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/Problem17_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:48:50,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:48:50,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:48:50,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:48:50,353 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 21:48:50,369 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:48:50,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:48:50,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:48:50,370 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:48:50,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:48:50,371 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:48:50,371 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:48:50,371 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:48:50,371 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:48:50,372 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:48:50,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:48:50,372 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:48:50,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:48:50,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:48:50,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:48:50,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:48:50,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:48:50,374 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:48:50,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:48:50,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:48:50,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:48:50,374 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:48:50,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:48:50,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:48:50,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:48:50,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:48:50,375 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:48:50,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:48:50,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:48:50,376 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:48:50,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:48:50,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:48:50,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:48:50,426 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:48:50,428 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:48:50,429 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label59.c [2019-09-09 21:48:50,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17cae8cb4/b3638b34d5b34281b16a4114435ffa43/FLAG647ad6a98 [2019-09-09 21:48:51,139 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:48:51,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label59.c [2019-09-09 21:48:51,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17cae8cb4/b3638b34d5b34281b16a4114435ffa43/FLAG647ad6a98 [2019-09-09 21:48:51,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17cae8cb4/b3638b34d5b34281b16a4114435ffa43 [2019-09-09 21:48:51,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:48:51,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:48:51,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:48:51,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:48:51,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:48:51,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:48:51" (1/1) ... [2019-09-09 21:48:51,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b28937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:51, skipping insertion in model container [2019-09-09 21:48:51,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:48:51" (1/1) ... [2019-09-09 21:48:51,273 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:48:51,368 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:48:52,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:48:52,607 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:48:53,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:48:53,041 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:48:53,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53 WrapperNode [2019-09-09 21:48:53,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:48:53,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:48:53,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:48:53,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:48:53,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (1/1) ... [2019-09-09 21:48:53,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (1/1) ... [2019-09-09 21:48:53,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (1/1) ... [2019-09-09 21:48:53,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (1/1) ... [2019-09-09 21:48:53,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (1/1) ... [2019-09-09 21:48:53,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (1/1) ... [2019-09-09 21:48:53,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (1/1) ... [2019-09-09 21:48:53,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:48:53,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:48:53,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:48:53,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:48:53,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (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 21:48:53,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:48:53,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:48:53,390 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:48:53,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:48:53,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:48:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:48:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:48:53,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:48:53,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:48:53,392 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:48:53,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:48:53,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:48:53,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:48:57,599 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:48:57,600 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:48:57,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:48:57 BoogieIcfgContainer [2019-09-09 21:48:57,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:48:57,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:48:57,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:48:57,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:48:57,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:48:51" (1/3) ... [2019-09-09 21:48:57,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff614d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:48:57, skipping insertion in model container [2019-09-09 21:48:57,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:48:53" (2/3) ... [2019-09-09 21:48:57,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff614d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:48:57, skipping insertion in model container [2019-09-09 21:48:57,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:48:57" (3/3) ... [2019-09-09 21:48:57,621 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label59.c [2019-09-09 21:48:57,635 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:48:57,647 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:48:57,666 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:48:57,694 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:48:57,695 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:48:57,695 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:48:57,695 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:48:57,695 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:48:57,695 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:48:57,695 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:48:57,696 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:48:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:48:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-09 21:48:57,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:48:57,758 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] [2019-09-09 21:48:57,760 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:48:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:48:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1981769895, now seen corresponding path program 1 times [2019-09-09 21:48:57,769 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:48:57,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:48:57,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:48:57,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:48:57,818 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:48:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:48:58,111 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 21:48:58,114 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:48:58,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:48:58,114 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:48:58,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:48:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:48:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:48:58,141 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:49:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:49:05,665 