java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:41:50,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:41:50,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:41:50,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:41:50,632 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 19:41:50,657 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:41:50,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:41:50,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:41:50,658 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:41:50,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:41:50,659 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:41:50,659 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:41:50,660 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:41:50,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:41:50,661 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:41:50,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:41:50,662 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:41:50,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:41:50,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:41:50,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:41:50,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:41:50,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:41:50,663 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:41:50,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:41:50,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:41:50,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:41:50,665 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:41:50,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:41:50,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:41:50,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:41:50,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:41:50,666 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:41:50,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:41:50,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:41:50,666 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:41:50,695 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:41:50,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:41:50,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:41:50,726 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:41:50,726 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:41:50,727 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label56.c [2019-09-09 19:41:50,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c790ebe18/2326763800e04deb9632afb3b0b87816/FLAGbb316d510 [2019-09-09 19:41:51,535 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:41:51,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label56.c [2019-09-09 19:41:51,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c790ebe18/2326763800e04deb9632afb3b0b87816/FLAGbb316d510 [2019-09-09 19:41:51,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c790ebe18/2326763800e04deb9632afb3b0b87816 [2019-09-09 19:41:51,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:41:51,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:41:51,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:41:51,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:41:51,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:41:51,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:41:51" (1/1) ... [2019-09-09 19:41:51,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74acbc84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:51, skipping insertion in model container [2019-09-09 19:41:51,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:41:51" (1/1) ... [2019-09-09 19:41:51,763 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:41:51,864 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:41:52,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:41:52,861 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:41:53,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:41:53,319 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:41:53,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53 WrapperNode [2019-09-09 19:41:53,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:41:53,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:41:53,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:41:53,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:41:53,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (1/1) ... [2019-09-09 19:41:53,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (1/1) ... [2019-09-09 19:41:53,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (1/1) ... [2019-09-09 19:41:53,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (1/1) ... [2019-09-09 19:41:53,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (1/1) ... [2019-09-09 19:41:53,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (1/1) ... [2019-09-09 19:41:53,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (1/1) ... [2019-09-09 19:41:53,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:41:53,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:41:53,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:41:53,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:41:53,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (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 19:41:53,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:41:53,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:41:53,647 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:41:53,647 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:41:53,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:41:53,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:41:53,650 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:41:53,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:41:53,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:41:53,651 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:41:53,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:41:53,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:41:53,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:41:56,762 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:41:56,763 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:41:56,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:41:56 BoogieIcfgContainer [2019-09-09 19:41:56,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:41:56,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:41:56,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:41:56,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:41:56,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:41:51" (1/3) ... [2019-09-09 19:41:56,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5933e03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:41:56, skipping insertion in model container [2019-09-09 19:41:56,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:53" (2/3) ... [2019-09-09 19:41:56,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5933e03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:41:56, skipping insertion in model container [2019-09-09 19:41:56,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:41:56" (3/3) ... [2019-09-09 19:41:56,774 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label56.c [2019-09-09 19:41:56,784 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:41:56,793 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:41:56,811 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:41:56,842 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:41:56,842 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:41:56,842 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:41:56,843 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:41:56,843 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:41:56,844 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:41:56,844 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:41:56,844 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:41:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:41:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-09 19:41:56,906 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:41:56,908 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] [2019-09-09 19:41:56,910 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:41:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:41:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2075233339, now seen corresponding path program 1 times [2019-09-09 19:41:56,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:41:56,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:56,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:41:56,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:56,980 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:41:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:41:57,335 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 19:41:57,337 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:41:57,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:41:57,337 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:41:57,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:41:57,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:41:57,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:41:57,361 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:42:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:42:02,278 INFO L93 Difference]: Finished difference Result 1066 states and 1447 transitions. [2019-09-09 19:42:02,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:42:02,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-09-09 19:42:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:42:02,321 INFO L225 Difference]: With dead ends: 1066 [2019-09-09 19:42:02,321 INFO L226 Difference]: Without dead ends: 993 [2019-09-09 19:42:02,323 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:42:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-09-09 19:42:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-09-09 19:42:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 19:42:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-09-09 19:42:02,436 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 39 [2019-09-09 19:42:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:42:02,436 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-09-09 19:42:02,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:42:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-09-09 19:42:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-09 19:42:02,442 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:42:02,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:02,443 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:42:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:42:02,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1497947422, now seen corresponding path program 1 times [2019-09-09 19:42:02,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:42:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:42:02,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:42:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:42:02,445 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:42:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:42:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:42:02,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:42:02,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:42:02,649 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:42:02,650 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:42:02,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:42:02,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:42:02,654 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 4 states. [2019-09-09 19:42:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:42:06,788 INFO L93 Difference]: Finished difference Result 1926 states and 2567 transitions. [2019-09-09 19:42:06,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:42:06,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-09-09 19:42:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:42:06,805 INFO L225 Difference]: With dead ends: 1926 [2019-09-09 19:42:06,805 INFO L226 Difference]: Without dead ends: 1926 [2019-09-09 19:42:06,806 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:42:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2019-09-09 19:42:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1924. [2019-09-09 19:42:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1924 states. [2019-09-09 19:42:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2563 transitions. [2019-09-09 19:42:06,874 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2563 transitions. Word has length 108 [2019-09-09 19:42:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:42:06,876 INFO L475 AbstractCegarLoop]: Abstraction has 1924 states and 2563 transitions. [2019-09-09 19:42:06,877 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:42:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2563 transitions. [2019-09-09 19:42:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-09-09 19:42:06,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:42:06,888 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 19:42:06,889 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:42:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:42:06,890 INFO L82 PathProgramCache]: Analyzing trace with hash -311064930, now seen corresponding path program 1 times [2019-09-09 19:42:06,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:42:06,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:42:06,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:42:06,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:42:06,892 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:42:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:42:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 67 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:42:07,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:42:07,249 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:42:07,253 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 214 with the following transitions: [2019-09-09 19:42:07,256 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [613], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:42:07,302 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:42:07,303 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:42:10,601 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:42:11,946 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:42:11,949 INFO L272 AbstractInterpreter]: Visited 103 different actions 201 times. Merged at 4 different actions 5 times. Never widened. Performed 453 root evaluator evaluations with a maximum evaluation depth of 13. Performed 453 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:42:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:42:11,954 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:42:13,377 INFO L227 lantSequenceWeakener]: Weakened 210 states. On average, predicates are now at 77.72% of their original sizes. [2019-09-09 19:42:13,378 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:42:13,463 INFO L420 sIntCurrentIteration]: We unified 212 AI predicates to 212 [2019-09-09 19:42:13,464 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:42:13,464 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:42:13,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 19:42:13,465 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:42:13,466 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:42:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:42:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:42:13,467 INFO L87 Difference]: Start difference. First operand 1924 states and 2563 transitions. Second operand 11 states. [2019-09-09 19:46:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:46:49,026 INFO L93 Difference]: Finished difference Result 2576 states and 3236 transitions. [2019-09-09 19:46:49,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 19:46:49,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 213 [2019-09-09 19:46:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:46:49,038 INFO L225 Difference]: With dead ends: 2576 [2019-09-09 19:46:49,038 INFO L226 Difference]: Without dead ends: 2576 [2019-09-09 19:46:49,039 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 19:46:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2019-09-09 19:46:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2231. [2019-09-09 19:46:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2231 states. [2019-09-09 19:46:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 2878 transitions. [2019-09-09 19:46:49,087 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 2878 transitions. Word has length 213 [2019-09-09 19:46:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:46:49,088 INFO L475 AbstractCegarLoop]: Abstraction has 2231 states and 2878 transitions. [2019-09-09 19:46:49,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 19:46:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 2878 transitions. [2019-09-09 19:46:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-09-09 19:46:49,094 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:46:49,094 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:46:49,095 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:46:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:46:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash 994726441, now seen corresponding path program 1 times [2019-09-09 19:46:49,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:46:49,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:46:49,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:46:49,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:46:49,097 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:46:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:46:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 67 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:46:49,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:46:49,459 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:46:49,459 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 299 with the following transitions: [2019-09-09 19:46:49,462 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [613], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1115], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:46:49,483 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:46:49,484 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:46:56,386 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:46:59,372 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:46:59,372 INFO L272 AbstractInterpreter]: Visited 188 different actions 371 times. Merged at 4 different actions 5 times. Never widened. Performed 696 root evaluator evaluations with a maximum evaluation depth of 14. Performed 696 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:46:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:46:59,373 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:47:02,554 INFO L227 lantSequenceWeakener]: Weakened 295 states. On average, predicates are now at 77.59% of their original sizes. [2019-09-09 19:47:02,554 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:47:02,666 INFO L420 sIntCurrentIteration]: We unified 297 AI predicates to 297 [2019-09-09 19:47:02,666 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:47:02,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:47:02,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 19:47:02,667 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:47:02,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:47:02,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:47:02,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:47:02,668 INFO L87 Difference]: Start difference. First operand 2231 states and 2878 transitions. Second operand 12 states.