java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label30_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:05:31,794 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:05:31,799 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:05:31,820 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:05:31,820 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:05:31,821 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:05:31,822 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:05:31,825 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:05:31,826 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:05:31,827 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:05:31,828 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:05:31,828 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:05:31,829 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:05:31,830 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:05:31,831 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:05:31,832 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:05:31,833 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:05:31,835 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:05:31,837 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:05:31,839 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:05:31,840 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:05:31,841 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:05:31,843 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 18:05:31,844 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 18:05:31,844 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 18:05:31,845 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 18:05:31,846 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 18:05:31,847 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 18:05:31,848 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 18:05:31,849 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 18:05:31,849 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 18:05:31,850 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 18:05:31,850 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 18:05:31,850 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 18:05:31,851 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 18:05:31,852 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 18:05:31,852 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 18:05:31,867 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:05:31,867 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:05:31,868 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:05:31,868 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:05:31,869 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:05:31,869 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:05:31,869 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:05:31,869 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:05:31,870 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:05:31,870 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:05:31,870 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:05:31,870 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:05:31,870 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:05:31,871 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:05:31,871 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:05:31,871 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:05:31,871 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:05:31,871 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:05:31,872 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:05:31,872 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:05:31,872 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:05:31,872 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:05:31,872 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:05:31,873 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:05:31,873 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:05:31,873 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:05:31,873 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:05:31,874 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:05:31,915 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:05:31,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:05:31,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:05:31,939 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:05:31,939 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:05:31,940 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label30_false-unreach-call.c [2018-10-23 18:05:31,999 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cd4cee305/65e21026317c4f93949d97f93d0ad68e/FLAGffb152c5a [2018-10-23 18:05:32,791 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:05:32,792 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label30_false-unreach-call.c [2018-10-23 18:05:32,825 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cd4cee305/65e21026317c4f93949d97f93d0ad68e/FLAGffb152c5a [2018-10-23 18:05:32,841 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cd4cee305/65e21026317c4f93949d97f93d0ad68e [2018-10-23 18:05:32,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:05:32,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:05:32,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:05:32,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:05:32,861 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:05:32,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:05:32" (1/1) ... [2018-10-23 18:05:32,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab4c919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:32, skipping insertion in model container [2018-10-23 18:05:32,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:05:32" (1/1) ... [2018-10-23 18:05:32,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:05:33,072 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:05:34,645 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:05:34,653 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:05:35,347 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:05:35,383 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:05:35,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35 WrapperNode [2018-10-23 18:05:35,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:05:35,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:05:35,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:05:35,389 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:05:35,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:35,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:36,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:05:36,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:05:36,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:05:36,213 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:05:36,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:36,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:36,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:36,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:36,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:36,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:36,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... [2018-10-23 18:05:36,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:05:36,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:05:36,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:05:36,678 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:05:36,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 18:05:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:05:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:05:36,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:05:49,565 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:05:49,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:05:49 BoogieIcfgContainer [2018-10-23 18:05:49,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:05:49,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:05:49,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:05:49,571 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:05:49,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:05:32" (1/3) ... [2018-10-23 18:05:49,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f14c55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:05:49, skipping insertion in model container [2018-10-23 18:05:49,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:05:35" (2/3) ... [2018-10-23 18:05:49,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f14c55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:05:49, skipping