/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/eca-rers2012/Problem15_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:14:11,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:14:11,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:14:11,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:14:11,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:14:11,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:14:11,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:14:11,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:14:11,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:14:11,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:14:11,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:14:11,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:14:11,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:14:11,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:14:11,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:14:11,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:14:11,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:14:11,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 21:14:11,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 21:14:11,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 21:14:11,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:14:11,247 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:14:11,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:14:11,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:14:11,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:14:11,250 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:14:11,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:14:11,251 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:14:11,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:14:11,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:14:11,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:14:11,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:14:11,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:14:11,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:14:11,252 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:14:11,252 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:14:11,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:14:11,253 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:14:11,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:14:11,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:14:11,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:14:11,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:14:11,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:14:11,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:14:11,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:14:11,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:14:11,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:14:11,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:14:11,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:14:11,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:14:11,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:14:11,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:14:11,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:14:11,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:14:11,536 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:14:11,536 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:14:11,537 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-11-23 21:14:11,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/164dedb2f/ed9498e227434377b323331e340d35fa/FLAGda2d82a72 [2019-11-23 21:14:12,246 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:14:12,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-11-23 21:14:12,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/164dedb2f/ed9498e227434377b323331e340d35fa/FLAGda2d82a72 [2019-11-23 21:14:12,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/164dedb2f/ed9498e227434377b323331e340d35fa [2019-11-23 21:14:12,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:14:12,450 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:14:12,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:14:12,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:14:12,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:14:12,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:12" (1/1) ... [2019-11-23 21:14:12,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1e4757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:12, skipping insertion in model container [2019-11-23 21:14:12,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:12" (1/1) ... [2019-11-23 21:14:12,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:14:12,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:14:13,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:14:13,605 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:14:13,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:14:13,994 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:14:13,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13 WrapperNode [2019-11-23 21:14:13,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:14:13,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:14:13,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:14:13,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:14:14,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:14:14,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:14:14,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:14:14,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:14:14,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (1/1) ... [2019-11-23 21:14:14,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:14:14,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:14:14,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:14:14,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:14:14,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (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 21:14:14,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:14:14,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:14:18,943 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:14:18,943 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:14:18,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:18 BoogieIcfgContainer [2019-11-23 21:14:18,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:14:18,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:14:18,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:14:18,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:14:18,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:14:12" (1/3) ... [2019-11-23 21:14:18,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f3d26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:18, skipping insertion in model container [2019-11-23 21:14:18,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:13" (2/3) ... [2019-11-23 21:14:18,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f3d26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:18, skipping insertion in model container [2019-11-23 21:14:18,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:18" (3/3) ... [2019-11-23 21:14:18,954 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2019-11-23 21:14:18,964 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:14:18,972 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:14:18,985 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:14:19,018 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:14:19,018 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:14:19,018 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:14:19,018 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:14:19,019 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:14:19,019 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:14:19,019 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:14:19,019 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:14:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states. [2019-11-23 21:14:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 21:14:19,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:19,054 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:19,055 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2019-11-23 21:14:19,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:19,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475357027] [2019-11-23 21:14:19,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:19,278 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 21:14:19,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475357027] [2019-11-23 21:14:19,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:19,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:14:19,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180712969] [2019-11-23 21:14:19,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:14:19,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:14:19,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:14:19,305 INFO L87 Difference]: Start difference. First operand 424 states. Second operand 5 states. [2019-11-23 21:14:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:24,237 INFO L93 Difference]: Finished difference Result 1466 states and 2714 transitions. [2019-11-23 21:14:24,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:14:24,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 