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/Problem16_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:39:36,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:39:36,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:39:36,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:39:36,738 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 20:39:36,768 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:39:36,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:39:36,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:39:36,769 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:39:36,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:39:36,771 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:39:36,771 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:39:36,772 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:39:36,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:39:36,772 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:39:36,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:39:36,773 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:39:36,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:39:36,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:39:36,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:39:36,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:39:36,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:39:36,774 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:39:36,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:39:36,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:39:36,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:39:36,775 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:39:36,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:39:36,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:39:36,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:39:36,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:39:36,777 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:39:36,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:39:36,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:39:36,778 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:39:36,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:39:36,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:39:36,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:39:36,852 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:39:36,852 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:39:36,853 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label51.c [2019-09-09 20:39:36,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a03af635/539accaddbc94b5a8ce33400c0e5db28/FLAG649a90583 [2019-09-09 20:39:37,501 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:39:37,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label51.c [2019-09-09 20:39:37,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a03af635/539accaddbc94b5a8ce33400c0e5db28/FLAG649a90583 [2019-09-09 20:39:37,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a03af635/539accaddbc94b5a8ce33400c0e5db28 [2019-09-09 20:39:37,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:39:37,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:39:37,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:39:37,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:39:37,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:39:37,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:39:37" (1/1) ... [2019-09-09 20:39:37,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@720701ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:37, skipping insertion in model container [2019-09-09 20:39:37,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:39:37" (1/1) ... [2019-09-09 20:39:37,763 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:39:37,847 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:39:38,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:39:38,666 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:39:39,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:39:39,026 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:39:39,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39 WrapperNode [2019-09-09 20:39:39,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:39:39,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:39:39,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:39:39,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:39:39,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (1/1) ... [2019-09-09 20:39:39,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (1/1) ... [2019-09-09 20:39:39,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (1/1) ... [2019-09-09 20:39:39,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (1/1) ... [2019-09-09 20:39:39,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (1/1) ... [2019-09-09 20:39:39,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (1/1) ... [2019-09-09 20:39:39,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (1/1) ... [2019-09-09 20:39:39,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:39:39,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:39:39,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:39:39,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:39:39,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (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 20:39:39,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:39:39,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:39:39,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:39:39,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:39:39,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:39:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:39:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:39:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:39:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:39:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:39:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:39:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:39:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:39:41,735 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:39:41,736 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:39:41,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:39:41 BoogieIcfgContainer [2019-09-09 20:39:41,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:39:41,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:39:41,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:39:41,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:39:41,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:39:37" (1/3) ... [2019-09-09 20:39:41,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd75d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:39:41, skipping insertion in model container [2019-09-09 20:39:41,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:39" (2/3) ... [2019-09-09 20:39:41,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd75d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:39:41, skipping insertion in model container [2019-09-09 20:39:41,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:39:41" (3/3) ... [2019-09-09 20:39:41,749 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label51.c [2019-09-09 20:39:41,760 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:39:41,771 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:39:41,789 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:39:41,822 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:39:41,822 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:39:41,822 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:39:41,822 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:39:41,823 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:39:41,823 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:39:41,823 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:39:41,823 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:39:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:39:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-09 20:39:41,870 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:39:41,871 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] [2019-09-09 20:39:41,873 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:39:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:39:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash 848957365, now seen corresponding path program 1 times [2019-09-09 20:39:41,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:39:41,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:41,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:39:41,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:41,934 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:39:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:39:42,113 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 20:39:42,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:39:42,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 20:39:42,116 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:39:42,121 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 20:39:42,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 20:39:42,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:39:42,141 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-09-09 20:39:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:39:45,027 INFO L93 Difference]: Finished difference Result 750 states and 1301 transitions. [2019-09-09 20:39:45,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 20:39:45,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-09-09 20:39:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:39:45,055 INFO L225 Difference]: With dead ends: 750 [2019-09-09 20:39:45,056 INFO L226 Difference]: Without dead ends: 682 [2019-09-09 20:39:45,057 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:39:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-09-09 20:39:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-09-09 20:39:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:39:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-09-09 20:39:45,174 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 20 [2019-09-09 20:39:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:39:45,175 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-09-09 20:39:45,175 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 20:39:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-09-09 20:39:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-09 20:39:45,179 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:39:45,180 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:39:45,180 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:39:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:39:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash -998281719, now seen corresponding path program 1 times [2019-09-09 20:39:45,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:39:45,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:45,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:39:45,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:45,184 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:39:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:39:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:39:45,421 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:39:45,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 20:39:45,422 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:39:45,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 20:39:45,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 20:39:45,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 20:39:45,424 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-09-09 20:39:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:39:48,481 INFO L93 Difference]: Finished difference Result 1390 states and 2310 transitions. [2019-09-09 20:39:48,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:39:48,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2019-09-09 20:39:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:39:48,492 INFO L225 Difference]: With dead ends: 1390 [2019-09-09 20:39:48,493 INFO L226 Difference]: Without dead ends: 1390 [2019-09-09 20:39:48,493 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 20:39:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-09-09 20:39:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-09-09 20:39:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-09-09 20:39:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-09-09 20:39:48,546 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 89 [2019-09-09 20:39:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:39:48,547 INFO L475 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-09-09 20:39:48,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 20:39:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-09-09 20:39:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 20:39:48,556 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:39:48,556 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 20:39:48,556 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:39:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:39:48,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1910769444, now seen corresponding path program 1 times [2019-09-09 20:39:48,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:39:48,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:48,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:39:48,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:48,560 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:39:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:39:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:39:48,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:39:48,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:39:48,753 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:39:48,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:39:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:39:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:39:48,754 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-09-09 20:39:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:39:54,470 INFO L93 Difference]: Finished difference Result 2106 states and 3333 transitions. [2019-09-09 20:39:54,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:39:54,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-09-09 20:39:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:39:54,484 INFO L225 Difference]: With dead ends: 2106 [2019-09-09 20:39:54,484 INFO L226 Difference]: Without dead ends: 2106 [2019-09-09 20:39:54,485 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 20:39:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-09-09 20:39:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-09-09 20:39:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-09-09 20:39:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-09-09 20:39:54,546 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 118 [2019-09-09 20:39:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:39:54,547 INFO L475 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-09-09 20:39:54,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:39:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-09-09 20:39:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-09 20:39:54,550 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:39:54,550 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:39:54,550 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:39:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:39:54,551 INFO L82 PathProgramCache]: Analyzing trace with hash -734488488, now seen corresponding path program 1 times [2019-09-09 20:39:54,551 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:39:54,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:54,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:39:54,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:54,552 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:39:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:39:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:39:54,691 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:39:54,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:39:54,691 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:39:54,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:39:54,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:39:54,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:39:54,694 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-09-09 20:39:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:39:57,416 INFO L93 Difference]: Finished difference Result 3166 states and 4200 transitions. [2019-09-09 20:39:57,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:39:57,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-09-09 20:39:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:39:57,443 INFO L225 Difference]: With dead ends: 3166 [2019-09-09 20:39:57,443 INFO L226 Difference]: Without dead ends: 3166 [2019-09-09 20:39:57,444 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 20:39:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-09-09 20:39:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-09-09 20:39:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-09-09 20:39:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-09-09 20:39:57,577 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 136 [2019-09-09 20:39:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:39:57,579 INFO L475 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-09-09 20:39:57,579 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:39:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-09-09 20:39:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-09-09 20:39:57,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:39:57,592 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 20:39:57,592 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:39:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:39:57,593 INFO L82 PathProgramCache]: Analyzing trace with hash 292028781, now seen corresponding path program 1 times [2019-09-09 20:39:57,593 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:39:57,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:57,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:39:57,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:57,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:39:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:39:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 20:39:57,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:39:57,993 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:39:57,995 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2019-09-09 20:39:57,998 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [247], [249], [252], [260], [268], [276], [284], [292], [300], [308], [316], [324], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:39:58,099 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:39:58,100 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:40:07,551 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:40:07,553 INFO L272 AbstractInterpreter]: Visited 134 different actions 134 times. Never merged. Never widened. Performed 305 root evaluator evaluations with a maximum evaluation depth of 14. Performed 305 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 20:40:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:40:07,560 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:40:13,299 INFO L227 lantSequenceWeakener]: Weakened 199 states. On average, predicates are now at 77.46% of their original sizes. [2019-09-09 20:40:13,299 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:40:13,409 INFO L420 sIntCurrentIteration]: We unified 217 AI predicates to 217 [2019-09-09 20:40:13,410 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:40:13,414 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:40:13,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2019-09-09 20:40:13,415 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:40:13,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 20:40:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 20:40:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-09-09 20:40:13,416 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 12 states. [2019-09-09 20:40:33,701 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.