insertion in model container [2018-10-23 18:05:49,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:05:49" (3/3) ... [2018-10-23 18:05:49,577 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label30_false-unreach-call.c [2018-10-23 18:05:49,587 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:05:49,601 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:05:49,619 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:05:49,675 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:05:49,675 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:05:49,675 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:05:49,676 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:05:49,676 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:05:49,676 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:05:49,676 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:05:49,676 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:05:49,676 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:05:49,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-23 18:05:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-23 18:05:49,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:05:49,733 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:05:49,735 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:05:49,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:05:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash 183950178, now seen corresponding path program 1 times [2018-10-23 18:05:49,743 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:05:49,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:05:49,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:05:49,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:05:49,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:05:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:05:50,144 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 18:05:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:05:50,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:05:50,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:05:50,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:05:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:05:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:05:50,260 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-23 18:06:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:06:07,404 INFO L93 Difference]: Finished difference Result 3879 states and 7287 transitions. [2018-10-23 18:06:07,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:06:07,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-10-23 18:06:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:06:07,452 INFO L225 Difference]: With dead ends: 3879 [2018-10-23 18:06:07,452 INFO L226 Difference]: Without dead ends: 2773 [2018-10-23 18:06:07,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:06:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2018-10-23 18:06:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2742. [2018-10-23 18:06:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2742 states. [2018-10-23 18:06:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 4466 transitions. [2018-10-23 18:06:07,637 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 4466 transitions. Word has length 20 [2018-10-23 18:06:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:06:07,638 INFO L481 AbstractCegarLoop]: Abstraction has 2742 states and 4466 transitions. [2018-10-23 18:06:07,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:06:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 4466 transitions. [2018-10-23 18:06:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-23 18:06:07,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:06:07,645 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:06:07,648 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:06:07,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:06:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash 300544526, now seen corresponding path program 1 times [2018-10-23 18:06:07,649 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:06:07,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:06:07,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:06:07,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:06:07,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:06:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:06:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-10-23 18:06:08,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:06:08,031 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:06:08,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:06:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:06:08,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:06:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:06:08,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:06:08,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 18:06:08,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:06:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:06:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:06:08,188 INFO L87 Difference]: Start difference. First operand 2742 states and 4466 transitions. Second operand 4 states. [2018-10-23 18:06:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:06:26,301 INFO L93 Difference]: Finished difference Result 10279 states and 16957 transitions. [2018-10-23 18:06:26,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:06:26,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2018-10-23 18:06:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:06:26,342 INFO L225 Difference]: With dead ends: 10279 [2018-10-23 18:06:26,342 INFO L226 Difference]: Without dead ends: 7539 [2018-10-23 18:06:26,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:06:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7539 states. [2018-10-23 18:06:26,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7539 to 5128. [2018-10-23 18:06:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5128 states. [2018-10-23 18:06:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 8009 transitions. [2018-10-23 18:06:26,466 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 8009 transitions. Word has length 110 [2018-10-23 18:06:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:06:26,467 INFO L481 AbstractCegarLoop]: Abstraction has 5128 states and 8009 transitions. [2018-10-23 18:06:26,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:06:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 8009 transitions. [2018-10-23 18:06:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-23 18:06:26,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:06:26,473 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:06:26,473 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:06:26,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:06:26,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1029685430, now seen corresponding path program 1 times [2018-10-23 18:06:26,474 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:06:26,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:06:26,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:06:26,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:06:26,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:06:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:06:27,516 WARN L179 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-23 18:06:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 18:06:27,623 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:06:27,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:06:27,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:06:27,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:06:27,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:06:27,624 INFO L87 Difference]: Start difference. First operand 5128 states and 8009 transitions. Second operand 5 states. [2018-10-23 18:06:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:06:39,290 INFO L93 Difference]: Finished difference Result 16563 states and 25362 transitions. [2018-10-23 18:06:39,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:06:39,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2018-10-23 18:06:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:06:39,348 INFO L225 Difference]: With dead ends: 16563 [2018-10-23 18:06:39,348 INFO L226 Difference]: Without dead ends: 11437 [2018-10-23 18:06:39,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:06:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11437 