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/Problem19_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:33:44,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:33:44,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:33:44,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:33:44,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:33:44,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:33:44,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:33:44,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:33:44,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:33:44,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:33:44,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:33:44,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:33:44,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:33:44,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:33:44,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:33:44,801 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 23:33:44,817 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:33:44,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:33:44,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:33:44,818 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:33:44,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:33:44,819 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:33:44,819 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:33:44,819 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:33:44,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:33:44,820 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:33:44,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:33:44,821 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:33:44,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:33:44,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:33:44,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:33:44,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:33:44,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:33:44,822 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:33:44,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:33:44,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:33:44,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:33:44,823 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:33:44,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:33:44,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:33:44,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:33:44,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:33:44,824 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:33:44,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:33:44,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:33:44,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:33:44,853 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:33:44,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:33:44,869 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:33:44,871 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:33:44,871 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:33:44,872 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2019-09-09 23:33:44,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ab361dc/42f4821f24ba48ba8507f188d52ba1a9/FLAGc4c86284a [2019-09-09 23:33:45,808 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:33:45,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2019-09-09 23:33:45,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ab361dc/42f4821f24ba48ba8507f188d52ba1a9/FLAGc4c86284a [2019-09-09 23:33:46,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ab361dc/42f4821f24ba48ba8507f188d52ba1a9 [2019-09-09 23:33:46,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:33:46,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:33:46,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:33:46,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:33:46,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:33:46,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:33:46" (1/1) ... [2019-09-09 23:33:46,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbe1c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:46, skipping insertion in model container [2019-09-09 23:33:46,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:33:46" (1/1) ... [2019-09-09 23:33:46,297 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:33:46,555 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:33:48,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:33:48,814 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:33:49,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:33:50,003 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:33:50,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50 WrapperNode [2019-09-09 23:33:50,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:33:50,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:33:50,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:33:50,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:33:50,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (1/1) ... [2019-09-09 23:33:50,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (1/1) ... [2019-09-09 23:33:50,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (1/1) ... [2019-09-09 23:33:50,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (1/1) ... [2019-09-09 23:33:50,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (1/1) ... [2019-09-09 23:33:50,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (1/1) ... [2019-09-09 23:33:50,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (1/1) ... [2019-09-09 23:33:50,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:33:50,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:33:50,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:33:50,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:33:50,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (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 23:33:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:33:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:33:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:33:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:33:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:33:50,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:33:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:33:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:33:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:33:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:33:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:33:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:33:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:33:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:33:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:33:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:33:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:33:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:33:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:33:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:33:50,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:34:01,793 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:34:01,794 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:34:01,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:34:01 BoogieIcfgContainer [2019-09-09 23:34:01,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:34:01,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:34:01,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:34:01,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:34:01,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:33:46" (1/3) ... [2019-09-09 23:34:01,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdc499c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:34:01, skipping insertion in model container [2019-09-09 23:34:01,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:33:50" (2/3) ... [2019-09-09 23:34:01,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdc499c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:34:01, skipping insertion in model container [2019-09-09 23:34:01,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:34:01" (3/3) ... [2019-09-09 23:34:01,818 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2019-09-09 23:34:01,829 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:34:01,840 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:34:01,857 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:34:01,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:34:01,887 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:34:01,887 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:34:01,888 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:34:01,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:34:01,888 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:34:01,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:34:01,888 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:34:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:34:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 23:34:01,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:34:01,950 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] [2019-09-09 23:34:01,952 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:34:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:34:01,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1129276774, now