/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:18:49,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:18:49,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:18:49,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:18:49,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:18:49,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:18:49,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:18:49,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:18:49,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:18:49,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:18:49,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:18:49,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:18:49,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:18:49,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:18:49,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:18:49,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:18:49,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:18:49,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:18:49,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:18:49,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:18:49,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:18:49,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:18:49,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:18:49,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:18:49,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:18:49,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:18:49,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:18:49,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:18:49,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:18:49,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:18:49,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:18:49,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:18:49,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:18:49,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:18:49,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:18:49,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:18:49,237 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 20:18:49,255 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:18:49,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:18:49,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:18:49,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:18:49,259 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:18:49,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:18:49,259 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:18:49,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:18:49,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:18:49,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:18:49,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:18:49,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:18:49,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:18:49,260 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:18:49,260 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:18:49,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:18:49,261 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:18:49,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:18:49,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:18:49,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:18:49,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:18:49,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:18:49,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:18:49,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:18:49,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:18:49,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:18:49,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:18:49,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:18:49,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:18:49,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:18:49,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:18:49,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:18:49,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:18:49,548 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:18:49,548 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:18:49,549 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-11-23 20:18:49,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed5d4e35c/d4f73170be5c4a42ab69a8c4c5989fea/FLAGba49588aa [2019-11-23 20:18:50,084 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:18:50,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-11-23 20:18:50,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed5d4e35c/d4f73170be5c4a42ab69a8c4c5989fea/FLAGba49588aa [2019-11-23 20:18:50,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed5d4e35c/d4f73170be5c4a42ab69a8c4c5989fea [2019-11-23 20:18:50,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:18:50,446 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:18:50,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:50,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:18:50,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:18:50,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba3616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50, skipping insertion in model container [2019-11-23 20:18:50,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:18:50,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:18:50,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:50,704 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:18:50,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:50,743 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:18:50,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50 WrapperNode [2019-11-23 20:18:50,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:50,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:50,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:18:50,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:18:50,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:50,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:18:50,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:18:50,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:18:50,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (1/1) ... [2019-11-23 20:18:50,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:18:50,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:18:50,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:18:50,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:18:50,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (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 20:18:50,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:18:50,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:18:50,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:18:50,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:18:50,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:18:50,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:18:51,168 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:18:51,169 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:18:51,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:51 BoogieIcfgContainer [2019-11-23 20:18:51,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:18:51,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:18:51,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:18:51,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:18:51,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:18:50" (1/3) ... [2019-11-23 20:18:51,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75408ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:51, skipping insertion in model container [2019-11-23 20:18:51,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:50" (2/3) ... [2019-11-23 20:18:51,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75408ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:51, skipping insertion in model container [2019-11-23 20:18:51,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:51" (3/3) ... [2019-11-23 20:18:51,195 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2019-11-23 20:18:51,213 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:18:51,223 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:18:51,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:18:51,261 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:18:51,261 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:18:51,261 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:18:51,261 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:18:51,262 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:18:51,262 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:18:51,262 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:18:51,262 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:18:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-23 20:18:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:18:51,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:51,279 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:51,280 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:51,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2006137184, now seen corresponding path program 1 times [2019-11-23 20:18:51,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:51,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133423293] [2019-11-23 20:18:51,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:51,398 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 20:18:51,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133423293] [2019-11-23 20:18:51,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:51,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:18:51,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560494228] [2019-11-23 20:18:51,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:18:51,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:51,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:18:51,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:18:51,423 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-23 20:18:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:51,439 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2019-11-23 20:18:51,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:18:51,440 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:18:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:51,448 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:18:51,448 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:18:51,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:18:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:18:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:18:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:18:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 20:18:51,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2019-11-23 20:18:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:51,487 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 20:18:51,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:18:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 20:18:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:18:51,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:51,489 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:51,489 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2016295915, now seen corresponding path program 1 times [2019-11-23 20:18:51,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:51,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539155886] [2019-11-23 20:18:51,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:51,546 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 20:18:51,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539155886] [2019-11-23 20:18:51,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:51,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:51,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816680020] [2019-11-23 20:18:51,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:51,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:51,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:51,552 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2019-11-23 20:18:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:51,592 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-11-23 20:18:51,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:51,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:18:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:51,593 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:18:51,594 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:18:51,595 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 20:18:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:18:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-23 20:18:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:18:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-23 20:18:51,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2019-11-23 20:18:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:51,600 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-23 20:18:51,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-23 20:18:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:18:51,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:51,602 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:51,602 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:51,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:51,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1564799315, now seen corresponding path program 1 times [2019-11-23 20:18:51,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:51,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124783694] [2019-11-23 20:18:51,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:51,649 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 20:18:51,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124783694] [2019-11-23 20:18:51,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:51,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:51,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833616980] [2019-11-23 