21:14:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:24,263 INFO L225 Difference]: With dead ends: 1466 [2019-11-23 21:14:24,264 INFO L226 Difference]: Without dead ends: 975 [2019-11-23 21:14:24,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 21:14:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2019-11-23 21:14:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 973. [2019-11-23 21:14:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2019-11-23 21:14:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1485 transitions. [2019-11-23 21:14:24,366 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1485 transitions. Word has length 15 [2019-11-23 21:14:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:24,367 INFO L462 AbstractCegarLoop]: Abstraction has 973 states and 1485 transitions. [2019-11-23 21:14:24,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:14:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1485 transitions. [2019-11-23 21:14:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 21:14:24,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:24,374 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:24,375 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:24,375 INFO L82 PathProgramCache]: Analyzing trace with hash -622702090, now seen corresponding path program 1 times [2019-11-23 21:14:24,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:24,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217930280] [2019-11-23 21:14:24,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:14:24,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217930280] [2019-11-23 21:14:24,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:24,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:14:24,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003829236] [2019-11-23 21:14:24,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:14:24,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:24,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:14:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:24,688 INFO L87 Difference]: Start difference. First operand 973 states and 1485 transitions. Second operand 4 states. [2019-11-23 21:14:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:27,970 INFO L93 Difference]: Finished difference Result 3745 states and 5745 transitions. [2019-11-23 21:14:27,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:14:27,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-11-23 21:14:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:27,985 INFO L225 Difference]: With dead ends: 3745 [2019-11-23 21:14:27,985 INFO L226 Difference]: Without dead ends: 2774 [2019-11-23 21:14:27,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2019-11-23 21:14:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 1871. [2019-11-23 21:14:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2019-11-23 21:14:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2498 transitions. [2019-11-23 21:14:28,040 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2498 transitions. Word has length 127 [2019-11-23 21:14:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:28,040 INFO L462 AbstractCegarLoop]: Abstraction has 1871 states and 2498 transitions. [2019-11-23 21:14:28,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:14:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2498 transitions. [2019-11-23 21:14:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-11-23 21:14:28,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:28,049 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:28,050 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1050882844, now seen corresponding path program 1 times [2019-11-23 21:14:28,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:28,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132553218] [2019-11-23 21:14:28,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 21:14:28,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132553218] [2019-11-23 21:14:28,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:28,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:14:28,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254852125] [2019-11-23 21:14:28,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:14:28,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:28,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:14:28,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:14:28,718 INFO L87 Difference]: Start difference. First operand 1871 states and 2498 transitions. Second operand 5 states. [2019-11-23 21:14:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:33,127 INFO L93 Difference]: Finished difference Result 4639 states and 5973 transitions. [2019-11-23 21:14:33,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:14:33,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 287 [2019-11-23 21:14:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:33,152 INFO L225 Difference]: With dead ends: 4639 [2019-11-23 21:14:33,153 INFO L226 Difference]: Without dead ends: 2770 [2019-11-23 21:14:33,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 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 21:14:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2019-11-23 21:14:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 2470. [2019-11-23 21:14:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2470 states. [2019-11-23 21:14:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 3139 transitions. [2019-11-23 21:14:33,238 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 3139 transitions. Word has length 287 [2019-11-23 21:14:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:33,239 INFO L462 AbstractCegarLoop]: Abstraction has 2470 states and 3139 transitions. [2019-11-23 21:14:33,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:14:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 3139 transitions. [2019-11-23 21:14:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2019-11-23 21:14:33,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:33,259 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:33,261 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1535926930, now seen corresponding path program 1 times [2019-11-23 21:14:33,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:33,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026402746] [2019-11-23 21:14:33,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:14:34,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026402746] [2019-11-23 21:14:34,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190725628] [2019-11-23 21:14:34,746 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 21:14:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:34,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:14:34,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:14:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:14:35,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:14:35,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2019-11-23 21:14:35,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277846121] [2019-11-23 21:14:35,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:14:35,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:35,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:14:35,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:14:35,117 INFO L87 Difference]: Start difference. First operand 2470 states and 3139 transitions. Second operand 3 states. [2019-11-23 21:14:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:38,820 INFO L93 Difference]: Finished difference Result 5547 states and 7133 transitions. [2019-11-23 21:14:38,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:14:38,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2019-11-23 21:14:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:38,836 INFO L225 Difference]: With dead ends: 5547 [2019-11-23 21:14:38,837 INFO L226 Difference]: Without dead ends: 3079 [2019-11-23 21:14:38,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 360 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:14:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2019-11-23 21:14:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 3077. [2019-11-23 21:14:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3077 states. [2019-11-23 21:14:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 3865 transitions. [2019-11-23 21:14:38,896 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 3865 transitions. Word has length 361 [2019-11-23 21:14:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:38,897 INFO L462 AbstractCegarLoop]: Abstraction has 3077 states and 3865 transitions. [2019-11-23 21:14:38,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:14:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 3865 transitions. [2019-11-23 21:14:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2019-11-23 21:14:38,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:38,905 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:39,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:14:39,108 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash 743119225, now seen corresponding path program 1 times [2019-11-23 21:14:39,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:39,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617069661] [2019-11-23 