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_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:00:19,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:00:19,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:00:19,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:00:19,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:00:19,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:00:19,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:00:19,893 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 17:00:19,908 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:00:19,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:00:19,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:00:19,908 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:00:19,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:00:19,909 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:00:19,909 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:00:19,910 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:00:19,910 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:00:19,910 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:00:19,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:00:19,911 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:00:19,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:00:19,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:00:19,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:00:19,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:00:19,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:00:19,912 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:00:19,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:00:19,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:00:19,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:00:19,913 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:00:19,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:00:19,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:00:19,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:00:19,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:00:19,914 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:00:19,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:00:19,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:00:19,914 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:00:19,951 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:00:19,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:00:19,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:00:19,973 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:00:19,974 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:00:19,975 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label06.c [2019-09-09 17:00:20,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ab96d4d/cfebea7cf2dc464ca4e93681ee284759/FLAG70b783656 [2019-09-09 17:00:20,783 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:00:20,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label06.c [2019-09-09 17:00:20,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ab96d4d/cfebea7cf2dc464ca4e93681ee284759/FLAG70b783656 [2019-09-09 17:00:20,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ab96d4d/cfebea7cf2dc464ca4e93681ee284759 [2019-09-09 17:00:20,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:00:20,901 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:00:20,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:00:20,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:00:20,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:00:20,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:00:20" (1/1) ... [2019-09-09 17:00:20,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b099e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:20, skipping insertion in model container [2019-09-09 17:00:20,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:00:20" (1/1) ... [2019-09-09 17:00:20,917 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:00:21,099 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:00:23,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:00:23,222 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:00:23,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:00:23,972 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:00:23,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23 WrapperNode [2019-09-09 17:00:23,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:00:23,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:00:23,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:00:23,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:00:23,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (1/1) ... [2019-09-09 17:00:23,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (1/1) ... [2019-09-09 17:00:24,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (1/1) ... [2019-09-09 17:00:24,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (1/1) ... [2019-09-09 17:00:24,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (1/1) ... [2019-09-09 17:00:24,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (1/1) ... [2019-09-09 17:00:24,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (1/1) ... [2019-09-09 17:00:24,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:00:24,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:00:24,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:00:24,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:00:24,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (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 17:00:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:00:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:00:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:00:24,502 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:00:24,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:00:24,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:00:24,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:00:24,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:00:24,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:00:24,504 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:00:24,505 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:00:24,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:00:24,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:00:24,506 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:00:24,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:00:24,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:00:24,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:00:30,676 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:00:30,676 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:00:30,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:00:30 BoogieIcfgContainer [2019-09-09 17:00:30,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:00:30,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:00:30,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:00:30,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:00:30,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:00:20" (1/3) ... [2019-09-09 17:00:30,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172eed23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:00:30, skipping insertion in model container [2019-09-09 17:00:30,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:00:23" (2/3) ... [2019-09-09 17:00:30,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172eed23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:00:30, skipping insertion in model container [2019-09-09 17:00:30,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:00:30" (3/3) ... [2019-09-09 17:00:30,776 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label06.c [2019-09-09 17:00:30,786 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:00:30,795 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:00:30,811 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:00:30,837 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:00:30,838 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:00:30,838 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:00:30,838 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:00:30,838 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:00:30,838 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:00:30,839 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:00:30,839 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:00:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:00:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-09 17:00:30,900 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:00:30,901 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] [2019-09-09 17:00:30,903 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:00:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:00:30,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1490203272, now seen corresponding path program 1 times [2019-09-09 17:00:30,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:00:30,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:00:30,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:00:30,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:00:30,957 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:00:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:00:31,224 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 17:00:31,226 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:00:31,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:00:31,227 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:00:31,232 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:00:31,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:00:31,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:00:31,251 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:00:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:00:37,568 INFO L93 Difference]: Finished difference Result 1985 states and 3521 transitions. [2019-09-09 17:00:37,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:00:37,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-09-09 17:00:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:00:37,609 INFO L225 Difference]: With dead ends: 1985 [2019-09-09 17:00:37,610 INFO L226 Difference]: Without dead ends: 1917 [2019-09-09 17:00:37,612 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 17:00:37,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2019-09-09 17:00:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1897. [2019-09-09 17:00:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2019-09-09 17:00:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3364 transitions. [2019-09-09 17:00:37,762 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3364 transitions. Word has length 31 [2019-09-09 17:00:37,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:00:37,765 INFO L475 AbstractCegarLoop]: Abstraction has 1897 states and 3364 transitions. [2019-09-09 17:00:37,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:00:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3364 transitions. [2019-09-09 17:00:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-09 17:00:37,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:00:37,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:37,773 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:00:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:00:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -62925635, now seen corresponding path program 1 times [2019-09-09 17:00:37,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:00:37,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:00:37,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:00:37,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:00:37,776 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:00:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:00:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:00:37,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:00:37,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:00:37,977 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:00:37,979 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:00:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:00:37,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:00:37,980 INFO L87 Difference]: Start difference. First operand 1897 states and 3364 transitions. Second operand 5 states. [2019-09-09 17:00:47,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:00:47,633 INFO L93 Difference]: Finished difference Result 3676 states and 5872 transitions. [2019-09-09 17:00:47,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:00:47,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2019-09-09 17:00:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:00:47,655 INFO L225 Difference]: With dead ends: 3676 [2019-09-09 17:00:47,656 INFO L226 Difference]: Without dead ends: 3676 [2019-09-09 17:00:47,657 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 17:00:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2019-09-09 17:00:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3595. [2019-09-09 17:00:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3595 states. [2019-09-09 17:00:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 5740 transitions. [2019-09-09 17:00:47,761 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 5740 transitions. Word has length 106 [2019-09-09 17:00:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:00:47,762 INFO L475 AbstractCegarLoop]: Abstraction has 3595 states and 5740 transitions. [2019-09-09 17:00:47,762 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:00:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 5740 transitions. [2019-09-09 17:00:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-09 17:00:47,765 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:00:47,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:47,765 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:00:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:00:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1267903754, now seen corresponding path program 1 times [2019-09-09 17:00:47,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:00:47,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:00:47,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:00:47,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:00:47,768 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:00:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:00:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:00:47,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:00:47,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:00:47,899 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:00:47,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:00:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:00:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:00:47,901 INFO L87 Difference]: Start difference. First operand 3595 states and 5740 transitions. Second operand 6 states. [2019-09-09 17:00:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:00:55,566 INFO L93 Difference]: Finished difference Result 7092 states and 10572 transitions. [2019-09-09 17:00:55,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:00:55,567 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-09-09 17:00:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:00:55,601 INFO L225 Difference]: With dead ends: 7092 [2019-09-09 17:00:55,601 INFO L226 Difference]: Without dead ends: 7092 [2019-09-09 17:00:55,602 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 17:00:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2019-09-09 17:00:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 7045. [2019-09-09 17:00:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7045 states. [2019-09-09 17:00:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 10390 transitions. [2019-09-09 17:00:55,802 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 10390 transitions. Word has length 107 [2019-09-09 17:00:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:00:55,804 INFO L475 AbstractCegarLoop]: Abstraction has 7045 states and 10390 transitions. [2019-09-09 17:00:55,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:00:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 10390 transitions. [2019-09-09 17:00:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-09 17:00:55,813 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:00:55,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:55,814 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:00:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:00:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash 46580401, now seen corresponding path program 1 times [2019-09-09 17:00:55,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:00:55,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:00:55,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:00:55,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:00:55,816 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:00:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:00:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 17:00:56,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:00:56,004 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:00:56,005 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 132 with the following transitions: [2019-09-09 17:00:56,008 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], [2783], [2785], [2788], [2796], [2804], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [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], [3265], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:00:56,088 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:00:56,088 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:03:42,207 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:03:42,209 INFO L272 AbstractInterpreter]: Visited 107 different actions 208 times. Merged at 4 different actions 4 times. Never widened. Performed 406 root evaluator evaluations with a maximum evaluation depth of 17. Performed 406 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 17:03:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:03:42,213 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:05:11,641 INFO L227 lantSequenceWeakener]: Weakened 128 states. On average, predicates are now at 70.98% of their original sizes. [2019-09-09 17:05:11,641 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:05:11,712 INFO L420 sIntCurrentIteration]: We unified 130 AI predicates to 130 [2019-09-09 17:05:11,712 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:05:11,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:05:11,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2019-09-09 17:05:11,714 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:05:11,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 17:05:11,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 17:05:11,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 17:05:11,715 INFO L87 Difference]: Start difference. First operand 7045 states and 10390 transitions. Second operand 10 states. [2019-09-09 17:09:01,030 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.