/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/Problem11_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:07:08,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:07:08,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:07:08,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:07:08,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:07:08,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:07:08,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:07:08,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:07:08,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:07:08,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:07:08,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:07:08,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:07:08,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:07:08,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:07:08,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:07:08,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:07:08,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:07:08,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:07:08,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:07:08,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:07:08,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:07:08,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:07:08,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:07:08,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:07:08,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 21:07:08,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 21:07:08,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 21:07:08,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 21:07:08,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 21:07:08,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 21:07:08,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 21:07:08,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 21:07:08,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 21:07:08,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 21:07:08,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 21:07:08,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 21:07:08,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 21:07:08,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 21:07:08,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 21:07:08,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 21:07:08,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 21:07:08,286 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 21:07:08,308 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:07:08,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:07:08,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:07:08,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:07:08,311 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:07:08,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:07:08,311 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:07:08,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:07:08,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:07:08,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:07:08,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:07:08,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:07:08,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:07:08,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:07:08,313 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:07:08,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:07:08,314 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:07:08,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:07:08,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:07:08,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:07:08,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:07:08,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:07:08,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:07:08,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:07:08,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:07:08,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:07:08,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:07:08,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:07:08,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:07:08,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:07:08,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:07:08,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:07:08,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:07:08,614 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:07:08,614 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:07:08,615 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-11-23 21:07:08,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37c8a548/e423f47bfad74b909082e9acbcee4abe/FLAG44895bc7f [2019-11-23 21:07:09,337 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:07:09,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-11-23 21:07:09,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37c8a548/e423f47bfad74b909082e9acbcee4abe/FLAG44895bc7f [2019-11-23 21:07:09,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37c8a548/e423f47bfad74b909082e9acbcee4abe [2019-11-23 21:07:09,532 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:07:09,533 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:07:09,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:07:09,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:07:09,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:07:09,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c363272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09, skipping insertion in model container [2019-11-23 21:07:09,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:07:09,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:07:10,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:07:10,285 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:07:10,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:07:10,541 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:07:10,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10 WrapperNode [2019-11-23 21:07:10,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:07:10,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:07:10,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:07:10,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:07:10,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:07:10,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:07:10,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:07:10,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:07:10,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... [2019-11-23 21:07:10,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:07:10,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:07:10,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:07:10,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:07:10,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:07:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:07:10,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:07:12,845 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:07:12,845 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 21:07:12,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:07:12 BoogieIcfgContainer [2019-11-23 21:07:12,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:07:12,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:07:12,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:07:12,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:07:12,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:07:09" (1/3) ... [2019-11-23 21:07:12,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4652a3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:07:12, skipping insertion in model container [2019-11-23 21:07:12,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:10" (2/3) ... [2019-11-23 