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/Problem13_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:13:28,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:13:28,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:13:28,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:13:28,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:13:28,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:13:28,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:13:28,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:13:28,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:13:28,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:13:28,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:13:28,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:13:28,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:13:28,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:13:28,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:13:28,153 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 [2019-09-09 17:13:28,182 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:13:28,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:13:28,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:13:28,183 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:13:28,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:13:28,184 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:13:28,184 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:13:28,184 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:13:28,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:13:28,185 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:13:28,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:13:28,186 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:13:28,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:13:28,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:13:28,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:13:28,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:13:28,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:13:28,188 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:13:28,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:13:28,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:13:28,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:13:28,189 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:13:28,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:13:28,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:13:28,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:13:28,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:13:28,190 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:13:28,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:13:28,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:13:28,191 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:13:28,221 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:13:28,235 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:13:28,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:13:28,240 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:13:28,240 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:13:28,241 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label18.c [2019-09-09 17:13:28,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9e2f897e/ed9fe89d0d4441938eda8ce78d6b7072/FLAG1ffd60f41 [2019-09-09 17:13:29,138 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:13:29,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label18.c [2019-09-09 17:13:29,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9e2f897e/ed9fe89d0d4441938eda8ce78d6b7072/FLAG1ffd60f41 [2019-09-09 17:13:29,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9e2f897e/ed9fe89d0d4441938eda8ce78d6b7072 [2019-09-09 17:13:29,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:13:29,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:13:29,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:13:29,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:13:29,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:13:29,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:13:29" (1/1) ... [2019-09-09 17:13:29,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6501343a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:29, skipping insertion in model container [2019-09-09 17:13:29,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:13:29" (1/1) ... [2019-09-09 17:13:29,695 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:13:29,871 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:13:31,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:13:31,601 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:13:32,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:13:32,369 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:13:32,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32 WrapperNode [2019-09-09 17:13:32,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:13:32,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:13:32,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:13:32,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:13:32,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (1/1) ... [2019-09-09 17:13:32,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (1/1) ... [2019-09-09 17:13:32,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (1/1) ... [2019-09-09 17:13:32,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (1/1) ... [2019-09-09 17:13:32,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (1/1) ... [2019-09-09 17:13:32,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (1/1) ... [2019-09-09 17:13:32,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (1/1) ... [2019-09-09 17:13:32,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:13:32,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:13:32,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:13:32,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:13:32,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (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 [2019-09-09 17:13:32,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:13:32,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:13:32,836 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:13:32,836 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:13:32,836 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:13:32,837 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:13:32,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:13:32,837 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:13:32,837 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:13:32,837 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:13:32,838 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:13:32,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:13:32,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:13:32,838 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:13:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:13:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:13:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:13:40,625 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:13:40,626 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:13:40,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:13:40 BoogieIcfgContainer [2019-09-09 17:13:40,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:13:40,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:13:40,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:13:40,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:13:40,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:13:29" (1/3) ... [2019-09-09 17:13:40,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7db060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:13:40, skipping insertion in model container [2019-09-09 17:13:40,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:13:32" (2/3) ... [2019-09-09 17:13:40,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7db060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:13:40, skipping insertion in model container [2019-09-09 17:13:40,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:13:40" (3/3) ... [2019-09-09 17:13:40,639 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label18.c [2019-09-09 17:13:40,649 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:13:40,661 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:13:40,681 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:13:40,714 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:13:40,715 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:13:40,715 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:13:40,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:13:40,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:13:40,715 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:13:40,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:13:40,715 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:13:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:13:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-09 17:13:40,785 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:13:40,786 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:13:40,789 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:13:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:13:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash 597964976, now seen corresponding path program 1 times [2019-09-09 17:13:40,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:13:40,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:40,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:13:40,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:40,842 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:13:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:13:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:13:41,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:13:41,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:13:41,166 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:13:41,172 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:13:41,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:13:41,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:13:41,191 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:13:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:13:47,820 INFO L93 Difference]: Finished difference Result 1981 states and 3232 transitions. [2019-09-09 17:13:47,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:13:47,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-09-09 17:13:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:13:47,861 INFO L225 Difference]: With dead ends: 1981 [2019-09-09 17:13:47,861 INFO L226 Difference]: Without dead ends: 1913 [2019-09-09 17:13:47,863 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:13:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2019-09-09 17:13:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2019-09-09 17:13:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1912 states. [2019-09-09 17:13:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3141 transitions. [2019-09-09 17:13:48,017 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3141 transitions. Word has length 69 [2019-09-09 17:13:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:13:48,018 INFO L475 AbstractCegarLoop]: Abstraction has 1912 states and 3141 transitions. [2019-09-09 17:13:48,018 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:13:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3141 transitions. [2019-09-09 17:13:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-09 17:13:48,024 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:13:48,025 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:13:48,025 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:13:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:13:48,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1633383061, now seen corresponding path program 1 times [2019-09-09 17:13:48,026 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:13:48,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:48,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:13:48,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:48,028 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:13:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:13:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:13:48,188 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:13:48,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:13:48,188 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:13:48,190 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:13:48,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:13:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:13:48,191 INFO L87 Difference]: Start difference. First operand 1912 states and 3141 transitions. Second operand 5 states. [2019-09-09 17:13:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:13:58,662 INFO L93 Difference]: Finished difference Result 3681 states and 5546 transitions. [2019-09-09 17:13:58,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:13:58,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2019-09-09 17:13:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:13:58,694 INFO L225 Difference]: With dead ends: 3681 [2019-09-09 17:13:58,694 INFO L226 Difference]: Without dead ends: 3681 [2019-09-09 17:13:58,695 INFO L628 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 [2019-09-09 17:13:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2019-09-09 17:13:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3601. [2019-09-09 17:13:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3601 states. [2019-09-09 17:13:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5413 transitions. [2019-09-09 17:13:58,819 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5413 transitions. Word has length 144 [2019-09-09 17:13:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:13:58,822 INFO L475 AbstractCegarLoop]: Abstraction has 3601 states and 5413 transitions. [2019-09-09 17:13:58,822 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:13:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5413 transitions. [2019-09-09 17:13:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-09-09 17:13:58,834 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:13:58,834 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:13:58,835 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:13:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:13:58,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1407711183, now seen corresponding path program 1 times [2019-09-09 17:13:58,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:13:58,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:58,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:13:58,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:13:58,838 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:13:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:13:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:13:59,059 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:13:59,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:13:59,059 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:13:59,060 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:13:59,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:13:59,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:13:59,061 INFO L87 Difference]: Start difference. First operand 3601 states and 5413 transitions. Second operand 5 states. [2019-09-09 17:14:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:14:12,505 INFO L93 Difference]: Finished difference Result 7306 states and 10878 transitions. [2019-09-09 17:14:12,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:14:12,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2019-09-09 17:14:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:14:12,550 INFO L225 Difference]: With dead ends: 7306 [2019-09-09 17:14:12,551 INFO L226 Difference]: Without dead ends: 7306 [2019-09-09 17:14:12,559 INFO L628 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 [2019-09-09 17:14:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2019-09-09 17:14:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7121. [2019-09-09 17:14:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7121 states. [2019-09-09 17:14:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 10495 transitions. [2019-09-09 17:14:12,774 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 10495 transitions. Word has length 158 [2019-09-09 17:14:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:14:12,776 INFO L475 AbstractCegarLoop]: Abstraction has 7121 states and 10495 transitions. [2019-09-09 17:14:12,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:14:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 10495 transitions. [2019-09-09 17:14:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-09 17:14:12,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:14:12,780 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:14:12,780 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:14:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:14:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash 90792917, now seen corresponding path program 1 times [2019-09-09 17:14:12,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:14:12,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:12,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:14:12,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:12,783 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:14:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:14:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:14:13,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:14:13,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:14:13,018 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:14:13,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:14:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:14:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:14:13,022 INFO L87 Difference]: Start difference. First operand 7121 states and 10495 transitions. Second operand 6 states. [2019-09-09 17:14:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:14:21,671 INFO L93 Difference]: Finished difference Result 14335 states and 22341 transitions. [2019-09-09 17:14:21,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:14:21,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2019-09-09 17:14:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:14:21,757 INFO L225 Difference]: With dead ends: 14335 [2019-09-09 17:14:21,757 INFO L226 Difference]: Without