:12:09,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-23 20:12:09,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:09,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:12:09,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165983533] [2019-11-23 20:12:09,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:12:09,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:12:09,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:09,872 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 20:12:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:10,151 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2019-11-23 20:12:10,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:12:10,152 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 20:12:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:10,153 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:12:10,153 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:12:10,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:10,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:12:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2019-11-23 20:12:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:12:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 20:12:10,159 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2019-11-23 20:12:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:10,159 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 20:12:10,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:12:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 20:12:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:12:10,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:10,160 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:10,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:10,365 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1756079898, now seen corresponding path program 22 times [2019-11-23 20:12:10,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:10,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381480884] [2019-11-23 20:12:10,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:10,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381480884] [2019-11-23 20:12:10,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364184953] [2019-11-23 20:12:10,745 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:10,822 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:10,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:10,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:12:10,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:10,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:10,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:12:10,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084597925] [2019-11-23 20:12:10,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:12:10,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:10,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:12:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:12:10,849 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 26 states. [2019-11-23 20:12:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:10,938 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:12:10,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:12:10,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-23 20:12:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:10,939 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:12:10,939 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:12:10,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:12:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:12:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 20:12:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:12:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:12:10,944 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2019-11-23 20:12:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:10,944 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:12:10,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:12:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:12:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:12:10,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:10,946 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:11,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:11,150 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:11,151 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 23 times [2019-11-23 20:12:11,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:11,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574217675] [2019-11-23 20:12:11,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:11,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574217675] [2019-11-23 20:12:11,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541536525] [2019-11-23 20:12:11,578 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:15,523 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:12:15,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:15,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:12:15,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-23 20:12:15,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:15,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:12:15,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779263305] [2019-11-23 20:12:15,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:12:15,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:15,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:12:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:15,700 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 35 states. [2019-11-23 20:12:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:16,023 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2019-11-23 20:12:16,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:12:16,023 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 125 [2019-11-23 20:12:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:16,025 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:12:16,025 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:12:16,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:12:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-23 20:12:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:12:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:12:16,031 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2019-11-23 20:12:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:16,031 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:12:16,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:12:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:12:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:12:16,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:16,032 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:16,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:16,239 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:16,240 INFO L82 PathProgramCache]: Analyzing trace with hash 613383828, now seen corresponding path program 24 times [2019-11-23 20:12:16,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:16,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095261586] [2019-11-23 20:12:16,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 20:12:16,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095261586] [2019-11-23 20:12:16,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201275721] [2019-11-23 20:12:16,615 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:17,325 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:12:17,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:17,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:12:17,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-11-23 20:12:17,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:17,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-23 20:12:17,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725201580] [2019-11-23 20:12:17,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:12:17,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:12:17,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:17,472 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 35 states. [2019-11-23 20:12:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:17,619 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2019-11-23 20:12:17,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:12:17,621 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2019-11-23 20:12:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:17,622 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:12:17,622 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:12:17,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:12:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-23 20:12:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:12:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:12:17,627 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 133 [2019-11-23 20:12:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:17,627 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:12:17,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:12:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:12:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:12:17,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:17,628 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:17,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:17,833 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash 2095840464, now seen corresponding path program 25 times [2019-11-23 20:12:17,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:17,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255718557] [2019-11-23 20:12:17,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:18,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255718557] [2019-11-23 20:12:18,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603623673] [2019-11-23 20:12:18,271 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:18,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:12:18,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:18,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:18,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:12:18,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116810955] [2019-11-23 20:12:18,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:12:18,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:18,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:12:18,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:12:18,412 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 29 states. [2019-11-23 20:12:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:18,490 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2019-11-23 20:12:18,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:12:18,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2019-11-23 20:12:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:18,492 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:12:18,492 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:12:18,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:12:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:12:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-23 20:12:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:12:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 20:12:18,497 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2019-11-23 20:12:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:18,497 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 20:12:18,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:12:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 20:12:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:12:18,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:18,499 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:18,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:18,702 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash -624080370, now seen corresponding path program 26 times [2019-11-23 20:12:18,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:18,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863659329] [2019-11-23 20:12:18,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:19,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863659329] [2019-11-23 20:12:19,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490404561] [2019-11-23 20:12:19,352 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:19,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:19,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:19,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:12:19,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:19,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:19,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:12:19,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440433032] [2019-11-23 