21:07:12,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4652a3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:07:12, skipping insertion in model container [2019-11-23 21:07:12,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:07:12" (3/3) ... [2019-11-23 21:07:12,861 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2019-11-23 21:07:12,871 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:07:12,882 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:07:12,894 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:07:12,939 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:07:12,939 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:07:12,939 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:07:12,939 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:07:12,940 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:07:12,941 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:07:12,941 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:07:12,941 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:07:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states. [2019-11-23 21:07:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 21:07:12,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:12,991 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:12,991 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:12,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2019-11-23 21:07:13,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:13,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900452170] [2019-11-23 21:07:13,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:13,368 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 21:07:13,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900452170] [2019-11-23 21:07:13,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:13,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:13,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593193897] [2019-11-23 21:07:13,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:13,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:13,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:13,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:13,397 INFO L87 Difference]: Start difference. First operand 283 states. Second operand 4 states. [2019-11-23 21:07:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:15,599 INFO L93 Difference]: Finished difference Result 951 states and 1718 transitions. [2019-11-23 21:07:15,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:15,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-11-23 21:07:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:15,623 INFO L225 Difference]: With dead ends: 951 [2019-11-23 21:07:15,623 INFO L226 Difference]: Without dead ends: 600 [2019-11-23 21:07:15,628 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 21:07:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-23 21:07:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 410. [2019-11-23 21:07:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2019-11-23 21:07:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 593 transitions. [2019-11-23 21:07:15,720 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 593 transitions. Word has length 45 [2019-11-23 21:07:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:15,721 INFO L462 AbstractCegarLoop]: Abstraction has 410 states and 593 transitions. [2019-11-23 21:07:15,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 593 transitions. [2019-11-23 21:07:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 21:07:15,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:15,726 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:07:15,727 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:15,727 INFO L82 PathProgramCache]: Analyzing trace with hash -954308976, now seen corresponding path program 1 times [2019-11-23 21:07:15,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:15,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073671786] [2019-11-23 21:07:15,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:15,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073671786] [2019-11-23 21:07:15,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:15,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:15,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179027465] [2019-11-23 21:07:15,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:15,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:15,955 INFO L87 Difference]: Start difference. First operand 410 states and 593 transitions. Second operand 4 states. [2019-11-23 21:07:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:18,001 INFO L93 Difference]: Finished difference Result 1572 states and 2289 transitions. [2019-11-23 21:07:18,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:18,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-11-23 21:07:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:18,009 INFO L225 Difference]: With dead ends: 1572 [2019-11-23 21:07:18,010 INFO L226 Difference]: Without dead ends: 1164 [2019-11-23 21:07:18,013 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 21:07:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2019-11-23 21:07:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1150. [2019-11-23 21:07:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2019-11-23 21:07:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1569 transitions. [2019-11-23 21:07:18,101 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1569 transitions. Word has length 113 [2019-11-23 21:07:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:18,102 INFO L462 AbstractCegarLoop]: Abstraction has 1150 states and 1569 transitions. [2019-11-23 21:07:18,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1569 transitions. [2019-11-23 21:07:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 21:07:18,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:18,108 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:07:18,108 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:18,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1653006500, now seen corresponding path program 1 times [2019-11-23 21:07:18,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:18,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22073686] [2019-11-23 21:07:18,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:18,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22073686] [2019-11-23 21:07:18,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:18,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:18,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754642300] [2019-11-23 21:07:18,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:18,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:18,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:18,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:18,260 INFO L87 Difference]: Start difference. First operand 1150 states and 1569 transitions. Second operand 4 states. [2019-11-23 21:07:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:19,951 INFO L93 Difference]: Finished difference Result 3966 states and 5435 transitions. [2019-11-23 21:07:19,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:19,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-11-23 21:07:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:19,964 INFO L225 Difference]: With dead ends: 3966 [2019-11-23 21:07:19,965 INFO L226 Difference]: Without dead ends: 2818 [2019-11-23 21:07:19,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 21:07:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2019-11-23 21:07:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2255. [2019-11-23 21:07:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2255 states. [2019-11-23 21:07:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 2823 transitions. [2019-11-23 21:07:20,016 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 2823 transitions. Word has length 121 [2019-11-23 21:07:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:20,017 INFO L462 AbstractCegarLoop]: Abstraction has 2255 states and 2823 transitions. [2019-11-23 21:07:20,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 2823 transitions. [2019-11-23 21:07:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-23 21:07:20,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:20,021 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:07:20,021 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1015853899, now seen corresponding path program 1 times [2019-11-23 21:07:20,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:20,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714918157] [2019-11-23 21:07:20,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:20,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714918157] [2019-11-23 21:07:20,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:20,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:07:20,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992346818] [2019-11-23 21:07:20,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:07:20,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:20,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:07:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:07:20,290 INFO L87 Difference]: Start difference. First operand 2255 states and 2823 transitions. Second operand 5 states. [2019-11-23 21:07:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:22,466 INFO L93 Difference]: Finished difference Result 7660 states and 9979 transitions. [2019-11-23 21:07:22,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:07:22,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2019-11-23 21:07:22,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:22,492 INFO L225 Difference]: With dead ends: 7660 [2019-11-23 21:07:22,493 INFO L226 Difference]: Without dead ends: 5591 [2019-11-23 21:07:22,496 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 21:07:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5591 states. [2019-11-23 21:07:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5591 to 5590. [2019-11-23 21:07:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5590 states. [2019-11-23 21:07:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 7033 transitions. [2019-11-23 21:07:22,603 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 7033 transitions. Word has length 172 [2019-11-23 21:07:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:22,605 INFO L462 AbstractCegarLoop]: Abstraction has 5590 states and 7033 transitions. [2019-11-23 21:07:22,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:07:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 7033 transitions. [2019-11-23 21:07:22,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-11-23 21:07:22,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:22,613 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:22,613 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1806172888, now seen corresponding path program 1 times [2019-11-23 21:07:22,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:22,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450870228] [2019-11-23 21:07:22,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 21:07:22,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450870228] [2019-11-23 21:07:22,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:22,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:07:22,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611878157] [2019-11-23 21:07:22,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:22,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:22,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:22,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:22,907 INFO L87 Difference]: Start difference. First operand 5590 states and 7033 transitions. Second operand 4 states. [2019-11-23 21:07:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:24,706 INFO L93 Difference]: Finished difference Result 12489 states and 15870 transitions. [2019-11-23 21:07:24,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:24,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 249 [2019-11-23 21:07:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:24,738 INFO L225 Difference]: With dead ends: 12489 [2019-11-23 21:07:24,738 INFO L226 Difference]: Without dead ends: 7085 [2019-11-23 21:07:24,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:07:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7085 states. [2019-11-23 21:07:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7085 to 6878. [2019-11-23 21:07:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6878 states. [2019-11-23 21:07:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6878 states to 6878 states and 8515 transitions. [2019-11-23 21:07:24,884 INFO L78 Accepts]: Start accepts. Automaton has 6878 states and 8515 transitions. Word has length 249 [2019-11-23 21:07:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:24,885 INFO L462 AbstractCegarLoop]: Abstraction has 6878 states and 8515 transitions. [2019-11-23 21:07:24,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6878 states and 8515 transitions. [2019-11-23 21:07:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-11-23 21:07:24,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:24,899 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-23 21:07:24,900 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1851926517, now seen corresponding path program 1 times [2019-11-23 21:07:24,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:24,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411082287] [2019-11-23 21:07:24,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 21:07:25,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411082287] [2019-11-23 21:07:25,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:25,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:07:25,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755194439] [2019-11-23 21:07:25,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:25,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:25,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:25,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:25,223 INFO L87 Difference]: Start difference. First operand 6878 states and 8515 transitions. Second operand 4 states. [2019-11-23 21:07:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:27,121 INFO L93 Difference]: Finished difference Result 15060 states and 18819 transitions. [2019-11-23 21:07:27,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:27,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2019-11-23 21:07:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:27,155 INFO L225 Difference]: With dead ends: 15060 [2019-11-23 21:07:27,155 INFO L226 Difference]: Without dead ends: 8368 [2019-11-23 21:07:27,164 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 21:07:27,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8368 states. [2019-11-23 21:07:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8368 to 8166. [2019-11-23 21:07:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8166 states. [2019-11-23 21:07:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 9905 transitions. [2019-11-23 21:07:27,294 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 9905 transitions. Word has length 328 [2019-11-23 21:07:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:27,294 INFO L462 AbstractCegarLoop]: Abstraction has 8166 states and 9905 transitions. [2019-11-23 21:07:27,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 9905 transitions. [2019-11-23 21:07:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-11-23 21:07:27,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:27,309 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-23 21:07:27,309 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash 976606001, now seen corresponding path program 1 times [2019-11-23 21:07:27,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:27,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248071655] [2019-11-23 21:07:27,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-23 