java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:57:54,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:57:54,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:57:54,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 20:57:54,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 20:57:54,222 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:57:54,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:57:54,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:57:54,223 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:57:54,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:57:54,223 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:57:54,224 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:57:54,224 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:57:54,224 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:57:54,224 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:57:54,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:57:54,225 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:57:54,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:57:54,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:57:54,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:57:54,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:57:54,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:57:54,226 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:57:54,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:57:54,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:57:54,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:57:54,227 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:57:54,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:57:54,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:57:54,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:57:54,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:57:54,228 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:57:54,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:57:54,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:57:54,229 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:57:54,277 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:57:54,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:57:54,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:57:54,299 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:57:54,299 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:57:54,302 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-02 20:57:54,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d9b24b1/99615ee8c9124c65af1a69add6579ce3/FLAGa5503b548 [2019-10-02 20:57:55,048 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:57:55,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-02 20:57:55,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d9b24b1/99615ee8c9124c65af1a69add6579ce3/FLAGa5503b548 [2019-10-02 20:57:55,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d9b24b1/99615ee8c9124c65af1a69add6579ce3 [2019-10-02 20:57:55,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:57:55,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:57:55,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:57:55,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:57:55,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:57:55,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:57:55" (1/1) ... [2019-10-02 20:57:55,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78605420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:55, skipping insertion in model container [2019-10-02 20:57:55,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:57:55" (1/1) ... [2019-10-02 20:57:55,248 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:57:55,344 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:57:56,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:57:56,338 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:57:56,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:57:56,710 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:57:56,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56 WrapperNode [2019-10-02 20:57:56,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:57:56,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:57:56,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:57:56,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:57:56,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (1/1) ... [2019-10-02 20:57:56,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (1/1) ... [2019-10-02 20:57:56,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (1/1) ... [2019-10-02 20:57:56,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (1/1) ... [2019-10-02 20:57:56,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (1/1) ... [2019-10-02 20:57:56,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (1/1) ... [2019-10-02 20:57:56,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (1/1) ... [2019-10-02 20:57:56,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:57:56,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:57:56,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:57:56,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:57:56,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:57:57,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:57:57,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:57:57,006 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:57:57,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 20:57:57,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:57:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:57:57,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 20:57:57,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:57:57,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:57:57,010 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:57:57,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:57:57,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:57:57,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:58:00,375 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:58:00,375 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:58:00,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:58:00 BoogieIcfgContainer [2019-10-02 20:58:00,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:58:00,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:58:00,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:58:00,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:58:00,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:57:55" (1/3) ... [2019-10-02 20:58:00,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295a06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:58:00, skipping insertion in model container [2019-10-02 20:58:00,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:57:56" (2/3) ... [2019-10-02 20:58:00,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295a06f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:58:00, skipping insertion in model container [2019-10-02 20:58:00,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:58:00" (3/3) ... [2019-10-02 20:58:00,385 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2019-10-02 20:58:00,395 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:58:00,403 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:58:00,420 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:58:00,446 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:58:00,446 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:58:00,447 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:58:00,447 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:58:00,447 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:58:00,447 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:58:00,447 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:58:00,447 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:58:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-02 20:58:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 20:58:00,487 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:58:00,488 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:58:00,490 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:58:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:58:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1047931325, now seen corresponding path program 1 times [2019-10-02 20:58:00,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:58:00,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:58:00,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:58:00,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:58:00,555 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:58:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:58:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:58:00,767 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:58:00,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:58:00,768 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:58:00,774 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:58:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:58:00,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:58:00,792 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-02 20:58:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:58:06,608 INFO L93 Difference]: Finished difference Result 1123 states and 1943 transitions. [2019-10-02 20:58:06,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:58:06,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-02 20:58:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:58:06,640 INFO L225 Difference]: With dead ends: 1123 [2019-10-02 20:58:06,641 INFO L226 Difference]: Without dead ends: 1036 [2019-10-02 20:58:06,642 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:58:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-02 20:58:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-10-02 20:58:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-02 20:58:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-10-02 20:58:06,741 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 29 [2019-10-02 20:58:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:58:06,742 INFO L475 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-10-02 20:58:06,742 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:58:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-10-02 20:58:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-02 20:58:06,746 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:58:06,747 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:58:06,747 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:58:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:58:06,748 INFO L82 PathProgramCache]: Analyzing trace with hash 273136762, now seen corresponding path program 1 times [2019-10-02 20:58:06,748 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:58:06,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:58:06,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:58:06,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:58:06,750 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:58:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:58:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:58:06,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:58:06,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:58:06,915 