20:18:51,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:51,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:51,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:51,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:51,652 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-11-23 20:18:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:51,683 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-23 20:18:51,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:51,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:18:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:51,685 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:18:51,685 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:18:51,686 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 20:18:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:18:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-23 20:18:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:18:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:18:51,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-23 20:18:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:51,691 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:18:51,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:18:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:18:51,692 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:51,693 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:51,693 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash -324137903, now seen corresponding path program 1 times [2019-11-23 20:18:51,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:51,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769664831] [2019-11-23 20:18:51,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:51,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769664831] [2019-11-23 20:18:51,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135018636] [2019-11-23 20:18:51,759 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 20:18:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:51,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:51,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:51,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:51,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:18:51,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332535573] [2019-11-23 20:18:51,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:18:51,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:18:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:51,867 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-23 20:18:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:51,916 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-11-23 20:18:51,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:18:51,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:18:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:51,917 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:18:51,917 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:18:51,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:18:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2019-11-23 20:18:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:18:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 20:18:51,923 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2019-11-23 20:18:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:51,923 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 20:18:51,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:18:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 20:18:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:18:51,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:51,924 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:52,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:52,132 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:52,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1157925421, now seen corresponding path program 2 times [2019-11-23 20:18:52,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:52,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979995368] [2019-11-23 20:18:52,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:52,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979995368] [2019-11-23 20:18:52,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394387481] [2019-11-23 20:18:52,197 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:18:52,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:52,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:52,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:52,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:52,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:52,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:18:52,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349425931] [2019-11-23 20:18:52,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:18:52,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:52,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:18:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:52,259 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2019-11-23 20:18:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:52,343 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2019-11-23 20:18:52,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:18:52,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-23 20:18:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:52,345 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:18:52,345 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:18:52,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:18:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-23 20:18:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:18:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:18:52,355 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-11-23 20:18:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:52,357 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:18:52,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:18:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:18:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:18:52,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:52,358 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:52,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:52,560 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1946849393, now seen corresponding path program 3 times [2019-11-23 20:18:52,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:52,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759959537] [2019-11-23 20:18:52,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:52,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759959537] [2019-11-23 20:18:52,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573228858] [2019-11-23 20:18:52,640 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 20:18:52,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:18:52,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:52,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:52,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:18:52,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:52,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-11-23 20:18:52,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740806919] [2019-11-23 20:18:52,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:18:52,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:18:52,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:52,733 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2019-11-23 20:18:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:52,806 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2019-11-23 20:18:52,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:18:52,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-23 20:18:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:52,809 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:18:52,809 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:18:52,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:18:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-11-23 20:18:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:18:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-23 20:18:52,819 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 21 [2019-11-23 20:18:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:52,819 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-23 20:18:52,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:18:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-23 20:18:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:18:52,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:52,820 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:53,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:53,023 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1260321897, now seen corresponding path program 4 times [2019-11-23 20:18:53,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:53,025 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206797024] [2019-11-23 20:18:53,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:53,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206797024] [2019-11-23 20:18:53,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807065391] [2019-11-23 20:18:53,105 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 20:18:53,149 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:53,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:53,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:53,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:53,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:53,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:18:53,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316777128] [2019-11-23 20:18:53,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:18:53,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:18:53,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:53,175 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2019-11-23 20:18:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:53,246 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2019-11-23 20:18:53,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:18:53,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-23 20:18:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:53,247 INFO L225 Difference]: With dead ends: 55 [2019-11-23 20:18:53,248 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:18:53,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:18:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-11-23 20:18:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:18:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-23 20:18:53,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2019-11-23 20:18:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:53,255 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-23 20:18:53,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:18:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-23 20:18:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:18:53,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:53,256 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:53,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:53,459 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:53,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1241135669, now seen corresponding path program 5 times [2019-11-23 20:18:53,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:53,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766911639] [2019-11-23 20:18:53,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:18:53,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766911639] [2019-11-23 20:18:53,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026160840] [2019-11-23 20:18:53,585 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 20:18:53,647 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:18:53,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:53,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:53,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:18:53,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:53,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-11-23 20:18:53,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597351526] [2019-11-23 20:18:53,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:18:53,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:18:53,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:53,668 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 8 states. [2019-11-23 20:18:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:53,728 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2019-11-23 20:18:53,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:18:53,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-11-23 20:18:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:53,729 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:18:53,729 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:18:53,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:18:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-11-23 20:18:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:18:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-11-23 20:18:53,735 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 31 [2019-11-23 20:18:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:53,735 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-11-23 20:18:53,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:18:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-11-23 20:18:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:18:53,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:53,737 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:53,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:53,944 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash 78567771, now seen corresponding path program 6 times [2019-11-23 20:18:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:53,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466284803] [2019-11-23 20:18:53,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:18:54,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466284803] [2019-11-23 