20:12:19,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:12:19,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:19,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:12:19,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:12:19,554 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 30 states. [2019-11-23 20:12:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:19,653 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2019-11-23 20:12:19,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:12:19,653 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-23 20:12:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:19,654 INFO L225 Difference]: With dead ends: 228 [2019-11-23 20:12:19,654 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:12:19,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:12:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:12:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 20:12:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:12:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 20:12:19,662 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2019-11-23 20:12:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:19,662 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 20:12:19,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:12:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 20:12:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 20:12:19,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:19,664 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:19,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:19,868 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:19,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1167081420, now seen corresponding path program 27 times [2019-11-23 20:12:19,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:19,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246317930] [2019-11-23 20:12:19,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:20,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246317930] [2019-11-23 20:12:20,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643970359] [2019-11-23 20:12:20,371 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:20,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:12:20,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:20,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:12:20,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-11-23 20:12:20,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:20,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2019-11-23 20:12:20,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914012732] [2019-11-23 20:12:20,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:12:20,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:20,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:12:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:12:20,766 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 39 states. [2019-11-23 20:12:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:20,942 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2019-11-23 20:12:20,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:12:20,943 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 141 [2019-11-23 20:12:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:20,944 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:12:20,944 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:12:20,945 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:12:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:12:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2019-11-23 20:12:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:12:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:12:20,948 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 141 [2019-11-23 20:12:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:20,948 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:12:20,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:12:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:12:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:12:20,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:20,949 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:21,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:21,154 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1782074872, now seen corresponding path program 28 times [2019-11-23 20:12:21,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:21,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021684487] [2019-11-23 20:12:21,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:12:21,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021684487] [2019-11-23 20:12:21,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573922788] [2019-11-23 20:12:21,725 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:21,858 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:21,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:21,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:12:21,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:12:21,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:21,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:12:21,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889140366] [2019-11-23 20:12:21,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:12:21,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:21,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:12:21,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:21,924 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 32 states. [2019-11-23 20:12:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:22,016 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2019-11-23 20:12:22,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:12:22,016 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2019-11-23 20:12:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:22,017 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:12:22,017 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:12:22,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:12:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:12:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:12:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:12:22,022 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:12:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:22,022 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:12:22,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:12:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:12:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:12:22,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:22,023 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:22,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:22,224 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 29 times [2019-11-23 20:12:22,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:22,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680638678] [2019-11-23 20:12:22,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:12:22,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680638678] [2019-11-23 20:12:22,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477931571] [2019-11-23 20:12:22,658 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:25,641 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:12:25,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:25,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:25,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2019-11-23 20:12:25,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:25,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 20:12:25,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176774369] [2019-11-23 20:12:25,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:12:25,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:12:25,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:12:25,828 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 42 states. [2019-11-23 20:12:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:26,192 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2019-11-23 20:12:26,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:12:26,192 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 147 [2019-11-23 20:12:26,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:26,194 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:12:26,194 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:12:26,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:12:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:12:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 20:12:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:12:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 20:12:26,200 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 20:12:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:26,200 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 20:12:26,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:12:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 20:12:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:12:26,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:26,202 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:26,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:26,409 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:26,409 INFO L82 PathProgramCache]: Analyzing trace with hash 300865538, now seen corresponding path program 30 times [2019-11-23 20:12:26,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:26,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50782631] [2019-11-23 20:12:26,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:26,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50782631] [2019-11-23 20:12:26,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569544946] [2019-11-23 20:12:26,922 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:29,233 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:12:29,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:29,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:29,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-11-23 20:12:29,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:29,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 20:12:29,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731025833] [2019-11-23 20:12:29,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:12:29,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:29,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:12:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:29,415 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 20:12:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:29,617 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2019-11-23 20:12:29,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:12:29,617 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 20:12:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:29,619 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:12:29,619 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:12:29,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:12:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 20:12:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:12:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:12:29,625 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 20:12:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:29,625 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:12:29,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:12:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:12:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:12:29,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:29,626 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:29,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:29,833 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:29,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1309958206, now seen corresponding path program 31 times [2019-11-23 20:12:29,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:29,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834235561] [2019-11-23 20:12:29,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:30,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834235561] [2019-11-23 20:12:30,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853908930] [2019-11-23 20:12:30,392 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:30,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:12:30,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:30,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:30,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:12:30,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165683804] [2019-11-23 20:12:30,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:12:30,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:12:30,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:30,530 