21:14:39,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 263 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 21:14:40,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617069661] [2019-11-23 21:14:40,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424222113] [2019-11-23 21:14:40,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:14:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:40,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:14:40,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:14:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 21:14:40,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:14:40,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:14:40,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545676147] [2019-11-23 21:14:40,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:14:40,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:40,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:14:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:14:40,788 INFO L87 Difference]: Start difference. First operand 3077 states and 3865 transitions. Second operand 3 states. [2019-11-23 21:14:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:43,360 INFO L93 Difference]: Finished difference Result 6750 states and 8572 transitions. [2019-11-23 21:14:43,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:14:43,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 378 [2019-11-23 21:14:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:43,379 INFO L225 Difference]: With dead ends: 6750 [2019-11-23 21:14:43,380 INFO L226 Difference]: Without dead ends: 3675 [2019-11-23 21:14:43,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:14:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2019-11-23 21:14:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3675. [2019-11-23 21:14:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3675 states. [2019-11-23 21:14:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 4637 transitions. [2019-11-23 21:14:43,450 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 4637 transitions. Word has length 378 [2019-11-23 21:14:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:43,451 INFO L462 AbstractCegarLoop]: Abstraction has 3675 states and 4637 transitions. [2019-11-23 21:14:43,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:14:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 4637 transitions. [2019-11-23 21:14:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2019-11-23 21:14:43,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:43,464 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:43,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:14:43,668 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1119513537, now seen corresponding path program 1 times [2019-11-23 21:14:43,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:43,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249233588] [2019-11-23 21:14:43,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-11-23 21:14:44,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249233588] [2019-11-23 21:14:44,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746100366] [2019-11-23 21:14:44,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:14:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:44,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:14:44,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:14:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-11-23 21:14:44,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:14:44,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2019-11-23 21:14:44,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580833898] [2019-11-23 21:14:44,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:14:44,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:44,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:14:44,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:44,658 INFO L87 Difference]: Start difference. First operand 3675 states and 4637 transitions. Second operand 3 states. [2019-11-23 21:14:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:46,739 INFO L93 Difference]: Finished difference Result 9146 states and 11374 transitions. [2019-11-23 21:14:46,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:14:46,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2019-11-23 21:14:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:46,764 INFO L225 Difference]: With dead ends: 9146 [2019-11-23 21:14:46,764 INFO L226 Difference]: Without dead ends: 5473 [2019-11-23 21:14:46,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2019-11-23 21:14:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 5172. [2019-11-23 21:14:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5172 states. [2019-11-23 21:14:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 6291 transitions. [2019-11-23 21:14:46,880 INFO L78 Accepts]: Start accepts. Automaton has 5172 states and 6291 transitions. Word has length 474 [2019-11-23 21:14:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:46,881 INFO L462 AbstractCegarLoop]: Abstraction has 5172 states and 6291 transitions. [2019-11-23 21:14:46,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:14:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 5172 states and 6291 transitions. [2019-11-23 21:14:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2019-11-23 21:14:46,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:46,888 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:47,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:14:47,164 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1780707147, now seen corresponding path program 1 times [2019-11-23 21:14:47,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:47,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637917333] [2019-11-23 21:14:47,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2019-11-23 21:14:47,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637917333] [2019-11-23 21:14:47,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:47,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:14:47,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374752279] [2019-11-23 21:14:47,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:14:47,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:14:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:14:47,579 INFO L87 Difference]: Start difference. First operand 5172 states and 6291 transitions. Second operand 3 states. [2019-11-23 21:14:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:50,033 INFO L93 Difference]: Finished difference Result 13929 states and 17105 transitions. [2019-11-23 21:14:50,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:14:50,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2019-11-23 21:14:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:50,069 INFO L225 Difference]: With dead ends: 13929 [2019-11-23 21:14:50,069 INFO L226 Difference]: Without dead ends: 8759 [2019-11-23 21:14:50,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 21:14:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8759 states. [2019-11-23 21:14:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8759 to 5767. [2019-11-23 21:14:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5767 states. [2019-11-23 21:14:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 7357 transitions. [2019-11-23 21:14:50,203 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 7357 transitions. Word has length 489 [2019-11-23 21:14:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:50,204 INFO L462 AbstractCegarLoop]: Abstraction has 5767 states and 7357 transitions. [2019-11-23 21:14:50,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:14:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 7357 transitions. [2019-11-23 21:14:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2019-11-23 21:14:50,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:50,213 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:50,213 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash -68335791, now seen corresponding path program 1 times [2019-11-23 21:14:50,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:50,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042196833] [2019-11-23 21:14:50,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 517 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 21:14:51,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042196833] [2019-11-23 21:14:51,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739187593] [2019-11-23 21:14:51,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:14:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:52,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 21:14:52,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:14:52,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:14:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 481 proven. 