21:07:27,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248071655] [2019-11-23 21:07:27,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:27,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:27,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245351249] [2019-11-23 21:07:27,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:07:27,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:27,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:07:27,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:07:27,617 INFO L87 Difference]: Start difference. First operand 8166 states and 9905 transitions. Second operand 3 states. [2019-11-23 21:07:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:28,666 INFO L93 Difference]: Finished difference Result 17072 states and 20672 transitions. [2019-11-23 21:07:28,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:07:28,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2019-11-23 21:07:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:28,695 INFO L225 Difference]: With dead ends: 17072 [2019-11-23 21:07:28,695 INFO L226 Difference]: Without dead ends: 8538 [2019-11-23 21:07:28,704 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 21:07:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8538 states. [2019-11-23 21:07:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8538 to 8167. [2019-11-23 21:07:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8167 states. [2019-11-23 21:07:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 9716 transitions. [2019-11-23 21:07:28,818 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 9716 transitions. Word has length 337 [2019-11-23 21:07:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:28,818 INFO L462 AbstractCegarLoop]: Abstraction has 8167 states and 9716 transitions. [2019-11-23 21:07:28,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:07:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 9716 transitions. [2019-11-23 21:07:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-11-23 21:07:28,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:28,831 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:28,831 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:28,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:28,831 INFO L82 PathProgramCache]: Analyzing trace with hash 162175160, now seen corresponding path program 1 times [2019-11-23 21:07:28,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:28,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877401657] [2019-11-23 21:07:28,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:29,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877401657] [2019-11-23 21:07:29,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407715926] [2019-11-23 21:07:29,321 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 21:07:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:29,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 21:07:29,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:07:29,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:29,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 166 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:30,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:07:30,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2019-11-23 21:07:30,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113559647] [2019-11-23 21:07:30,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 21:07:30,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 21:07:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:07:30,031 INFO L87 Difference]: Start difference. First operand 8167 states and 9716 transitions. Second operand 10 states. [2019-11-23 21:07:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:46,422 INFO L93 Difference]: Finished difference Result 41479 states and 49499 transitions. [2019-11-23 21:07:46,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 21:07:46,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 343 [2019-11-23 21:07:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:46,483 INFO L225 Difference]: With dead ends: 41479 [2019-11-23 21:07:46,483 INFO L226 Difference]: Without dead ends: 33498 [2019-11-23 21:07:46,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=863, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 21:07:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33498 states. [2019-11-23 21:07:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33498 to 27389. [2019-11-23 21:07:47,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27389 states. [2019-11-23 21:07:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27389 states to 27389 states and 31496 transitions. [2019-11-23 21:07:47,942 INFO L78 Accepts]: Start accepts. Automaton has 27389 states and 31496 transitions. Word has length 343 [2019-11-23 21:07:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:47,943 INFO L462 AbstractCegarLoop]: Abstraction has 27389 states and 31496 transitions. [2019-11-23 21:07:47,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 21:07:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 27389 states and 31496 transitions. [2019-11-23 21:07:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2019-11-23 21:07:47,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:47,968 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:48,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:07:48,172 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:48,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:48,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1310153897, now seen corresponding path program 1 times [2019-11-23 21:07:48,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:48,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060161385] [2019-11-23 21:07:48,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 412 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:48,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060161385] [2019-11-23 21:07:48,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940844031] [2019-11-23 21:07:48,834 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 21:07:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:48,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 21:07:48,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:07:48,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:48,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:49,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:50,095 WARN L192 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 26 [2019-11-23 21:07:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 21:07:50,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:07:50,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2019-11-23 21:07:50,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35303731] [2019-11-23 21:07:50,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 21:07:50,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 21:07:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:07:50,486 INFO L87 Difference]: Start difference. First operand 27389 states and 31496 transitions. Second operand 11 states. [2019-11-23 21:08:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:06,608 INFO L93 Difference]: Finished difference Result 67562 states and 77913 transitions. [2019-11-23 21:08:06,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 21:08:06,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 353 [2019-11-23 21:08:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:06,677 INFO L225 Difference]: With dead ends: 67562 [2019-11-23 21:08:06,677 INFO L226 Difference]: Without dead ends: 40359 [2019-11-23 21:08:06,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-11-23 21:08:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40359 states. [2019-11-23 21:08:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40359 to 26278. [2019-11-23 21:08:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26278 states. [2019-11-23 21:08:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 