seen corresponding path program 1 times [2019-09-09 23:34:01,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:34:02,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:34:02,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:34:02,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:34:02,009 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:34:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:34:02,217 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 23:34:02,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:34:02,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:34:02,220 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:34:02,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:34:02,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:34:02,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:34:02,244 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:34:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:34:14,736 INFO L93 Difference]: Finished difference Result 3224 states and 5806 transitions. [2019-09-09 23:34:14,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:34:14,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-09-09 23:34:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:34:14,783 INFO L225 Difference]: With dead ends: 3224 [2019-09-09 23:34:14,783 INFO L226 Difference]: Without dead ends: 3156 [2019-09-09 23:34:14,785 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 23:34:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2019-09-09 23:34:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 3153. [2019-09-09 23:34:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2019-09-09 23:34:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5691 transitions. [2019-09-09 23:34:14,987 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5691 transitions. Word has length 28 [2019-09-09 23:34:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:34:14,988 INFO L475 AbstractCegarLoop]: Abstraction has 3153 states and 5691 transitions. [2019-09-09 23:34:14,988 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:34:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5691 transitions. [2019-09-09 23:34:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-09 23:34:14,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:34:14,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:34:14,994 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:34:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:34:14,995 INFO L82 PathProgramCache]: Analyzing trace with hash -905322489, now seen corresponding path program 1 times [2019-09-09 23:34:14,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:34:14,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:34:14,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:34:14,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:34:14,997 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:34:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:34:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:34:15,251 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:34:15,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:34:15,251 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:34:15,253 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:34:15,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:34:15,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:34:15,254 INFO L87 Difference]: Start difference. First operand 3153 states and 5691 transitions. Second operand 6 states. [2019-09-09 23:34:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:34:29,360 INFO L93 Difference]: Finished difference Result 4698 states and 7866 transitions. [2019-09-09 23:34:29,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:34:29,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2019-09-09 23:34:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:34:29,389 INFO L225 Difference]: With dead ends: 4698 [2019-09-09 23:34:29,389 INFO L226 Difference]: Without dead ends: 4698 [2019-09-09 23:34:29,391 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 23:34:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2019-09-09 23:34:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4645. [2019-09-09 23:34:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4645 states. [2019-09-09 23:34:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 7795 transitions. [2019-09-09 23:34:29,535 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 7795 transitions. Word has length 99 [2019-09-09 23:34:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:34:29,536 INFO L475 AbstractCegarLoop]: Abstraction has 4645 states and 7795 transitions. [2019-09-09 23:34:29,537 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:34:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 7795 transitions. [2019-09-09 23:34:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-09 23:34:29,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:34:29,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:34:29,550 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:34:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:34:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1688068060, now seen corresponding path program 1 times [2019-09-09 23:34:29,551 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:34:29,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:34:29,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:34:29,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:34:29,553 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:34:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:34:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:34:29,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:34:29,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:34:29,750 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:34:29,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:34:29,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:34:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:34:29,751 INFO L87 Difference]: Start difference. First operand 4645 states and 7795 transitions. Second operand 6 states. [2019-09-09 23:34:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:34:45,839 INFO L93 Difference]: Finished difference Result 9315 states and 15688 transitions. [2019-09-09 23:34:45,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:34:45,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-09-09 23:34:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:34:45,900 INFO L225 Difference]: With dead ends: 9315 [2019-09-09 23:34:45,901 INFO L226 Difference]: Without dead ends: 9315 [2019-09-09 23:34:45,901 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 23:34:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2019-09-09 23:34:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 9121. [2019-09-09 23:34:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9121 states. [2019-09-09 23:34:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9121 states to 9121 states and 15295 transitions. [2019-09-09 23:34:46,191 INFO L78 Accepts]: Start accepts. Automaton has 9121 states and 15295 transitions. Word has length 101 [2019-09-09 23:34:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:34:46,195 INFO L475 AbstractCegarLoop]: Abstraction has 9121 states and 15295 transitions. [2019-09-09 23:34:46,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:34:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 9121 states and 15295 transitions. [2019-09-09 23:34:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 23:34:46,203 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:34:46,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:34:46,204 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:34:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:34:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1014192901, now seen corresponding path program 1 times [2019-09-09 23:34:46,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:34:46,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:34:46,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:34:46,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:34:46,207 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:34:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:34:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:34:46,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:34:46,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:34:46,423 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:34:46,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:34:46,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:34:46,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:34:46,425 INFO L87 Difference]: Start difference. First operand 9121 states and 15295 transitions. Second operand 6 states. [2019-09-09 23:35:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:35:15,654 INFO L93 Difference]: Finished difference Result 26844 states and 42590 transitions. [2019-09-09 23:35:15,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:35:15,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-09-09 23:35:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:35:15,778 INFO L225 Difference]: With dead ends: 26844 [2019-09-09 23:35:15,779 INFO L226 Difference]: Without dead ends: 26844 [2019-09-09 23:35:15,779 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 23:35:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26844 states. [2019-09-09 23:35:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26844 to 26785. [2019-09-09 23:35:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26785 states. [2019-09-09 23:35:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26785 states to 26785 states and 42356 transitions. [2019-09-09 23:35:16,447 INFO L78 Accepts]: Start accepts. Automaton has 26785 states and 42356 transitions. Word has length 123 [2019-09-09 23:35:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:35:16,448 INFO L475 AbstractCegarLoop]: Abstraction has 26785 states and 42356 transitions. [2019-09-09 23:35:16,448 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:35:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 26785 states and 42356 transitions. [2019-09-09 23:35:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-09 23:35:16,455 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:35:16,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:35:16,456 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:35:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:35:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1571483433, now seen corresponding path program 1 times [2019-09-09 23:35:16,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:35:16,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:35:16,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:35:16,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:35:16,458 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:35:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:35:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:35:16,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:35:16,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:35:16,664 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:35:16,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:35:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:35:16,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:35:16,667 INFO L87 Difference]: Start difference. First operand 26785 states and 42356 transitions. Second operand 5 states. [2019-09-09 23:35:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:35:32,954 INFO L93 Difference]: Finished difference Result 54501 states and 83409 transitions. [2019-09-09 23:35:32,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:35:32,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-09-09 23:35:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:35:33,165 INFO L225 Difference]: With dead ends: 54501 [2019-09-09 23:35:33,165 INFO L226 Difference]: Without dead ends: 54501 [2019-09-09 23:35:33,166 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 23:35:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54501 states. [2019-09-09 23:35:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54501 to 53944. [2019-09-09 23:35:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53944 states. [2019-09-09 23:35:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53944 states to 53944 states and 80603 transitions. [2019-09-09 23:35:34,597 INFO L78 Accepts]: Start accepts. Automaton has 53944 states and 80603 transitions. Word has length 132 [2019-09-09 23:35:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:35:34,600 INFO L475 AbstractCegarLoop]: Abstraction has 53944 states and 80603 transitions. [2019-09-09 23:35:34,600 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:35:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 53944 states and 80603 transitions. [2019-09-09 23:35:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-09 23:35:34,604 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:35:34,605 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:35:34,606 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:35:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:35:34,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1144156088, now seen corresponding path program 1 times [2019-09-09 23:35:34,608 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:35:34,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:35:34,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:35:34,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:35:34,610 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:35:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:35:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:35:34,854 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:35:34,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:35:34,855 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:35:34,856 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:35:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:35:34,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:35:34,857 INFO L87 Difference]: Start difference. First operand 53944 states and 80603 transitions. Second operand 6 states. [2019-09-09 23:35:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:35:51,654 INFO L93 Difference]: Finished difference Result 70876 states and 107162 transitions. [2019-09-09 23:35:51,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:35:51,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-09-09 23:35:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:35:51,969 INFO L225 Difference]: With dead ends: 70876 [2019-09-09 23:35:51,969 INFO L226 Difference]: Without dead ends: 70876 [2019-09-09 23:35:51,970 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 23:35:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70876 states. [2019-09-09 23:35:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70876 to 70649. [2019-09-09 23:35:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70649 states. [2019-09-09 23:35:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70649 states to 70649 states and 104478 transitions. [2019-09-09 23:35:55,950 INFO L78 Accepts]: Start accepts. Automaton has 70649 states and 104478 transitions. Word has length 160 [2019-09-09 23:35:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:35:55,950 INFO L475 AbstractCegarLoop]: Abstraction has 70649 states and 104478 transitions. [2019-09-09 23:35:55,951 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:35:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 70649 states and 104478 transitions. [2019-09-09 23:35:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-09-09 23:35:55,958 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:35:55,959 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 23:35:55,959 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:35:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:35:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2053654242, now seen corresponding path program 1 times [2019-09-09 23:35:55,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:35:55,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:35:55,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:35:55,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:35:55,964 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:35:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:35:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 42 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 23:35:56,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:35:56,103 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:35:56,105 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 198 with the following transitions: [2019-09-09 23:35:56,107 INFO L207 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5358], [5360], [5363], [5371], [5379], [5387], [5395], [5403], [5411], [5419], [5427], [5435], [5443], [5451], [5459], [5467], [5475], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5722], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5877], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:35:56,192 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:35:56,192 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:36:07,862 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:36:07,864 INFO L272 AbstractInterpreter]: Visited 103 different actions 103 times. Never merged. Never widened. Performed 250 root evaluator evaluations with a maximum evaluation depth of 14. Performed 250 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:36:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:36:07,868 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:36:13,910 INFO L227 lantSequenceWeakener]: Weakened 176 states. On average, predicates are now at 75.38% of their original sizes. [2019-09-09 23:36:13,910 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:36:14,029 INFO L420 sIntCurrentIteration]: We unified 196 AI predicates to 196 [2019-09-09 23:36:14,029 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:36:14,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:36:14,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:36:14,031 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:36:14,031 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:36:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:36:14,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:36:14,032 INFO L87 Difference]: Start difference. First operand 70649 states and 104478 transitions. Second operand 10 states. [2019-09-09 23:39:30,302 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.