dead ends: 14335 [2019-09-09 17:14:21,760 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 17:14:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14335 states. [2019-09-09 17:14:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14335 to 14126. [2019-09-09 17:14:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14126 states. [2019-09-09 17:14:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14126 states to 14126 states and 21301 transitions. [2019-09-09 17:14:22,150 INFO L78 Accepts]: Start accepts. Automaton has 14126 states and 21301 transitions. Word has length 176 [2019-09-09 17:14:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:14:22,151 INFO L475 AbstractCegarLoop]: Abstraction has 14126 states and 21301 transitions. [2019-09-09 17:14:22,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:14:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 14126 states and 21301 transitions. [2019-09-09 17:14:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-09-09 17:14:22,155 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:14:22,156 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:14:22,156 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:14:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:14:22,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1086523758, now seen corresponding path program 1 times [2019-09-09 17:14:22,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:14:22,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:22,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:14:22,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:22,158 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:14:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:14:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:14:22,359 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:14:22,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:14:22,360 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:14:22,360 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:14:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:14:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:14:22,361 INFO L87 Difference]: Start difference. First operand 14126 states and 21301 transitions. Second operand 6 states. [2019-09-09 17:14:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:14:30,813 INFO L93 Difference]: Finished difference Result 28051 states and 43352 transitions. [2019-09-09 17:14:30,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:14:30,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2019-09-09 17:14:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:14:30,966 INFO L225 Difference]: With dead ends: 28051 [2019-09-09 17:14:30,966 INFO L226 Difference]: Without dead ends: 28051 [2019-09-09 17:14:30,966 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 17:14:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28051 states. [2019-09-09 17:14:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28051 to 27931. [2019-09-09 17:14:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27931 states. [2019-09-09 17:14:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27931 states to 27931 states and 41898 transitions. [2019-09-09 17:14:31,829 INFO L78 Accepts]: Start accepts. Automaton has 27931 states and 41898 transitions. Word has length 187 [2019-09-09 17:14:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:14:31,830 INFO L475 AbstractCegarLoop]: Abstraction has 27931 states and 41898 transitions. [2019-09-09 17:14:31,830 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:14:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 27931 states and 41898 transitions. [2019-09-09 17:14:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-09-09 17:14:31,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:14:31,836 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:14:31,837 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:14:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:14:31,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1790948799, now seen corresponding path program 1 times [2019-09-09 17:14:31,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:14:31,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:31,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:14:31,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:31,840 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:14:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:14:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:14:32,117 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:14:32,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:14:32,118 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:14:32,119 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:14:32,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:14:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:14:32,120 INFO L87 Difference]: Start difference. First operand 27931 states and 41898 transitions. Second operand 6 states. [2019-09-09 17:14:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:14:39,358 INFO L93 Difference]: Finished difference Result 36125 states and 51224 transitions. [2019-09-09 17:14:39,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:14:39,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 215 [2019-09-09 17:14:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:14:39,510 INFO L225 Difference]: With dead ends: 36125 [2019-09-09 17:14:39,511 INFO L226 Difference]: Without dead ends: 36125 [2019-09-09 17:14:39,511 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 17:14:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36125 states. [2019-09-09 17:14:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36125 to 34426. [2019-09-09 17:14:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34426 states. [2019-09-09 17:14:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34426 states to 34426 states and 48593 transitions. [2019-09-09 17:14:40,355 INFO L78 Accepts]: Start accepts. Automaton has 34426 states and 48593 transitions. Word has length 215 [2019-09-09 17:14:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:14:40,356 INFO L475 AbstractCegarLoop]: Abstraction has 34426 states and 48593 transitions. [2019-09-09 17:14:40,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:14:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 34426 states and 48593 transitions. [2019-09-09 17:14:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-09-09 17:14:40,364 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:14:40,364 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:14:40,368 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:14:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:14:40,370 INFO L82 PathProgramCache]: Analyzing trace with hash -98283098, now seen corresponding path program 1 times [2019-09-09 17:14:40,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:14:40,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:40,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:14:40,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:14:40,372 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:14:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:14:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:14:40,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:14:40,617 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:14:40,618 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 265 with the following transitions: [2019-09-09 17:14:40,621 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2979], [2987], [2995], [3003], [3011], [3019], [3027], [3035], [3043], [3051], [3059], [3067], [3075], [3083], [3087], [3089], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3151], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3361], [3365], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:14:40,677 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:14:40,678 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:15:50,199 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:15:50,201 INFO L272 AbstractInterpreter]: Visited 123 different actions 123 times. Never merged. Never widened. Performed 164 root evaluator evaluations with a maximum evaluation depth of 17. Performed 164 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:15:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:15:50,206 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:16:53,849 INFO L227 lantSequenceWeakener]: Weakened 253 states. On average, predicates are now at 71.52% of their original sizes. [2019-09-09 17:16:53,849 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:16:53,907 INFO L420 sIntCurrentIteration]: We unified 263 AI predicates to 263 [2019-09-09 17:16:53,907 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:16:53,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:16:53,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:16:53,909 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:16:53,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:16:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:16:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:16:53,910 INFO L87 Difference]: Start difference. First operand 34426 states and 48593 transitions. Second operand 8 states. [2019-09-09 17:19:25,069 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.