29447 transitions. [2019-11-23 21:08:07,168 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 29447 transitions. Word has length 353 [2019-11-23 21:08:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:07,168 INFO L462 AbstractCegarLoop]: Abstraction has 26278 states and 29447 transitions. [2019-11-23 21:08:07,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 21:08:07,169 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 29447 transitions. [2019-11-23 21:08:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2019-11-23 21:08:07,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:07,203 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 21:08:07,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:07,407 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:07,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:07,407 INFO L82 PathProgramCache]: Analyzing trace with hash 273234903, now seen corresponding path program 1 times [2019-11-23 21:08:07,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:07,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090384096] [2019-11-23 21:08:07,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-11-23 21:08:07,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090384096] [2019-11-23 21:08:07,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:08:07,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:08:07,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265268839] [2019-11-23 21:08:07,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:08:07,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:07,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:08:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:08:07,796 INFO L87 Difference]: Start difference. First operand 26278 states and 29447 transitions. Second operand 4 states. [2019-11-23 21:08:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:09,503 INFO L93 Difference]: Finished difference Result 50728 states and 56908 transitions. [2019-11-23 21:08:09,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:08:09,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 431 [2019-11-23 21:08:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:09,548 INFO L225 Difference]: With dead ends: 50728 [2019-11-23 21:08:09,548 INFO L226 Difference]: Without dead ends: 26852 [2019-11-23 21:08:09,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:08:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2019-11-23 21:08:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 24802. [2019-11-23 21:08:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24802 states. [2019-11-23 21:08:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24802 states to 24802 states and 27654 transitions. [2019-11-23 21:08:09,867 INFO L78 Accepts]: Start accepts. Automaton has 24802 states and 27654 transitions. Word has length 431 [2019-11-23 21:08:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:09,868 INFO L462 AbstractCegarLoop]: Abstraction has 24802 states and 27654 transitions. [2019-11-23 21:08:09,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:08:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 24802 states and 27654 transitions. [2019-11-23 21:08:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2019-11-23 21:08:09,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:09,900 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:09,900 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash -268191883, now seen corresponding path program 1 times [2019-11-23 21:08:09,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:09,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722400317] [2019-11-23 21:08:09,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-11-23 21:08:10,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722400317] [2019-11-23 21:08:10,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:08:10,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 21:08:10,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214298531] [2019-11-23 21:08:10,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:08:10,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:10,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:08:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:08:10,363 INFO L87 Difference]: Start difference. First operand 24802 states and 27654 transitions. Second operand 3 states. [2019-11-23 21:08:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:11,513 INFO L93 Difference]: Finished difference Result 49772 states and 55451 transitions. [2019-11-23 21:08:11,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:08:11,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2019-11-23 21:08:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:11,537 INFO L225 Difference]: With dead ends: 49772 [2019-11-23 21:08:11,537 INFO L226 Difference]: Without dead ends: 22024 [2019-11-23 21:08:11,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:08:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22024 states. [2019-11-23 21:08:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22024 to 19443. [2019-11-23 21:08:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19443 states. [2019-11-23 21:08:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19443 states to 19443 states and 21088 transitions. [2019-11-23 21:08:11,837 INFO L78 Accepts]: Start accepts. Automaton has 19443 states and 21088 transitions. Word has length 467 [2019-11-23 21:08:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:11,837 INFO L462 AbstractCegarLoop]: Abstraction has 19443 states and 21088 transitions. [2019-11-23 21:08:11,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:08:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 19443 states and 21088 transitions. [2019-11-23 21:08:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2019-11-23 21:08:11,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:11,861 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 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 21:08:11,862 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:11,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1445886331, now seen corresponding path program 1 times [2019-11-23 21:08:11,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:11,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53386928] [2019-11-23 21:08:11,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 477 proven. 176 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-23 21:08:12,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53386928] [2019-11-23 21:08:12,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659248047] [2019-11-23 21:08:12,934 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 21:08:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:13,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 21:08:13,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:13,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:13,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:13,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:13,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:15,081 WARN L192 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2019-11-23 21:08:15,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:15,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:15,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 261 proven. 392 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-23 21:08:17,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:08:17,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 11 [2019-11-23 21:08:17,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920801475] [2019-11-23 21:08:17,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 21:08:17,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:17,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 21:08:17,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:08:17,473 INFO L87 Difference]: Start difference. First operand 19443 states and 21088 transitions. Second operand 11 states.