20:18:54,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743523831] [2019-11-23 20:18:54,086 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 20:18:54,143 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:18:54,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:54,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:18:54,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:18:54,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:54,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-11-23 20:18:54,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036231479] [2019-11-23 20:18:54,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:18:54,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:54,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:18:54,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:54,158 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 9 states. [2019-11-23 20:18:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:54,240 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2019-11-23 20:18:54,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:18:54,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-11-23 20:18:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:54,241 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:18:54,241 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:18:54,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:54,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:18:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-23 20:18:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:18:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-11-23 20:18:54,256 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 36 [2019-11-23 20:18:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:54,256 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-11-23 20:18:54,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:18:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-11-23 20:18:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:18:54,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:54,258 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:54,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:54,459 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:54,459 INFO L82 PathProgramCache]: Analyzing trace with hash 266712071, now seen corresponding path program 7 times [2019-11-23 20:18:54,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:54,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674202994] [2019-11-23 20:18:54,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:18:54,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674202994] [2019-11-23 20:18:54,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007626320] [2019-11-23 20:18:54,620 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 20:18:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:54,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:18:54,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:18:54,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:54,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:18:54,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043830481] [2019-11-23 20:18:54,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:54,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:54,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:54,727 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 11 states. [2019-11-23 20:18:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:54,811 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2019-11-23 20:18:54,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:18:54,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-11-23 20:18:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:54,815 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:18:54,815 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:18:54,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 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 20:18:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:18:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-23 20:18:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:18:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2019-11-23 20:18:54,822 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 41 [2019-11-23 20:18:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:54,822 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2019-11-23 20:18:54,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2019-11-23 20:18:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:18:54,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:54,824 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:55,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:55,033 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1334495457, now seen corresponding path program 8 times [2019-11-23 20:18:55,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:55,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231719484] [2019-11-23 20:18:55,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:18:55,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231719484] [2019-11-23 20:18:55,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203799988] [2019-11-23 20:18:55,149 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 20:18:55,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:55,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:55,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:18:55,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:18:55,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:55,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:18:55,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156689349] [2019-11-23 20:18:55,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:55,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:55,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:55,234 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 12 states. [2019-11-23 20:18:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:55,362 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2019-11-23 20:18:55,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:18:55,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-11-23 20:18:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:55,364 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:18:55,364 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:18:55,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 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 20:18:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:18:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-23 20:18:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:18:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-11-23 20:18:55,378 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2019-11-23 20:18:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:55,378 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-11-23 20:18:55,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-11-23 20:18:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:18:55,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:55,383 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:55,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:55,584 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash 134543939, now seen corresponding path program 9 times [2019-11-23 20:18:55,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:55,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33868540] [2019-11-23 20:18:55,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:18:55,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33868540] [2019-11-23 20:18:55,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220417968] [2019-11-23 20:18:55,722 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 20:18:55,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:18:55,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:55,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:18:55,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:18:55,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:55,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-11-23 20:18:55,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424729496] [2019-11-23 20:18:55,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:55,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:55,796 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 12 states. [2019-11-23 20:18:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:55,884 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2019-11-23 20:18:55,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:18:55,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2019-11-23 20:18:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:55,886 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:18:55,886 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:18:55,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:18:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-11-23 20:18:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:18:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2019-11-23 20:18:55,894 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 51 [2019-11-23 20:18:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:55,894 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2019-11-23 20:18:55,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2019-11-23 20:18:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:18:55,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:55,895 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:56,099 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,100 INFO L82 PathProgramCache]: Analyzing trace with hash 642014435, now seen corresponding path program 10 times [2019-11-23 20:18:56,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855267699] [2019-11-23 20:18:56,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:18:56,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855267699] [2019-11-23 20:18:56,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336943720] [2019-11-23 20:18:56,241 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 20:18:56,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:56,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:56,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:18:56,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:18:56,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:56,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:18:56,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927326423] [2019-11-23 20:18:56,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:18:56,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:18:56,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:18:56,313 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 14 states. [2019-11-23 20:18:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:56,443 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2019-11-23 20:18:56,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:18:56,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-11-23 20:18:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:56,444 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:18:56,445 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:18:56,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 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 20:18:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:18:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-11-23 20:18:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:18:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-11-23 20:18:56,451 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 56 [2019-11-23 20:18:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:56,451 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-11-23 20:18:56,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:18:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-11-23 20:18:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:18:56,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:56,452 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:56,657 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,657 INFO L82 PathProgramCache]: Analyzing trace with hash 47405183, now seen corresponding path program 11 times [2019-11-23 20:18:56,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344209508] [2019-11-23 20:18:56,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:18:56,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344209508] [2019-11-23 20:18:56,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519273736] [2019-11-23 20:18:56,784 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 20:18:56,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:18:56,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:56,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:18:56,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:18:56,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:56,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:18:56,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309306012] [2019-11-23 20:18:56,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:18:56,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:18:56,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:56,931 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 15 states. [2019-11-23 20:18:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,040 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2019-11-23 20:18:57,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:18:57,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2019-11-23 20:18:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,042 INFO L225 Difference]: With dead ends: 111 [2019-11-23 20:18:57,042 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:18:57,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:18:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2019-11-23 20:18:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:18:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2019-11-23 