states. [2018-10-23 18:06:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11437 to 11436. [2018-10-23 18:06:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11436 states. [2018-10-23 18:06:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11436 states to 11436 states and 15909 transitions. [2018-10-23 18:06:39,549 INFO L78 Accepts]: Start accepts. Automaton has 11436 states and 15909 transitions. Word has length 159 [2018-10-23 18:06:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:06:39,550 INFO L481 AbstractCegarLoop]: Abstraction has 11436 states and 15909 transitions. [2018-10-23 18:06:39,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:06:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 11436 states and 15909 transitions. [2018-10-23 18:06:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-23 18:06:39,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:06:39,553 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:06:39,553 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:06:39,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:06:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1977042759, now seen corresponding path program 1 times [2018-10-23 18:06:39,554 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:06:39,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:06:39,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:06:39,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:06:39,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:06:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:06:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 35 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-23 18:06:39,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:06:39,900 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-23 18:06:39,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:06:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:06:39,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:06:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:06:40,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:06:40,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-23 18:06:40,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:06:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:06:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:06:40,156 INFO L87 Difference]: Start difference. First operand 11436 states and 15909 transitions. Second operand 5 states. [2018-10-23 18:06:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:06:54,905 INFO L93 Difference]: Finished difference Result 43401 states and 61089 transitions. [2018-10-23 18:06:54,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:06:54,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2018-10-23 18:06:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:06:54,984 INFO L225 Difference]: With dead ends: 43401 [2018-10-23 18:06:54,985 INFO L226 Difference]: Without dead ends: 32755 [2018-10-23 18:06:55,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:06:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32755 states. [2018-10-23 18:06:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32755 to 25621. [2018-10-23 18:06:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25621 states. [2018-10-23 18:06:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25621 states to 25621 states and 33098 transitions. [2018-10-23 18:06:55,512 INFO L78 Accepts]: Start accepts. Automaton has 25621 states and 33098 transitions. Word has length 185 [2018-10-23 18:06:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:06:55,512 INFO L481 AbstractCegarLoop]: Abstraction has 25621 states and 33098 transitions. [2018-10-23 18:06:55,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:06:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 25621 states and 33098 transitions. [2018-10-23 18:06:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-23 18:06:55,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:06:55,517 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:06:55,517 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:06:55,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:06:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2063229366, now seen corresponding path program 1 times [2018-10-23 18:06:55,518 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:06:55,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:06:55,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:06:55,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:06:55,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:06:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:06:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-10-23 18:06:55,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:06:55,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:06:55,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:06:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:06:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:06:55,774 INFO L87 Difference]: Start difference. First operand 25621 states and 33098 transitions. Second operand 3 states. [2018-10-23 18:07:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:07:03,370 INFO L93 Difference]: Finished difference Result 73301 states and 95285 transitions. [2018-10-23 18:07:03,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:07:03,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2018-10-23 18:07:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:07:03,456 INFO L225 Difference]: With dead ends: 73301 [2018-10-23 18:07:03,456 INFO L226 Difference]: Without dead ends: 48470 [2018-10-23 18:07:03,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:07:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48470 states. [2018-10-23 18:07:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48470 to 48469. [2018-10-23 18:07:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48469 states. [2018-10-23 18:07:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48469 states to 48469 states and 58804 transitions. [2018-10-23 18:07:04,089 INFO L78 Accepts]: Start accepts. Automaton has 48469 states and 58804 transitions. Word has length 196 [2018-10-23 18:07:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:07:04,090 INFO L481 AbstractCegarLoop]: Abstraction has 48469 states and 58804 transitions. [2018-10-23 18:07:04,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:07:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 48469 states and 58804 transitions. [2018-10-23 18:07:04,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-23 18:07:04,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:07:04,099 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:07:04,099 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:07:04,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:07:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1663665131, now seen corresponding path program 1 times [2018-10-23 18:07:04,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:07:04,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:07:04,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:07:04,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:07:04,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:07:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:07:04,756 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 6 [2018-10-23 18:07:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 192 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-23 18:07:04,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:07:04,885 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-23 18:07:04,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:07:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:07:05,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:07:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 18:07:05,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:07:05,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 18:07:05,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:07:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:07:05,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:07:05,182 INFO L87 Difference]: Start difference. First operand 48469 states and 58804 transitions. Second operand 4 states. [2018-10-23 18:07:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:07:15,967 INFO L93 Difference]: Finished difference Result 114312 states and 136549 transitions. [2018-10-23 18:07:15,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:07:15,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2018-10-23 