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 35 states. [2019-11-23 20:12:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:30,643 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:12:30,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:12:30,643 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2019-11-23 20:12:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:30,644 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:12:30,645 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:12:30,645 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:12:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:12:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:12:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:12:30,650 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:12:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:30,650 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:12:30,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:12:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:12:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:12:30,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:30,652 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:30,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:30,855 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:30,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2142172420, now seen corresponding path program 32 times [2019-11-23 20:12:30,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:30,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197928973] [2019-11-23 20:12:30,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:31,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197928973] [2019-11-23 20:12:31,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060976803] [2019-11-23 20:12:31,558 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:31,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:31,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:31,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:12:31,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:31,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:31,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:12:31,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243992678] [2019-11-23 20:12:31,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:12:31,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:31,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:12:31,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:31,744 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 36 states. [2019-11-23 20:12:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:31,855 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-11-23 20:12:31,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:12:31,856 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2019-11-23 20:12:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:31,857 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:12:31,857 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:12:31,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:12:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:12:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:12:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:12:31,863 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:12:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:31,863 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:12:31,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:12:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:12:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:12:31,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:31,864 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:32,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:32,069 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash 370015802, now seen corresponding path program 33 times [2019-11-23 20:12:32,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:32,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622353320] [2019-11-23 20:12:32,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:32,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622353320] [2019-11-23 20:12:32,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077424802] [2019-11-23 20:12:32,601 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:32,849 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:12:32,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:32,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:12:32,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2019-11-23 20:12:33,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:33,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2019-11-23 20:12:33,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093593670] [2019-11-23 20:12:33,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:12:33,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:33,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:12:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:12:33,093 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 20:12:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:33,485 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2019-11-23 20:12:33,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:12:33,485 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 20:12:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:33,487 INFO L225 Difference]: With dead ends: 271 [2019-11-23 20:12:33,487 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:12:33,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:12:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:12:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2019-11-23 20:12:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:12:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2019-11-23 20:12:33,492 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2019-11-23 20:12:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:33,492 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2019-11-23 20:12:33,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:12:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2019-11-23 20:12:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:12:33,493 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:33,493 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:33,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:33,694 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:33,694 INFO L82 PathProgramCache]: Analyzing trace with hash -257617674, now seen corresponding path program 34 times [2019-11-23 20:12:33,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:33,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114697223] [2019-11-23 20:12:33,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:12:34,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114697223] [2019-11-23 20:12:34,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746359635] [2019-11-23 20:12:34,224 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:34,331 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:34,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:34,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:12:34,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2019-11-23 20:12:34,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:34,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2019-11-23 20:12:34,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006024469] [2019-11-23 20:12:34,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:12:34,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:34,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:12:34,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:34,588 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 49 states. [2019-11-23 20:12:34,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:34,957 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-11-23 20:12:34,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:12:34,957 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2019-11-23 20:12:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:34,958 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:12:34,958 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:12:34,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:12:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2019-11-23 20:12:34,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 20:12:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 20:12:34,965 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2019-11-23 20:12:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:34,965 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 20:12:34,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:12:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 20:12:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 20:12:34,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:34,967 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:35,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:35,170 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:35,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1138775886, now seen corresponding path program 35 times [2019-11-23 20:12:35,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:35,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411828357] [2019-11-23 20:12:35,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:12:35,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411828357] [2019-11-23 20:12:35,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763817851] [2019-11-23 20:12:35,769 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:13,161 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:13:13,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:13,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:13:13,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1613 trivial. 0 not checked. [2019-11-23 20:13:13,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:13,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 15] total 51 [2019-11-23 20:13:13,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918086206] [2019-11-23 20:13:13,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:13:13,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:13:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:13:13,445 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 51 states. [2019-11-23 20:13:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:13,869 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2019-11-23 20:13:13,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:13:13,869 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 179 [2019-11-23 20:13:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:13,871 INFO L225 Difference]: With dead ends: 299 [2019-11-23 20:13:13,871 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:13:13,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:13:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:13:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2019-11-23 20:13:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:13:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 20:13:13,877 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2019-11-23 20:13:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:13,878 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 20:13:13,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:13:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 20:13:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 20:13:13,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:13,879 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 13, 13, 13, 13, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:14,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:14,080 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash -556563090, now seen corresponding path program 36 times [2019-11-23 20:13:14,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:14,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445100982] [2019-11-23 20:13:14,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2019-11-23 20:13:14,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445100982] [2019-11-23 20:13:14,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017811358] [2019-11-23 20:13:14,732 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:22,149 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:13:22,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:22,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:13:22,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1803 trivial. 