20:18:57,049 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 61 [2019-11-23 20:18:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:57,049 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2019-11-23 20:18:57,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:18:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2019-11-23 20:18:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:18:57,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:57,051 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:57,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:57,255 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2144564569, now seen corresponding path program 12 times [2019-11-23 20:18:57,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:57,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616642214] [2019-11-23 20:18:57,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:18:57,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616642214] [2019-11-23 20:18:57,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934064956] [2019-11-23 20:18:57,409 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 20:18:57,534 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:18:57,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:57,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:18:57,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:18:57,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:57,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-11-23 20:18:57,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447320051] [2019-11-23 20:18:57,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:18:57,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:57,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:18:57,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:57,558 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 15 states. [2019-11-23 20:18:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,664 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2019-11-23 20:18:57,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:18:57,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2019-11-23 20:18:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,666 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:18:57,666 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:18:57,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:18:57,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-11-23 20:18:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:18:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2019-11-23 20:18:57,672 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 66 [2019-11-23 20:18:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:57,672 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2019-11-23 20:18:57,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:18:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2019-11-23 20:18:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:18:57,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:57,673 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:57,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:57,878 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash 381718203, now seen corresponding path program 13 times [2019-11-23 20:18:57,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:57,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519437757] [2019-11-23 20:18:57,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:18:58,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519437757] [2019-11-23 20:18:58,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118987435] [2019-11-23 20:18:58,285 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 20:18:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:58,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:18:58,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:18:58,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:58,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:18:58,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72331886] [2019-11-23 20:18:58,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:18:58,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:18:58,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:18:58,407 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 17 states. [2019-11-23 20:18:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:58,525 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2019-11-23 20:18:58,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:18:58,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2019-11-23 20:18:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:58,526 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:18:58,527 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:18:58,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:18:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:18:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2019-11-23 20:18:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:18:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2019-11-23 20:18:58,533 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 71 [2019-11-23 20:18:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:58,534 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2019-11-23 20:18:58,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:18:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2019-11-23 20:18:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:18:58,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:58,535 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:58,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,740 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:58,740 INFO L82 PathProgramCache]: Analyzing trace with hash -935460757, now seen corresponding path program 14 times [2019-11-23 20:18:58,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:58,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645304562] [2019-11-23 20:18:58,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:18:59,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645304562] [2019-11-23 20:18:59,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198972318] [2019-11-23 20:18:59,004 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 20:18:59,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:59,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:59,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:18:59,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:18:59,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:59,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:18:59,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877088399] [2019-11-23 20:18:59,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:18:59,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:59,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:18:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:59,106 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 18 states. [2019-11-23 20:18:59,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:59,231 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2019-11-23 20:18:59,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:18:59,231 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2019-11-23 20:18:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:59,232 INFO L225 Difference]: With dead ends: 135 [2019-11-23 20:18:59,233 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:18:59,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 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 20:18:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:18:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2019-11-23 20:18:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:18:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2019-11-23 20:18:59,243 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 76 [2019-11-23 20:18:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:59,243 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2019-11-23 20:18:59,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:18:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2019-11-23 20:18:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:18:59,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:59,244 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:59,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,455 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:59,455 INFO L82 PathProgramCache]: Analyzing trace with hash -935568137, now seen corresponding path program 15 times [2019-11-23 20:18:59,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:59,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771149124] [2019-11-23 20:18:59,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:18:59,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771149124] [2019-11-23 20:18:59,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633078627] [2019-11-23 20:18:59,673 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 20:18:59,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:18:59,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:59,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:18:59,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:18:59,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:59,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2019-11-23 20:18:59,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377821552] [2019-11-23 20:18:59,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:18:59,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:59,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:18:59,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:59,953 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 18 states. [2019-11-23 20:19:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:00,089 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2019-11-23 20:19:00,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:19:00,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-23 20:19:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:00,090 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:19:00,091 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:19:00,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:19:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:19:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2019-11-23 20:19:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:19:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2019-11-23 20:19:00,095 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 81 [2019-11-23 20:19:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:00,096 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2019-11-23 20:19:00,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:19:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2019-11-23 20:19:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:19:00,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:00,097 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:00,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,301 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1015610927, now seen corresponding path program 16 times [2019-11-23 20:19:00,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:00,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495280978] [2019-11-23 20:19:00,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:19:00,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495280978] [2019-11-23 20:19:00,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085284212] [2019-11-23 20:19:00,506 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 20:19:00,575 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:00,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:00,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:19:00,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:19:00,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:00,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:19:00,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733045653] [2019-11-23 20:19:00,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:19:00,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:00,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:19:00,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:00,602 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 20 states. [2019-11-23 20:19:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:00,753 INFO L93 Difference]: Finished difference Result 151 states and 188 transitions. [2019-11-23 20:19:00,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:19:00,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2019-11-23 20:19:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:00,755 INFO L225 Difference]: With dead ends: 151 [2019-11-23 20:19:00,755 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:19:00,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:19:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-11-23 20:19:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:19:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2019-11-23 20:19:00,760 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 86 [2019-11-23 20:19:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:00,760 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2019-11-23 20:19:00,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:19:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2019-11-23 20:19:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:19:00,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:00,761 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:00,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,965 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:00,966 INFO L82 PathProgramCache]: Analyzing trace with hash -977894605, now seen corresponding path program 17 times [2019-11-23 20:19:00,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:00,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574290589] [2019-11-23 20:19:00,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:19:01,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574290589] [2019-11-23 