18:07:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:07:16,054 INFO L225 Difference]: With dead ends: 114312 [2018-10-23 18:07:16,055 INFO L226 Difference]: Without dead ends: 66633 [2018-10-23 18:07:16,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:07:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66633 states. [2018-10-23 18:07:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66633 to 57138. [2018-10-23 18:07:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57138 states. [2018-10-23 18:07:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57138 states to 57138 states and 68104 transitions. [2018-10-23 18:07:16,799 INFO L78 Accepts]: Start accepts. Automaton has 57138 states and 68104 transitions. Word has length 313 [2018-10-23 18:07:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:07:16,800 INFO L481 AbstractCegarLoop]: Abstraction has 57138 states and 68104 transitions. [2018-10-23 18:07:16,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:07:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 57138 states and 68104 transitions. [2018-10-23 18:07:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-23 18:07:16,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:07:16,811 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:07:16,811 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:07:16,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:07:16,811 INFO L82 PathProgramCache]: Analyzing trace with hash -878020386, now seen corresponding path program 1 times [2018-10-23 18:07:16,811 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:07:16,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:07:16,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:07:16,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:07:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:07:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:07:17,286 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 18:07:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 18:07:17,396 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:07:17,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:07:17,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:07:17,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:07:17,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:07:17,397 INFO L87 Difference]: Start difference. First operand 57138 states and 68104 transitions. Second operand 4 states. [2018-10-23 18:07:28,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:07:28,252 INFO L93 Difference]: Finished difference Result 122940 states and 146167 transitions. [2018-10-23 18:07:28,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:07:28,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2018-10-23 18:07:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:07:28,306 INFO L225 Difference]: With dead ends: 122940 [2018-10-23 18:07:28,306 INFO L226 Difference]: Without dead ends: 57862 [2018-10-23 18:07:28,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:07:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57862 states. [2018-10-23 18:07:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57862 to 50769. [2018-10-23 18:07:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50769 states. [2018-10-23 18:07:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50769 states to 50769 states and 59099 transitions. [2018-10-23 18:07:28,947 INFO L78 Accepts]: Start accepts. Automaton has 50769 states and 59099 transitions. Word has length 342 [2018-10-23 18:07:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:07:28,948 INFO L481 AbstractCegarLoop]: Abstraction has 50769 states and 59099 transitions. [2018-10-23 18:07:28,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:07:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50769 states and 59099 transitions. [2018-10-23 18:07:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-23 18:07:28,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:07:28,956 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:07:28,957 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:07:28,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:07:28,957 INFO L82 PathProgramCache]: Analyzing trace with hash 673085932, now seen corresponding path program 1 times [2018-10-23 18:07:28,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:07:28,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:07:28,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:07:28,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:07:28,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:07:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:07:29,318 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 18:07:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 18:07:29,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:07:29,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:07:29,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:07:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:07:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:07:29,428 INFO L87 Difference]: Start difference. First operand 50769 states and 59099 transitions. Second operand 4 states. [2018-10-23 18:07:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:07:40,798 INFO L93 Difference]: Finished difference Result 130717 states and 153407 transitions. [2018-10-23 18:07:40,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:07:40,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 362 [2018-10-23 18:07:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:07:40,903 INFO L225 Difference]: With dead ends: 130717 [2018-10-23 18:07:40,903 INFO L226 Difference]: Without dead ends: 80738 [2018-10-23 18:07:40,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:07:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80738 states. [2018-10-23 18:07:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80738 to 78349. [2018-10-23 18:07:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78349 states. [2018-10-23 18:07:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78349 states to 78349 states and 89264 transitions. [2018-10-23 18:07:41,732 INFO L78 Accepts]: Start accepts. Automaton has 78349 states and 89264 transitions. Word has length 362 [2018-10-23 18:07:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:07:41,732 INFO L481 AbstractCegarLoop]: Abstraction has 78349 states and 89264 transitions. [2018-10-23 18:07:41,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:07:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 78349 states and 89264 transitions. [2018-10-23 18:07:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-10-23 18:07:41,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:07:41,743 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:07:41,743 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:07:41,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:07:41,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1646142113, now seen corresponding path program 1 times [2018-10-23 18:07:41,743 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:07:41,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:07:41,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:07:41,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:07:41,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:07:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:07:42,180 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-23 18:07:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 445 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-10-23 18:07:42,288 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:07:42,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:07:42,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:07:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:07:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:07:42,290 INFO L87 Difference]: Start difference. First operand 78349 states and 89264 transitions. Second operand 5 states. [2018-10-23 18:08:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:08:00,747 INFO L93 Difference]: Finished difference Result 284611 states and 323869 transitions. [2018-10-23 18:08:00,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:08:00,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 377 [2018-10-23 18:08:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:08:00,988 INFO L225 Difference]: With dead ends: 284611 [2018-10-23 18:08:00,989 INFO L226 Difference]: Without dead ends: 207049 [2018-10-23 18:08:01,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:08:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207049 states. [2018-10-23 