0 not checked. [2019-11-23 20:13:22,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:22,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2019-11-23 20:13:22,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024946264] [2019-11-23 20:13:22,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:13:22,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:22,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:13:22,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:13:22,397 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 50 states. [2019-11-23 20:13:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:22,639 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2019-11-23 20:13:22,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:13:22,640 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 187 [2019-11-23 20:13:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:22,641 INFO L225 Difference]: With dead ends: 307 [2019-11-23 20:13:22,641 INFO L226 Difference]: Without dead ends: 194 [2019-11-23 20:13:22,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:13:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-23 20:13:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2019-11-23 20:13:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:13:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 20:13:22,646 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 187 [2019-11-23 20:13:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:22,646 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 20:13:22,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:13:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 20:13:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 20:13:22,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:22,648 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:22,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:22,855 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:22,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1061272234, now seen corresponding path program 37 times [2019-11-23 20:13:22,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:22,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758506616] [2019-11-23 20:13:22,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:23,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758506616] [2019-11-23 20:13:23,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195175277] [2019-11-23 20:13:23,759 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:23,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:13:23,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:23,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:23,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:13:23,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617032362] [2019-11-23 20:13:23,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:13:23,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:13:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:13:23,925 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 41 states. [2019-11-23 20:13:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:24,060 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2019-11-23 20:13:24,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:13:24,065 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2019-11-23 20:13:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:24,066 INFO L225 Difference]: With dead ends: 310 [2019-11-23 20:13:24,066 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:13:24,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:13:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:13:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 20:13:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:13:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 20:13:24,072 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2019-11-23 20:13:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:24,073 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 20:13:24,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:13:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 20:13:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:13:24,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:24,074 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:24,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:24,278 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash 712240488, now seen corresponding path program 38 times [2019-11-23 20:13:24,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:24,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754761004] [2019-11-23 20:13:24,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:25,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754761004] [2019-11-23 20:13:25,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240637825] [2019-11-23 20:13:25,327 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:25,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:25,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:25,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:13:25,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:25,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:25,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:13:25,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749332544] [2019-11-23 20:13:25,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:13:25,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:25,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:13:25,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:13:25,491 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 42 states. [2019-11-23 20:13:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:25,630 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2019-11-23 20:13:25,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:13:25,630 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 193 [2019-11-23 20:13:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:25,632 INFO L225 Difference]: With dead ends: 312 [2019-11-23 20:13:25,632 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 20:13:25,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:13:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 20:13:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 20:13:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 20:13:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 20:13:25,645 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2019-11-23 20:13:25,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:25,646 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 20:13:25,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:13:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 20:13:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 20:13:25,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:25,647 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:25,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:25,852 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:25,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:25,852 INFO L82 PathProgramCache]: Analyzing trace with hash 300181670, now seen corresponding path program 39 times [2019-11-23 20:13:25,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:25,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905236909] [2019-11-23 20:13:25,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:26,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905236909] [2019-11-23 20:13:26,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396999762] [2019-11-23 20:13:26,849 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:27,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:13:27,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:27,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:13:27,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-11-23 20:13:27,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:27,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2019-11-23 20:13:27,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406155643] [2019-11-23 20:13:27,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:13:27,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:27,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:13:27,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:13:27,612 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 54 states. [2019-11-23 20:13:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:27,882 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-11-23 20:13:27,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:13:27,883 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 195 [2019-11-23 20:13:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:27,884 INFO L225 Difference]: With dead ends: 317 [2019-11-23 20:13:27,884 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:13:27,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:13:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:13:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-23 20:13:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 20:13:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 20:13:27,889 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 195 [2019-11-23 20:13:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:27,889 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 20:13:27,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:13:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 20:13:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 20:13:27,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:27,891 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:28,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:28,096 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1362128414, now seen corresponding path program 40 times [2019-11-23 20:13:28,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:28,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626703620] [2019-11-23 20:13:28,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:13:28,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626703620] [2019-11-23 20:13:28,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633205301] [2019-11-23 20:13:28,913 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:29,031 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:29,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:29,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:13:29,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2019-11-23 20:13:29,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:29,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 15] total 56 [2019-11-23 20:13:29,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615954645] [2019-11-23 20:13:29,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:13:29,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:29,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:13:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:13:29,339 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 56 states. [2019-11-23 20:13:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:29,615 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2019-11-23 20:13:29,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:13:29,616 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 199 [2019-11-23 20:13:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:29,618 INFO L225 Difference]: With dead ends: 323 [2019-11-23 20:13:29,618 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:13:29,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:13:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:13:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2019-11-23 20:13:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 20:13:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2019-11-23 20:13:29,624 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 199 [2019-11-23 20:13:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:29,624 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2019-11-23 20:13:29,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:13:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2019-11-23 20:13:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 20:13:29,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:29,626 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:29,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:29,829 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:29,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2033644258, now seen corresponding path program 41 times [2019-11-23 20:13:29,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:29,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437531437] [2019-11-23 20:13:29,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 20:13:30,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437531437] [2019-11-23 20:13:30,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842872248] [2019-11-23 20:13:30,640 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true