20:19:01,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647260668] [2019-11-23 20:19:01,206 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 20:19:01,499 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:19:01,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:01,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:19:01,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:19:01,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:01,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:19:01,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460279788] [2019-11-23 20:19:01,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:19:01,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:01,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:19:01,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:19:01,542 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 21 states. [2019-11-23 20:19:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:01,701 INFO L93 Difference]: Finished difference Result 159 states and 198 transitions. [2019-11-23 20:19:01,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:19:01,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2019-11-23 20:19:01,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:01,703 INFO L225 Difference]: With dead ends: 159 [2019-11-23 20:19:01,703 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:19:01,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:19:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:19:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2019-11-23 20:19:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:19:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2019-11-23 20:19:01,707 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 91 [2019-11-23 20:19:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:01,707 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2019-11-23 20:19:01,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:19:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2019-11-23 20:19:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:19:01,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:01,709 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:01,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:01,914 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1826765837, now seen corresponding path program 18 times [2019-11-23 20:19:01,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:01,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760661739] [2019-11-23 20:19:01,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:19:02,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760661739] [2019-11-23 20:19:02,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670156252] [2019-11-23 20:19:02,123 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 20:19:02,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:19:02,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:02,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:19:02,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:19:02,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:02,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2019-11-23 20:19:02,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58756656] [2019-11-23 20:19:02,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:19:02,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:19:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:19:02,597 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 21 states. [2019-11-23 20:19:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:02,751 INFO L93 Difference]: Finished difference Result 167 states and 208 transitions. [2019-11-23 20:19:02,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:19:02,752 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2019-11-23 20:19:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:02,753 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:19:02,753 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 20:19:02,753 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:19:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 20:19:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2019-11-23 20:19:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:19:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2019-11-23 20:19:02,757 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 96 [2019-11-23 20:19:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:02,758 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2019-11-23 20:19:02,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:19:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2019-11-23 20:19:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:19:02,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:02,760 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:02,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:02,969 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:02,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1549876881, now seen corresponding path program 19 times [2019-11-23 20:19:02,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:02,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298384530] [2019-11-23 20:19:02,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-23 20:19:03,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298384530] [2019-11-23 20:19:03,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436991343] [2019-11-23 20:19:03,264 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 20:19:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:03,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:19:03,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-23 20:19:03,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:03,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:19:03,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440064625] [2019-11-23 20:19:03,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:19:03,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:03,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:19:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:03,372 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 23 states. [2019-11-23 20:19:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:03,566 INFO L93 Difference]: Finished difference Result 175 states and 218 transitions. [2019-11-23 20:19:03,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:19:03,568 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2019-11-23 20:19:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:03,570 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:19:03,570 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:19:03,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 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 20:19:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:19:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2019-11-23 20:19:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-23 20:19:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2019-11-23 20:19:03,575 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 101 [2019-11-23 20:19:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:03,575 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2019-11-23 20:19:03,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:19:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2019-11-23 20:19:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 20:19:03,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:03,576 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:03,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:03,780 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1041011127, now seen corresponding path program 20 times [2019-11-23 20:19:03,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:03,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678401721] [2019-11-23 20:19:03,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:19:04,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678401721] [2019-11-23 20:19:04,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683986574] [2019-11-23 20:19:04,051 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 20:19:04,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:04,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:04,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:19:04,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:19:04,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:04,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:19:04,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358831724] [2019-11-23 20:19:04,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:19:04,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:19:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:19:04,156 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 24 states. [2019-11-23 20:19:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:04,365 INFO L93 Difference]: Finished difference Result 183 states and 228 transitions. [2019-11-23 20:19:04,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:19:04,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-23 20:19:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:04,367 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:19:04,367 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:19:04,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 106 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 20:19:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:19:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2019-11-23 20:19:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:19:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2019-11-23 20:19:04,372 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 106 [2019-11-23 20:19:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:04,373 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2019-11-23 20:19:04,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:19:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2019-11-23 20:19:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:19:04,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:04,374 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:04,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:04,590 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1738221653, now seen corresponding path program 21 times [2019-11-23 20:19:04,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:04,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629074779] [2019-11-23 20:19:04,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-23 20:19:04,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629074779] [2019-11-23 20:19:04,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226822735] [2019-11-23 20:19:04,876 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 20:19:06,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 20:19:06,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:06,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:19:06,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:19:06,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:06,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2019-11-23 20:19:06,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519169819] [2019-11-23 20:19:06,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:19:06,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:19:06,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:19:06,189 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 24 states. [2019-11-23 20:19:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:06,349 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2019-11-23 20:19:06,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:19:06,350 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2019-11-23 20:19:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:06,350 INFO L225 Difference]: With dead ends: 191 [2019-11-23 20:19:06,350 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 20:19:06,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:19:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 20:19:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2019-11-23 20:19:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-23 20:19:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2019-11-23 20:19:06,355 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 111 [2019-11-23 20:19:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:06,356 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2019-11-23 20:19:06,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:19:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2019-11-23 20:19:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-23 20:19:06,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:06,357 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:06,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:06,563 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1352292485, now seen corresponding path program 22 times [2019-11-23 20:19:06,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:06,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674140246] [2019-11-23 20:19:06,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:19:06,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674140246] [2019-11-23 20:19:06,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436865121] [2019-11-23 20:19:06,875 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 20:19:06,945 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:06,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:06,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:19:06,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:19:06,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:06,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:19:06,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121411284] [2019-11-23 20:19:06,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:19:06,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:19:06,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:06,978 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 26 states. [2019-11-23 20:19:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:07,140 