INFO L93 Difference]: Finished difference Result 1563 states and 2716 transitions. [2019-09-09 21:49:05,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:49:05,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-09-09 21:49:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:49:05,698 INFO L225 Difference]: With dead ends: 1563 [2019-09-09 21:49:05,698 INFO L226 Difference]: Without dead ends: 1476 [2019-09-09 21:49:05,700 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 21:49:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2019-09-09 21:49:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 990. [2019-09-09 21:49:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2019-09-09 21:49:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1715 transitions. [2019-09-09 21:49:05,819 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1715 transitions. Word has length 38 [2019-09-09 21:49:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:49:05,820 INFO L475 AbstractCegarLoop]: Abstraction has 990 states and 1715 transitions. [2019-09-09 21:49:05,820 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:49:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1715 transitions. [2019-09-09 21:49:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-09 21:49:05,827 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:49:05,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:49:05,828 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:49:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:49:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1220667172, now seen corresponding path program 1 times [2019-09-09 21:49:05,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:49:05,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:49:05,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:49:05,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:49:05,832 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:49:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:49:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:49:06,068 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:49:06,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 21:49:06,068 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:49:06,073 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 21:49:06,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 21:49:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 21:49:06,074 INFO L87 Difference]: Start difference. First operand 990 states and 1715 transitions. Second operand 5 states. [2019-09-09 21:49:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:49:10,874 INFO L93 Difference]: Finished difference Result 1919 states and 3013 transitions. [2019-09-09 21:49:10,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:49:10,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-09-09 21:49:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:49:10,895 INFO L225 Difference]: With dead ends: 1919 [2019-09-09 21:49:10,895 INFO L226 Difference]: Without dead ends: 1919 [2019-09-09 21:49:10,896 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 21:49:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2019-09-09 21:49:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1895. [2019-09-09 21:49:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2019-09-09 21:49:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2965 transitions. [2019-09-09 21:49:10,992 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2965 transitions. Word has length 109 [2019-09-09 21:49:10,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:49:10,994 INFO L475 AbstractCegarLoop]: Abstraction has 1895 states and 2965 transitions. [2019-09-09 21:49:10,994 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 21:49:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2965 transitions. [2019-09-09 21:49:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-09 21:49:11,005 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:49:11,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:49:11,006 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:49:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:49:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2122787760, now seen corresponding path program 1 times [2019-09-09 21:49:11,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:49:11,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:49:11,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:49:11,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:49:11,010 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:49:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:49:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:49:11,263 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:49:11,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:49:11,263 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:49:11,263 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:49:11,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:49:11,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:49:11,264 INFO L87 Difference]: Start difference. First operand 1895 states and 2965 transitions. Second operand 4 states. [2019-09-09 21:49:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:49:18,799 INFO L93 Difference]: Finished difference Result 5440 states and 7941 transitions. [2019-09-09 21:49:18,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:49:18,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-09-09 21:49:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:49:18,836 INFO L225 Difference]: With dead ends: 5440 [2019-09-09 21:49:18,837 INFO L226 Difference]: Without dead ends: 5440 [2019-09-09 21:49:18,841 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 21:49:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2019-09-09 21:49:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5434. [2019-09-09 21:49:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5434 states. [2019-09-09 21:49:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 7929 transitions. [2019-09-09 21:49:19,028 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 7929 transitions. Word has length 112 [2019-09-09 21:49:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:49:19,030 INFO L475 AbstractCegarLoop]: Abstraction has 5434 states and 7929 transitions. [2019-09-09 21:49:19,030 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:49:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 7929 transitions. [2019-09-09 21:49:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-09 21:49:19,049 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:49:19,049 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, 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] [2019-09-09 21:49:19,049 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:49:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:49:19,050 INFO L82 PathProgramCache]: Analyzing trace with hash 759794351, now seen corresponding path program 1 times [2019-09-09 21:49:19,050 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:49:19,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:49:19,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:49:19,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:49:19,051 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:49:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:49:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 21:49:19,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:49:19,386 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:49:19,387 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 210 with the following transitions: [2019-09-09 21:49:19,390 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [922], [924], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1348], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:49:19,464 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:49:19,464 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:49:26,359 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:49:26,361 INFO L272 AbstractInterpreter]: Visited 105 different actions 105 times. Never merged. Never widened. Performed 241 root evaluator evaluations with a maximum evaluation depth of 15. Performed 241 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 21:49:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:49:26,366 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:49:31,693 INFO L227 lantSequenceWeakener]: Weakened 190 states. On average, predicates are now at 75.57% of their original sizes. [2019-09-09 21:49:31,694 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:49:31,792 INFO L420 sIntCurrentIteration]: We unified 208 AI predicates to 208 [2019-09-09 21:49:31,792 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:49:31,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:49:31,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 21:49:31,793 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:49:31,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:49:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:49:31,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:49:31,795 INFO L87 Difference]: Start difference. First operand 5434 states and 7929 transitions. Second operand 11 states. [2019-09-09 21:49:43,427 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.