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:58:06,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:58:06,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:58:06,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:58:06,921 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-10-02 20:58:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:58:11,033 INFO L93 Difference]: Finished difference Result 1941 states and 2980 transitions. [2019-10-02 20:58:11,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:58:11,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2019-10-02 20:58:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:58:11,056 INFO L225 Difference]: With dead ends: 1941 [2019-10-02 20:58:11,056 INFO L226 Difference]: Without dead ends: 1941 [2019-10-02 20:58:11,058 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:58:11,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2019-10-02 20:58:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1936. [2019-10-02 20:58:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2019-10-02 20:58:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2971 transitions. [2019-10-02 20:58:11,170 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2971 transitions. Word has length 98 [2019-10-02 20:58:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:58:11,171 INFO L475 AbstractCegarLoop]: Abstraction has 1936 states and 2971 transitions. [2019-10-02 20:58:11,172 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:58:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2971 transitions. [2019-10-02 20:58:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-02 20:58:11,191 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:58:11,191 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 20:58:11,192 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:58:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:58:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash 962295950, now seen corresponding path program 1 times [2019-10-02 20:58:11,193 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:58:11,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:58:11,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:58:11,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:58:11,197 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:58:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:58:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:58:11,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:58:11,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:58:11,552 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:58:11,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:58:11,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:58:11,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:58:11,556 INFO L87 Difference]: Start difference. First operand 1936 states and 2971 transitions. Second operand 5 states. [2019-10-02 20:58:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:58:16,736 INFO L93 Difference]: Finished difference Result 3566 states and 5229 transitions. [2019-10-02 20:58:16,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 20:58:16,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-10-02 20:58:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:58:16,758 INFO L225 Difference]: With dead ends: 3566 [2019-10-02 20:58:16,758 INFO L226 Difference]: Without dead ends: 3566 [2019-10-02 20:58:16,759 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 20:58:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2019-10-02 20:58:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3546. [2019-10-02 20:58:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2019-10-02 20:58:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5185 transitions. [2019-10-02 20:58:16,857 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5185 transitions. Word has length 179 [2019-10-02 20:58:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:58:16,858 INFO L475 AbstractCegarLoop]: Abstraction has 3546 states and 5185 transitions. [2019-10-02 20:58:16,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:58:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5185 transitions. [2019-10-02 20:58:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-02 20:58:16,863 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:58:16,863 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:58:16,863 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:58:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:58:16,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1613892748, now seen corresponding path program 1 times [2019-10-02 20:58:16,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:58:16,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:58:16,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:58:16,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:58:16,865 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:58:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:58:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:58:17,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:58:17,041 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:58:17,042 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 203 with the following transitions: [2019-10-02 20:58:17,045 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [213], [215], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [671], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 20:58:17,108 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:58:17,109 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:58:19,573 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:58:19,576 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 13. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 20:58:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:58:19,582 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:58:21,336 INFO L227 lantSequenceWeakener]: Weakened 183 states. On average, predicates are now at 77.7% of their original sizes. [2019-10-02 20:58:21,337 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:58:21,433 INFO L420 sIntCurrentIteration]: We unified 201 AI predicates to 201 [2019-10-02 20:58:21,433 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:58:21,434 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:58:21,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 20:58:21,435 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:58:21,436 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:58:21,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:58:21,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:58:21,437 INFO L87 Difference]: Start difference. First operand 3546 states and 5185 transitions. Second operand 10 states. [2019-10-02 20:58:28,505 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 21:12:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:12:00,413 INFO L93 Difference]: Finished difference Result 3857 states and 5509 transitions. [2019-10-02 21:12:00,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 21:12:00,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 202 [2019-10-02 21:12:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:12:00,432 INFO L225 Difference]: With dead ends: 3857 [2019-10-02 21:12:00,433 INFO L226 Difference]: Without dead ends: 3857 [2019-10-02 21:12:00,433 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-02 21:12:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2019-10-02 21:12:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3853. [2019-10-02 21:12:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3853 states. [2019-10-02 21:12:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 5501 transitions. [2019-10-02 21:12:00,523 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 5501 transitions. Word has length 202 [2019-10-02 21:12:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:12:00,523 INFO L475 AbstractCegarLoop]: Abstraction has 3853 states and 5501 transitions. [2019-10-02 21:12:00,523 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 21:12:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 5501 transitions. [2019-10-02 21:12:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-10-02 21:12:00,529 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:12:00,529 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 21:12:00,530 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:12:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:12:00,530 INFO L82 PathProgramCache]: Analyzing trace with hash 404280685, now seen corresponding path program 1 times [2019-10-02 21:12:00,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:12:00,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:12:00,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:12:00,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:12:00,532 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:12:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:12:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 71 proven. 242 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-02 21:12:00,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:12:00,779 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:12:00,780 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 298 with the following transitions: [2019-10-02 21:12:00,780 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [213], [215], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [671], [672], [676], [680], [684], [688], [691], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 21:12:00,786 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:12:00,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:12:01,894 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 21:12:02,644 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:12:02,645 INFO L272 AbstractInterpreter]: Visited 104 different actions 203 times. Merged at 4 different actions 5 times. Never widened. Performed 456 root evaluator evaluations with a maximum evaluation depth of 13. Performed 456 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 21:12:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:12:02,645 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:12:04,686 INFO L227 lantSequenceWeakener]: Weakened 294 states. On average, predicates are now at 77.46% of their original sizes. [2019-10-02 21:12:04,687 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:12:04,770 INFO L420 sIntCurrentIteration]: We unified 296 AI predicates to 296 [2019-10-02 21:12:04,770 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:12:04,771 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:12:04,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-10-02 21:12:04,771 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:12:04,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 21:12:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 21:12:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 21:12:04,772 INFO L87 Difference]: Start difference. First operand 3853 states and 5501 transitions. Second operand 11 states.