INFO L93 Difference]: Finished difference Result 199 states and 248 transitions. [2019-11-23 20:19:07,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:19:07,141 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2019-11-23 20:19:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:07,142 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:19:07,142 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:19:07,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:07,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:19:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2019-11-23 20:19:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:19:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2019-11-23 20:19:07,146 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 116 [2019-11-23 20:19:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:07,146 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2019-11-23 20:19:07,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:19:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2019-11-23 20:19:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 20:19:07,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:07,147 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:07,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:07,350 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash 947422695, now seen corresponding path program 23 times [2019-11-23 20:19:07,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:07,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521547049] [2019-11-23 20:19:07,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 20:19:07,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521547049] [2019-11-23 20:19:07,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137973630] [2019-11-23 20:19:07,689 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 20:19:08,323 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:19:08,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:08,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:19:08,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:19:08,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:08,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2019-11-23 20:19:08,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847489946] [2019-11-23 20:19:08,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:19:08,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:08,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:19:08,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:08,356 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 26 states. [2019-11-23 20:19:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:08,556 INFO L93 Difference]: Finished difference Result 207 states and 258 transitions. [2019-11-23 20:19:08,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:19:08,556 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2019-11-23 20:19:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:08,558 INFO L225 Difference]: With dead ends: 207 [2019-11-23 20:19:08,558 INFO L226 Difference]: Without dead ends: 132 [2019-11-23 20:19:08,559 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-23 20:19:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2019-11-23 20:19:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-23 20:19:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2019-11-23 20:19:08,564 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 121 [2019-11-23 20:19:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:08,564 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2019-11-23 20:19:08,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:19:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2019-11-23 20:19:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-23 20:19:08,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:08,565 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:08,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:08,770 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1657191105, now seen corresponding path program 24 times [2019-11-23 20:19:08,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:08,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046739788] [2019-11-23 20:19:08,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-11-23 20:19:09,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046739788] [2019-11-23 20:19:09,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791149527] [2019-11-23 20:19:09,210 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 20:19:10,541 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:19:10,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:10,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:19:10,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-11-23 20:19:10,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:10,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:19:10,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960302574] [2019-11-23 20:19:10,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:19:10,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:10,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:19:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:19:10,576 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 28 states. [2019-11-23 20:19:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:10,789 INFO L93 Difference]: Finished difference Result 215 states and 268 transitions. [2019-11-23 20:19:10,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:19:10,789 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2019-11-23 20:19:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:10,790 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:19:10,790 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:19:10,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:19:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:19:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2019-11-23 20:19:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:19:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2019-11-23 20:19:10,795 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 126 [2019-11-23 20:19:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:10,795 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2019-11-23 20:19:10,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:19:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2019-11-23 20:19:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-23 20:19:10,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:10,796 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:11,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:11,001 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash 843680803, now seen corresponding path program 25 times [2019-11-23 20:19:11,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:11,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463116756] [2019-11-23 20:19:11,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-11-23 20:19:11,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463116756] [2019-11-23 20:19:11,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881899718] [2019-11-23 20:19:11,556 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 20:19:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:11,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:19:11,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-11-23 20:19:11,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:11,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:19:11,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929449429] [2019-11-23 20:19:11,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:19:11,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:11,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:19:11,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:11,730 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 29 states. [2019-11-23 20:19:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:12,017 INFO L93 Difference]: Finished difference Result 223 states and 278 transitions. [2019-11-23 20:19:12,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:19:12,018 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 131 [2019-11-23 20:19:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:12,019 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:19:12,019 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 20:19:12,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 20:19:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2019-11-23 20:19:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-23 20:19:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2019-11-23 20:19:12,024 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 131 [2019-11-23 20:19:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:12,024 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2019-11-23 20:19:12,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:19:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2019-11-23 20:19:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-23 20:19:12,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:12,025 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:12,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:12,230 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:12,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1167567619, now seen corresponding path program 26 times [2019-11-23 20:19:12,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:12,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969954567] [2019-11-23 20:19:12,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-11-23 20:19:12,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969954567] [2019-11-23 20:19:12,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718051329] [2019-11-23 20:19:12,785 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 20:19:12,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:12,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:12,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:19:12,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-11-23 20:19:12,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:12,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:19:12,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057468741] [2019-11-23 20:19:12,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:19:12,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:12,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:19:12,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:12,910 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 30 states. [2019-11-23 20:19:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:13,121 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2019-11-23 20:19:13,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:19:13,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 136 [2019-11-23 20:19:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:13,122 INFO L225 Difference]: With dead ends: 231 [2019-11-23 20:19:13,123 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:19:13,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:19:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2019-11-23 20:19:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-23 20:19:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2019-11-23 20:19:13,129 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 136 [2019-11-23 20:19:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:13,130 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2019-11-23 20:19:13,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:19:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2019-11-23 20:19:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 20:19:13,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:13,131 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:13,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:13,335 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash 172468831, now seen corresponding path program 27 times [2019-11-23 20:19:13,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:13,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407391276] [2019-11-23 20:19:13,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-11-23 20:19:13,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407391276] [2019-11-23 20:19:13,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078578402] [2019-11-23 20:19:13,950 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 20:19:16,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-11-23 20:19:16,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:16,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:19:16,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 20:19:16,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:16,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2019-11-23 20:19:16,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591778815] [2019-11-23 20:19:16,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:19:16,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:19:16,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:16,913 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 30 states. [2019-11-23 20:19:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:17,188 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2019-11-23 20:19:17,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:19:17,188 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2019-11-23 20:19:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:17,189 INFO L225 Difference]: With dead ends: 239 [2019-11-23 20:19:17,189 INFO L226 Difference]: Without dead ends: 152 [2019-11-23 20:19:17,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-23 20:19:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2019-11-23 20:19:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-11-23 20:19:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2019-11-23 20:19:17,195 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 141 [2019-11-23 20:19:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:17,195 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2019-11-23 