18:08:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207049 to 195845. [2018-10-23 18:08:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195845 states. [2018-10-23 18:08:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195845 states to 195845 states and 218807 transitions. [2018-10-23 18:08:03,478 INFO L78 Accepts]: Start accepts. Automaton has 195845 states and 218807 transitions. Word has length 377 [2018-10-23 18:08:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:08:03,479 INFO L481 AbstractCegarLoop]: Abstraction has 195845 states and 218807 transitions. [2018-10-23 18:08:03,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:08:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 195845 states and 218807 transitions. [2018-10-23 18:08:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2018-10-23 18:08:03,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:08:03,490 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:08:03,490 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:08:03,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:08:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash -816251699, now seen corresponding path program 1 times [2018-10-23 18:08:03,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:08:03,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:08:03,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:08:03,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:08:03,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:08:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:08:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 709 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-10-23 18:08:03,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:08:03,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:08:03,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:08:03,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:08:03,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:08:03,882 INFO L87 Difference]: Start difference. First operand 195845 states and 218807 transitions. Second operand 4 states. [2018-10-23 18:08:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:08:14,206 INFO L93 Difference]: Finished difference Result 388574 states and 434333 transitions. [2018-10-23 18:08:14,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:08:14,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2018-10-23 18:08:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:08:15,711 INFO L225 Difference]: With dead ends: 388574 [2018-10-23 18:08:15,711 INFO L226 Difference]: Without dead ends: 193519 [2018-10-23 18:08:15,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:08:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193519 states. [2018-10-23 18:08:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193519 to 191900. [2018-10-23 18:08:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191900 states. [2018-10-23 18:08:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191900 states to 191900 states and 207873 transitions. [2018-10-23 18:08:17,304 INFO L78 Accepts]: Start accepts. Automaton has 191900 states and 207873 transitions. Word has length 467 [2018-10-23 18:08:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:08:17,305 INFO L481 AbstractCegarLoop]: Abstraction has 191900 states and 207873 transitions. [2018-10-23 18:08:17,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:08:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 191900 states and 207873 transitions. [2018-10-23 18:08:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-10-23 18:08:17,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:08:17,314 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:08:17,315 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:08:17,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:08:17,315 INFO L82 PathProgramCache]: Analyzing trace with hash 752697744, now seen corresponding path program 1 times [2018-10-23 18:08:17,315 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:08:17,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:08:17,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:08:17,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:08:17,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:08:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:08:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-10-23 18:08:17,691 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:08:17,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:08:17,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:08:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:08:17,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:08:17,692 INFO L87 Difference]: Start difference. First operand 191900 states and 207873 transitions. Second operand 4 states. [2018-10-23 18:08:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:08:31,415 INFO L93 Difference]: Finished difference Result 429655 states and 465949 transitions. [2018-10-23 18:08:31,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:08:31,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2018-10-23 18:08:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:08:31,674 INFO L225 Difference]: With dead ends: 429655 [2018-10-23 18:08:31,674 INFO L226 Difference]: Without dead ends: 238545 [2018-10-23 18:08:31,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:08:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238545 states. [2018-10-23 18:08:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238545 to 236838. [2018-10-23 18:08:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236838 states. [2018-10-23 18:08:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236838 states to 236838 states and 256094 transitions. [2018-10-23 18:08:34,667 INFO L78 Accepts]: Start accepts. Automaton has 236838 states and 256094 transitions. Word has length 478 [2018-10-23 18:08:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:08:34,667 INFO L481 AbstractCegarLoop]: Abstraction has 236838 states and 256094 transitions. [2018-10-23 18:08:34,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:08:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 236838 states and 256094 transitions. [2018-10-23 18:08:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2018-10-23 18:08:34,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:08:34,682 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 18:08:34,683 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:08:34,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:08:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1854620957, now seen corresponding path program 1 times [2018-10-23 18:08:34,683 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:08:34,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:08:34,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:08:34,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:08:34,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:08:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:08:35,430 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-23 18:08:35,701 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-23 18:08:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 369 proven. 18 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-23 18:08:37,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:08:37,580 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:08:37,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:08:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:08:37,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:08:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-10-23 18:08:38,051 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:08:38,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-23 18:08:38,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 18:08:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 18:08:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:08:38,053 INFO L87 Difference]: Start difference. First operand 236838 states and 256094 transitions. Second operand 8 states. [2018-10-23 18:08:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:08:55,010 INFO L93 Difference]: Finished difference Result 461177 states and 499443 transitions. [2018-10-23 18:08:55,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:08:55,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 578 [2018-10-23 18:08:55,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:08:55,255 INFO L225 Difference]: With dead ends: 461177 [2018-10-23 18:08:55,255 INFO L226 Difference]: Without dead ends: 225129 [2018-10-23 