39 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 21:14:52,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:14:52,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 21:14:52,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156019276] [2019-11-23 21:14:52,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 21:14:52,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 21:14:52,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:14:52,548 INFO L87 Difference]: Start difference. First operand 5767 states and 7357 transitions. Second operand 9 states. [2019-11-23 21:15:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:01,913 INFO L93 Difference]: Finished difference Result 16769 states and 20802 transitions. [2019-11-23 21:15:01,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 21:15:01,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 542 [2019-11-23 21:15:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:01,933 INFO L225 Difference]: With dead ends: 16769 [2019-11-23 21:15:01,934 INFO L226 Difference]: Without dead ends: 7858 [2019-11-23 21:15:01,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 540 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-11-23 21:15:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7858 states. [2019-11-23 21:15:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7858 to 7559. [2019-11-23 21:15:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7559 states. [2019-11-23 21:15:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7559 states to 7559 states and 8359 transitions. [2019-11-23 21:15:02,040 INFO L78 Accepts]: Start accepts. Automaton has 7559 states and 8359 transitions. Word has length 542 [2019-11-23 21:15:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:02,040 INFO L462 AbstractCegarLoop]: Abstraction has 7559 states and 8359 transitions. [2019-11-23 21:15:02,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 21:15:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 7559 states and 8359 transitions. [2019-11-23 21:15:02,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2019-11-23 21:15:02,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:02,046 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:02,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:02,252 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash -240527515, now seen corresponding path program 1 times [2019-11-23 21:15:02,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:02,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496796194] [2019-11-23 21:15:02,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:04,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496796194] [2019-11-23 21:15:04,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50032118] [2019-11-23 21:15:04,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:15:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:04,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:15:04,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:04,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:04,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2019-11-23 21:15:05,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:05,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 16 [2019-11-23 21:15:05,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870181728] [2019-11-23 21:15:05,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:15:05,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:05,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:15:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-23 21:15:05,295 INFO L87 Difference]: Start difference. First operand 7559 states and 8359 transitions. Second operand 4 states. [2019-11-23 21:15:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:08,216 INFO L93 Difference]: Finished difference Result 22356 states and 24766 transitions. [2019-11-23 21:15:08,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:08,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 550 [2019-11-23 21:15:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:08,243 INFO L225 Difference]: With dead ends: 22356 [2019-11-23 21:15:08,243 INFO L226 Difference]: Without dead ends: 14799 [2019-11-23 21:15:08,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 548 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-23 21:15:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14799 states. [2019-11-23 21:15:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14799 to 12997. [2019-11-23 21:15:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12997 states. [2019-11-23 21:15:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12997 states to 12997 states and 14332 transitions. [2019-11-23 21:15:08,421 INFO L78 Accepts]: Start accepts. Automaton has 12997 states and 14332 transitions. Word has length 550 [2019-11-23 21:15:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:08,424 INFO L462 AbstractCegarLoop]: Abstraction has 12997 states and 14332 transitions. [2019-11-23 21:15:08,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:15:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 12997 states and 14332 transitions. [2019-11-23 21:15:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2019-11-23 21:15:08,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:08,435 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:08,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:08,648 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:08,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:08,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1078773663, now seen corresponding path program 1 times [2019-11-23 21:15:08,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:08,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594056942] [2019-11-23 21:15:08,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-11-23 21:15:09,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594056942] [2019-11-23 21:15:09,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:15:09,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:15:09,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630692895] [2019-11-23 21:15:09,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:15:09,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:09,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:15:09,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:09,073 INFO L87 Difference]: Start difference. First operand 12997 states and 14332 transitions. Second operand 4 states. [2019-11-23 21:15:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:11,047 INFO L93 Difference]: Finished difference Result 25699 states and 28375 transitions. [2019-11-23 21:15:11,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:11,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 580 [2019-11-23 21:15:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:11,067 INFO L225 Difference]: With dead ends: 25699 [2019-11-23 21:15:11,067 INFO L226 Difference]: Without dead ends: 13003 [2019-11-23 21:15:11,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13003 states. [2019-11-23 21:15:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13003 to 12995. [2019-11-23 21:15:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12995 states. [2019-11-23 21:15:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 14046 transitions. [2019-11-23 21:15:11,251 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 14046 transitions. Word has length 580 [2019-11-23 21:15:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:11,251 INFO L462 AbstractCegarLoop]: Abstraction has 12995 states and 14046 transitions. [2019-11-23 21:15:11,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:15:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 14046 transitions. [2019-11-23 21:15:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2019-11-23 21:15:11,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:11,260 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:11,260 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1048763331, now seen corresponding path program 1 times [2019-11-23 21:15:11,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:11,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927689095] [2019-11-23 21:15:11,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:13,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927689095] [2019-11-23 21:15:13,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536895592] [2019-11-23 21:15:13,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:15:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:13,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 21:15:13,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:13,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:15:13,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:13,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:13,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:13,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:13,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:13,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:13,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:13,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 363 proven. 102 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-23 21:15:14,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:15:14,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 20 [2019-11-23 21:15:14,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788175605] [2019-11-23 21:15:14,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 21:15:14,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:14,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 21:15:14,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-11-23 21:15:14,695 INFO L87 Difference]: Start difference. First operand 12995 states and 14046 transitions. Second operand 20 states.