20:19:17,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:19:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2019-11-23 20:19:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-23 20:19:17,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:17,196 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:17,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:17,403 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:17,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1299113785, now seen corresponding path program 28 times [2019-11-23 20:19:17,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:17,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084372443] [2019-11-23 20:19:17,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2019-11-23 20:19:18,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084372443] [2019-11-23 20:19:18,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962227115] [2019-11-23 20:19:18,053 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 20:19:18,182 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:18,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:18,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:19:18,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-11-23 20:19:18,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:18,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2019-11-23 20:19:18,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934129347] [2019-11-23 20:19:18,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:19:18,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:19:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:18,242 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 31 states. [2019-11-23 20:19:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:18,583 INFO L93 Difference]: Finished difference Result 247 states and 308 transitions. [2019-11-23 20:19:18,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:19:18,583 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2019-11-23 20:19:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:18,585 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:19:18,585 INFO L226 Difference]: Without dead ends: 157 [2019-11-23 20:19:18,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-23 20:19:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2019-11-23 20:19:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-11-23 20:19:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2019-11-23 20:19:18,591 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 146 [2019-11-23 20:19:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:18,591 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2019-11-23 20:19:18,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:19:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2019-11-23 20:19:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-23 20:19:18,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:18,593 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:18,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:18,797 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:18,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:18,797 INFO L82 PathProgramCache]: Analyzing trace with hash -689790821, now seen corresponding path program 29 times [2019-11-23 20:19:18,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:18,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050634246] [2019-11-23 20:19:18,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2019-11-23 20:19:19,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050634246] [2019-11-23 20:19:19,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007740784] [2019-11-23 20:19:19,342 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 20:19:20,359 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:19:20,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:20,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:19:20,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:19:20,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:20,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2019-11-23 20:19:20,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259244440] [2019-11-23 20:19:20,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:19:20,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:20,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:19:20,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:19:20,397 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 32 states. [2019-11-23 20:19:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:20,701 INFO L93 Difference]: Finished difference Result 255 states and 318 transitions. [2019-11-23 20:19:20,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:19:20,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2019-11-23 20:19:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:20,703 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:19:20,703 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:19:20,705 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:19:20,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:19:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2019-11-23 20:19:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-11-23 20:19:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2019-11-23 20:19:20,716 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 151 [2019-11-23 20:19:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:20,717 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2019-11-23 20:19:20,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:19:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2019-11-23 20:19:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-23 20:19:20,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:20,719 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:20,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:20,927 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:20,928 INFO L82 PathProgramCache]: Analyzing trace with hash -30028149, now seen corresponding path program 30 times [2019-11-23 20:19:20,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:20,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660568788] [2019-11-23 20:19:20,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2019-11-23 20:19:21,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660568788] [2019-11-23 20:19:21,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269739554] [2019-11-23 20:19:21,616 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 20:19:28,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 20:19:28,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:28,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:19:28,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 20:19:28,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:28,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2019-11-23 20:19:28,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942599221] [2019-11-23 20:19:28,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:19:28,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:19:28,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:28,257 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 33 states. [2019-11-23 20:19:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:28,501 INFO L93 Difference]: Finished difference Result 263 states and 328 transitions. [2019-11-23 20:19:28,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:19:28,503 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2019-11-23 20:19:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:28,504 INFO L225 Difference]: With dead ends: 263 [2019-11-23 20:19:28,504 INFO L226 Difference]: Without dead ends: 167 [2019-11-23 20:19:28,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-23 20:19:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2019-11-23 20:19:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:19:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2019-11-23 20:19:28,511 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 156 [2019-11-23 20:19:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:28,511 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2019-11-23 20:19:28,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:19:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2019-11-23 20:19:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:19:28,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:28,513 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:28,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:28,720 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash -58052905, now seen corresponding path program 31 times [2019-11-23 20:19:28,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:28,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38041264] [2019-11-23 20:19:28,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2019-11-23 20:19:29,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38041264] [2019-11-23 20:19:29,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136595477] [2019-11-23 20:19:29,410 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 20:19:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:29,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:19:29,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2019-11-23 20:19:29,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:29,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:19:29,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017751405] [2019-11-23 20:19:29,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:19:29,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:29,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:19:29,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:19:29,545 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 35 states. [2019-11-23 20:19:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:29,830 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2019-11-23 20:19:29,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:19:29,835 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 161 [2019-11-23 20:19:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:29,836 INFO L225 Difference]: With dead ends: 271 [2019-11-23 20:19:29,836 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:19:29,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:19:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:19:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2019-11-23 20:19:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-11-23 20:19:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2019-11-23 20:19:29,842 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 161 [2019-11-23 20:19:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:29,842 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2019-11-23 20:19:29,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:19:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2019-11-23 20:19:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:19:29,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:29,844 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:30,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:30,047 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1768551345, now seen corresponding path program 32 times [2019-11-23 20:19:30,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:30,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661897194] [2019-11-23 20:19:30,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2019-11-23 20:19:30,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661897194] [2019-11-23 20:19:30,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493446901] [2019-11-23 20:19:30,721 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 20:19:30,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:30,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:30,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:19:30,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2019-11-23 20:19:30,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:30,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:19:30,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423709388] [2019-11-23 20:19:30,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:19:30,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:30,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:19:30,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:30,926 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 36 states. [2019-11-23 20:19:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:31,241 INFO L93 Difference]: Finished difference Result 279 states and 348 transitions. [2019-11-23 20:19:31,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:19:31,241 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 166 [2019-11-23 20:19:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:31,243 INFO L225 Difference]: With dead ends: 279 [2019-11-23 20:19:31,243 INFO L226 Difference]: Without dead ends: 177 [2019-11-23 20:19:31,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-23 20:19:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2019-11-23 20:19:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-23 20:19:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2019-11-23 20:19:31,249 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 166 [2019-11-23 20:19:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:31,249 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2019-11-23 20:19:31,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:19:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2019-11-23 20:19:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:19:31,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:31,251 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:31,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:31,454 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash -374467309, now seen corresponding path program 33 times [2019-11-23 20:19:31,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:31,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49284892] [2019-11-23 20:19:31,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-11-23 20:19:32,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49284892] [2019-11-23 