18:08:55,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 580 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:08:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225129 states. [2018-10-23 18:08:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225129 to 218660. [2018-10-23 18:08:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218660 states. [2018-10-23 18:08:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218660 states to 218660 states and 230656 transitions. [2018-10-23 18:08:57,731 INFO L78 Accepts]: Start accepts. Automaton has 218660 states and 230656 transitions. Word has length 578 [2018-10-23 18:08:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:08:57,732 INFO L481 AbstractCegarLoop]: Abstraction has 218660 states and 230656 transitions. [2018-10-23 18:08:57,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 18:08:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 218660 states and 230656 transitions. [2018-10-23 18:08:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2018-10-23 18:08:57,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:08:57,780 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 18:08:57,780 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:08:57,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:08:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1872031008, now seen corresponding path program 1 times [2018-10-23 18:08:57,781 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:08:57,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:08:57,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:08:57,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:08:57,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:08:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:08:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 1162 proven. 0 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2018-10-23 18:08:59,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:08:59,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:08:59,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:08:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:08:59,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:08:59,657 INFO L87 Difference]: Start difference. First operand 218660 states and 230656 transitions. Second operand 3 states. [2018-10-23 18:09:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:09:04,866 INFO L93 Difference]: Finished difference Result 435728 states and 459606 transitions. [2018-10-23 18:09:04,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:09:04,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 910 [2018-10-23 18:09:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:09:05,098 INFO L225 Difference]: With dead ends: 435728 [2018-10-23 18:09:05,098 INFO L226 Difference]: Without dead ends: 217856 [2018-10-23 18:09:05,195 INFO L605 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 [2018-10-23 18:09:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217856 states. [2018-10-23 18:09:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217856 to 217856. [2018-10-23 18:09:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217856 states. [2018-10-23 18:09:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217856 states to 217856 states and 229719 transitions. [2018-10-23 18:09:07,597 INFO L78 Accepts]: Start accepts. Automaton has 217856 states and 229719 transitions. Word has length 910 [2018-10-23 18:09:07,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:09:07,598 INFO L481 AbstractCegarLoop]: Abstraction has 217856 states and 229719 transitions. [2018-10-23 18:09:07,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:09:07,598 INFO L276 IsEmpty]: Start isEmpty. Operand 217856 states and 229719 transitions. [2018-10-23 18:09:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 912 [2018-10-23 18:09:07,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:09:07,634 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:09:07,635 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:09:07,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:09:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash 958306381, now seen corresponding path program 1 times [2018-10-23 18:09:07,635 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:09:07,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:09:07,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:09:07,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:09:07,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:09:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:09:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2018-10-23 18:09:09,913 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:09:09,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:09:09,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:09:09,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:09:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:09:09,916 INFO L87 Difference]: Start difference. First operand 217856 states and 229719 transitions. Second operand 4 states. Received shutdown request... [2018-10-23 18:09:19,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:09:19,736 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:09:19,741 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:09:19,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:09:19 BoogieIcfgContainer [2018-10-23 18:09:19,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:09:19,743 INFO L168 Benchmark]: Toolchain (without parser) took 226889.58 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-23 18:09:19,745 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 18:09:19,745 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2528.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-10-23 18:09:19,746 INFO L168 Benchmark]: Boogie Procedure Inliner took 827.42 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 835.7 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2018-10-23 18:09:19,747 INFO L168 Benchmark]: Boogie Preprocessor took 464.27 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 68.0 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. [2018-10-23 18:09:19,748 INFO L168 Benchmark]: RCFGBuilder took 12888.80 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 231.2 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 55.3 MB). Peak memory consumption was 594.5 MB. Max. memory is 7.1 GB. [2018-10-23 18:09:19,749 INFO L168 Benchmark]: TraceAbstraction took 210174.74 ms. Allocated memory was 2.6 GB in the beginning and 4.5 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.7 GB in the end (delta: -602.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-23 18:09:19,754 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2528.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 827.42 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 835.7 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 464.27 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 68.0 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12888.80 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 231.2 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 55.3 MB). Peak memory consumption was 594.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210174.74 ms. Allocated memory was 2.6 GB in the beginning and 4.5 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.7 GB in the end (delta: -602.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 69). Cancelled while BasicCegarLoop was constructing difference of abstraction (217856states) and FLOYD_HOARE automaton (currently 4 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (355390 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 210.0s OverallTime, 14 OverallIterations, 8 TraceHistogramMax, 180.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10008 SDtfs, 34271 SDslu, 3634 SDs, 0 SdLazy, 68789 SolverSat, 15971 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 146.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1248 GetRequests, 1201 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=236838occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 15.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 49554 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 6594 NumberOfCodeBlocks, 6594 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 6576 ConstructedInterpolants, 0 QuantifiedInterpolants, 7923027 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1619 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 18 InterpolantComputations, 14 PerfectInterpolantSequences, 8501/8593 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown