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_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:19:55,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:19:55,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:19:55,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:19:55,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:19:55,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:19:55,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:19:55,416 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 19:19:55,446 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:19:55,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:19:55,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:19:55,446 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:19:55,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:19:55,447 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:19:55,448 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:19:55,448 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:19:55,448 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:19:55,449 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:19:55,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:19:55,451 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:19:55,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:19:55,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:19:55,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:19:55,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:19:55,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:19:55,452 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:19:55,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:19:55,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:19:55,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:19:55,453 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:19:55,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:19:55,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:19:55,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:19:55,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:19:55,454 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:19:55,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:19:55,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:19:55,455 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:19:55,504 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:19:55,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:19:55,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:19:55,519 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:19:55,520 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:19:55,520 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-09-09 19:19:55,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cccff4b/b76caf75659546b098ddbf8563787c70/FLAGadb92d1ad [2019-09-09 19:19:56,192 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:19:56,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-09-09 19:19:56,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cccff4b/b76caf75659546b098ddbf8563787c70/FLAGadb92d1ad [2019-09-09 19:19:56,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12cccff4b/b76caf75659546b098ddbf8563787c70 [2019-09-09 19:19:56,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:19:56,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:19:56,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:19:56,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:19:56,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:19:56,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:19:56" (1/1) ... [2019-09-09 19:19:56,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771b240b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:56, skipping insertion in model container [2019-09-09 19:19:56,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:19:56" (1/1) ... [2019-09-09 19:19:56,430 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:19:56,515 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:19:57,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:19:57,399 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:19:57,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:19:57,820 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:19:57,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57 WrapperNode [2019-09-09 19:19:57,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:19:57,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:19:57,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:19:57,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:19:57,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (1/1) ... [2019-09-09 19:19:57,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (1/1) ... [2019-09-09 19:19:57,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (1/1) ... [2019-09-09 19:19:57,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (1/1) ... [2019-09-09 19:19:57,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (1/1) ... [2019-09-09 19:19:57,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (1/1) ... [2019-09-09 19:19:57,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (1/1) ... [2019-09-09 19:19:58,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:19:58,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:19:58,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:19:58,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:19:58,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (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 19:19:58,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:19:58,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:19:58,087 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:19:58,087 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:19:58,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:19:58,088 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:19:58,088 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:19:58,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:19:58,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:19:58,089 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:19:58,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:19:58,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:19:58,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:20:01,894 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:20:01,900 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:20:01,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:20:01 BoogieIcfgContainer [2019-09-09 19:20:01,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:20:01,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:20:01,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:20:01,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:20:01,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:19:56" (1/3) ... [2019-09-09 19:20:01,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb045f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:20:01, skipping insertion in model container [2019-09-09 19:20:01,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:19:57" (2/3) ... [2019-09-09 19:20:01,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb045f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:20:01, skipping insertion in model container [2019-09-09 19:20:01,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:20:01" (3/3) ... [2019-09-09 19:20:01,914 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2019-09-09 19:20:01,926 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:20:01,940 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:20:01,959 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:20:01,993 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:20:01,993 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:20:01,993 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:20:01,994 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:20:01,994 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:20:01,994 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:20:01,994 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:20:01,995 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:20:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:20:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-09 19:20:02,066 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:20:02,068 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:20:02,071 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:20:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:20:02,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1512840592, now seen corresponding path program 1 times [2019-09-09 19:20:02,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:20:02,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:20:02,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:20:02,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:20:02,153 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:20:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:20:02,555 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 19:20:02,558 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:20:02,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:20:02,558 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:20:02,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:20:02,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:20:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:20:02,582 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:20:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:20:06,968 INFO L93 Difference]: Finished difference Result 1123 states and 1943 transitions. [2019-09-09 19:20:06,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:20:06,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-09-09 19:20:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:20:07,000 INFO L225 Difference]: With dead ends: 1123 [2019-09-09 19:20:07,000 INFO L226 Difference]: Without dead ends: 1036 [2019-09-09 19:20:07,002 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 19:20:07,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-09-09 19:20:07,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-09-09 19:20:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-09-09 19:20:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-09-09 19:20:07,114 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 42 [2019-09-09 19:20:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:20:07,115 INFO L475 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-09-09 19:20:07,115 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:20:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-09-09 19:20:07,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-09 19:20:07,120 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:20:07,121 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:07,121 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:20:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:20:07,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1983802676, now seen corresponding path program 1 times [2019-09-09 19:20:07,122 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:20:07,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:20:07,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:20:07,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:20:07,124 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:20:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:20:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:20:07,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:20:07,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:20:07,276 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:20:07,281 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:20:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:20:07,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:20:07,282 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-09-09 19:20:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:20:11,332 INFO L93 Difference]: Finished difference Result 1940 states and 2950 transitions. [2019-09-09 19:20:11,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:20:11,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2019-09-09 19:20:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:20:11,351 INFO L225 Difference]: With dead ends: 1940 [2019-09-09 19:20:11,351 INFO L226 Difference]: Without dead ends: 1940 [2019-09-09 19:20:11,352 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 19:20:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2019-09-09 19:20:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1937. [2019-09-09 19:20:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2019-09-09 19:20:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2945 transitions. [2019-09-09 19:20:11,447 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2945 transitions. Word has length 111 [2019-09-09 19:20:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:20:11,449 INFO L475 AbstractCegarLoop]: Abstraction has 1937 states and 2945 transitions. [2019-09-09 19:20:11,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:20:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2945 transitions. [2019-09-09 19:20:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-09 19:20:11,459 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:20:11,460 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:11,460 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:20:11,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:20:11,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1476577176, now seen corresponding path program 1 times [2019-09-09 19:20:11,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:20:11,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:20:11,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:20:11,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:20:11,464 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:20:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:20:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:20:11,622 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:20:11,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:20:11,622 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:20:11,623 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:20:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:20:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:20:11,624 INFO L87 Difference]: Start difference. First operand 1937 states and 2945 transitions. Second operand 5 states. [2019-09-09 19:20:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:20:15,363 INFO L93 Difference]: Finished difference Result 3871 states and 5248 transitions. [2019-09-09 19:20:15,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:20:15,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-09-09 19:20:15,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:20:15,389 INFO L225 Difference]: With dead ends: 3871 [2019-09-09 19:20:15,389 INFO L226 Difference]: Without dead ends: 3871 [2019-09-09 19:20:15,393 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 19:20:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2019-09-09 19:20:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3833. [2019-09-09 19:20:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3833 states. [2019-09-09 19:20:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 5156 transitions. [2019-09-09 19:20:15,526 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 5156 transitions. Word has length 128 [2019-09-09 19:20:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:20:15,528 INFO L475 AbstractCegarLoop]: Abstraction has 3833 states and 5156 transitions. [2019-09-09 19:20:15,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:20:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 5156 transitions. [2019-09-09 19:20:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-09-09 19:20:15,541 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:20:15,541 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:20:15,542 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:20:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:20:15,542 INFO L82 PathProgramCache]: Analyzing trace with hash -839432913, now seen corresponding path program 1 times [2019-09-09 19:20:15,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:20:15,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:20:15,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:20:15,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:20:15,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:20:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:20:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-09 19:20:16,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:20:16,080 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:20:16,081 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 409 with the following transitions: [2019-09-09 19:20:16,084 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], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [648], [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], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1209], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:20:16,141 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:20:16,142 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:20:27,148 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:20:27,150 INFO L272 AbstractInterpreter]: Visited 206 different actions 206 times. Never merged. Never widened. Performed 451 root evaluator evaluations with a maximum evaluation depth of 14. Performed 451 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:20:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:20:27,155 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:20:35,717 INFO L227 lantSequenceWeakener]: Weakened 384 states. On average, predicates are now at 77.63% of their original sizes. [2019-09-09 19:20:35,717 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:20:35,811 INFO L420 sIntCurrentIteration]: We unified 407 AI predicates to 407 [2019-09-09 19:20:35,812 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:20:35,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:20:35,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 19:20:35,813 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:20:35,814 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:20:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:20:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:20:35,815 INFO L87 Difference]: Start difference. First operand 3833 states and 5156 transitions. Second operand 11 states. [2019-09-09 19:20:45,120 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.