20:19:32,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569947621] [2019-11-23 20:19:32,212 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 20:19:40,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-11-23 20:19:40,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:40,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:19:40,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-11-23 20:19:40,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:40,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2019-11-23 20:19:40,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663014182] [2019-11-23 20:19:40,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:19:40,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:40,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:19:40,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:40,106 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 36 states. [2019-11-23 20:19:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:40,414 INFO L93 Difference]: Finished difference Result 287 states and 358 transitions. [2019-11-23 20:19:40,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:19:40,414 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 171 [2019-11-23 20:19:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:40,416 INFO L225 Difference]: With dead ends: 287 [2019-11-23 20:19:40,416 INFO L226 Difference]: Without dead ends: 182 [2019-11-23 20:19:40,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:19:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-23 20:19:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2019-11-23 20:19:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-23 20:19:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2019-11-23 20:19:40,422 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 171 [2019-11-23 20:19:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:40,422 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2019-11-23 20:19:40,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:19:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2019-11-23 20:19:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-23 20:19:40,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:40,424 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:40,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:40,630 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:40,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2117987821, now seen corresponding path program 34 times [2019-11-23 20:19:40,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:40,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230120552] [2019-11-23 20:19:40,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2019-11-23 20:19:41,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230120552] [2019-11-23 20:19:41,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956382063] [2019-11-23 20:19:41,398 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 20:19:41,503 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:41,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:41,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:19:41,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2019-11-23 20:19:41,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:41,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:19:41,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422819962] [2019-11-23 20:19:41,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:19:41,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:41,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:19:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:19:41,547 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 38 states. [2019-11-23 20:19:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:41,864 INFO L93 Difference]: Finished difference Result 295 states and 368 transitions. [2019-11-23 20:19:41,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:19:41,865 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 176 [2019-11-23 20:19:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:41,866 INFO L225 Difference]: With dead ends: 295 [2019-11-23 20:19:41,866 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 20:19:41,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:19:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 20:19:41,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2019-11-23 20:19:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 20:19:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2019-11-23 20:19:41,873 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 176 [2019-11-23 20:19:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:41,873 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2019-11-23 20:19:41,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:19:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2019-11-23 20:19:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-23 20:19:41,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:41,874 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:42,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:42,078 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash -759295153, now seen corresponding path program 35 times [2019-11-23 20:19:42,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:42,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205303154] [2019-11-23 20:19:42,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2019-11-23 20:19:42,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205303154] [2019-11-23 20:19:42,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491530502] [2019-11-23 20:19:42,736 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 20:19:45,904 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:19:45,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:45,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:19:45,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2019-11-23 20:19:45,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:45,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:19:45,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865203844] [2019-11-23 20:19:45,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:19:45,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:19:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:45,955 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 39 states. [2019-11-23 20:19:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:46,274 INFO L93 Difference]: Finished difference Result 303 states and 378 transitions. [2019-11-23 20:19:46,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:19:46,274 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 181 [2019-11-23 20:19:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:46,276 INFO L225 Difference]: With dead ends: 303 [2019-11-23 20:19:46,276 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:19:46,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:19:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2019-11-23 20:19:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-11-23 20:19:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2019-11-23 20:19:46,282 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 181 [2019-11-23 20:19:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:46,282 INFO L462 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2019-11-23 20:19:46,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:19:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2019-11-23 20:19:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-23 20:19:46,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:46,283 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:46,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:46,486 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:46,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:46,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1580589097, now seen corresponding path program 36 times [2019-11-23 20:19:46,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:46,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992325098] [2019-11-23 20:19:46,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2019-11-23 20:19:47,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992325098] [2019-11-23 20:19:47,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342369389] [2019-11-23 20:19:47,140 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 20:20:26,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 20:20:26,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:26,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2019-11-23 20:20:26,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:26,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:20:26,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673675654] [2019-11-23 20:20:26,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:20:26,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:20:26,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:20:26,234 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 40 states. [2019-11-23 20:20:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,589 INFO L93 Difference]: Finished difference Result 311 states and 388 transitions. [2019-11-23 20:20:26,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:20:26,589 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 186 [2019-11-23 20:20:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,590 INFO L225 Difference]: With dead ends: 311 [2019-11-23 20:20:26,590 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 20:20:26,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:20:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 20:20:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2019-11-23 20:20:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:20:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2019-11-23 20:20:26,595 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 186 [2019-11-23 20:20:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,596 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2019-11-23 20:20:26,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:20:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2019-11-23 20:20:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 20:20:26,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,597 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,814 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1848240523, now seen corresponding path program 37 times [2019-11-23 20:20:26,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680755231] [2019-11-23 20:20:26,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2019-11-23 20:20:27,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680755231] [2019-11-23 20:20:27,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660393942] [2019-11-23 20:20:27,528 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 20:20:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:20:27,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2019-11-23 20:20:27,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:27,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:20:27,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289959471] [2019-11-23 20:20:27,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:20:27,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:20:27,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:20:27,685 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 41 states. [2019-11-23 20:20:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:28,014 INFO L93 Difference]: Finished difference Result 319 states and 398 transitions. [2019-11-23 20:20:28,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:20:28,014 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2019-11-23 20:20:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:28,016 INFO L225 Difference]: With dead ends: 319 [2019-11-23 20:20:28,016 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:20:28,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:20:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:20:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2019-11-23 20:20:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-23 20:20:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2019-11-23 20:20:28,022 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 191 [2019-11-23 20:20:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:28,023 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2019-11-23 20:20:28,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:20:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2019-11-23 20:20:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-23 20:20:28,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:28,024 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:28,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,228 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:28,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:28,228 INFO L82 PathProgramCache]: Analyzing trace with hash -121735781, now seen corresponding path program 38 times [2019-11-23 20:20:28,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:28,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672107805] [2019-11-23 20:20:28,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2019-11-23 20:20:29,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672107805] [2019-11-23 20:20:29,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309068202] [2019-11-23 20:20:29,324 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 20:20:29,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:29,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:29,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:20:29,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2019-11-23 20:20:29,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:29,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:20:29,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65787437] [2019-11-23 20:20:29,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:20:29,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:20:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:20:29,485 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 42 states.