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/Problem14_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:36:15,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:36:15,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:36:15,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:36:15,359 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 18:36:15,373 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:36:15,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:36:15,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:36:15,374 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:36:15,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:36:15,375 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:36:15,375 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:36:15,375 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:36:15,376 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:36:15,376 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:36:15,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:36:15,377 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:36:15,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:36:15,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:36:15,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:36:15,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:36:15,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:36:15,378 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:36:15,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:36:15,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:36:15,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:36:15,378 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:36:15,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:36:15,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:36:15,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:36:15,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:36:15,379 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:36:15,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:36:15,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:36:15,380 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:36:15,419 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:36:15,432 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:36:15,435 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:36:15,437 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:36:15,437 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:36:15,438 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52.c [2019-09-09 18:36:15,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27055ab6d/1dcfd1f196654e609963b86f5f33ceed/FLAG0df7ce0fd [2019-09-09 18:36:16,179 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:36:16,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52.c [2019-09-09 18:36:16,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27055ab6d/1dcfd1f196654e609963b86f5f33ceed/FLAG0df7ce0fd [2019-09-09 18:36:16,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27055ab6d/1dcfd1f196654e609963b86f5f33ceed [2019-09-09 18:36:16,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:36:16,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:36:16,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:36:16,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:36:16,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:36:16,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:36:16" (1/1) ... [2019-09-09 18:36:16,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba76764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:16, skipping insertion in model container [2019-09-09 18:36:16,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:36:16" (1/1) ... [2019-09-09 18:36:16,415 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:36:16,481 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:36:17,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:36:17,052 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:36:17,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:36:17,365 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:36:17,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17 WrapperNode [2019-09-09 18:36:17,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:36:17,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:36:17,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:36:17,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:36:17,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (1/1) ... [2019-09-09 18:36:17,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (1/1) ... [2019-09-09 18:36:17,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (1/1) ... [2019-09-09 18:36:17,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (1/1) ... [2019-09-09 18:36:17,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (1/1) ... [2019-09-09 18:36:17,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (1/1) ... [2019-09-09 18:36:17,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (1/1) ... [2019-09-09 18:36:17,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:36:17,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:36:17,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:36:17,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:36:17,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (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 18:36:17,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:36:17,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:36:17,644 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:36:17,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:36:17,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:36:17,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:36:17,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:36:17,645 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:36:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:36:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:36:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:36:19,313 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:36:19,314 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:36:19,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:36:19 BoogieIcfgContainer [2019-09-09 18:36:19,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:36:19,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:36:19,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:36:19,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:36:19,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:36:16" (1/3) ... [2019-09-09 18:36:19,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a81be52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:36:19, skipping insertion in model container [2019-09-09 18:36:19,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:36:17" (2/3) ... [2019-09-09 18:36:19,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a81be52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:36:19, skipping insertion in model container [2019-09-09 18:36:19,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:36:19" (3/3) ... [2019-09-09 18:36:19,324 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label52.c [2019-09-09 18:36:19,334 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:36:19,343 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:36:19,361 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:36:19,389 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:36:19,390 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:36:19,390 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:36:19,390 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:36:19,390 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:36:19,390 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:36:19,391 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:36:19,391 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:36:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:36:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 18:36:19,426 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:36:19,427 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] [2019-09-09 18:36:19,429 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:36:19,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:36:19,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2120821501, now seen corresponding path program 1 times [2019-09-09 18:36:19,438 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:36:19,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:19,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:36:19,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:19,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:36:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:36:19,678 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 18:36:19,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:36:19,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:36:19,681 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:36:19,687 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:36:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:36:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:36:19,703 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-09-09 18:36:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:36:21,159 INFO L93 Difference]: Finished difference Result 440 states and 711 transitions. [2019-09-09 18:36:21,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:36:21,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-09-09 18:36:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:36:21,195 INFO L225 Difference]: With dead ends: 440 [2019-09-09 18:36:21,195 INFO L226 Difference]: Without dead ends: 372 [2019-09-09 18:36:21,198 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 18:36:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-09-09 18:36:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-09-09 18:36:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:36:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-09-09 18:36:21,281 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 28 [2019-09-09 18:36:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:36:21,282 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-09-09 18:36:21,282 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:36:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-09-09 18:36:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-09 18:36:21,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:36:21,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:21,293 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:36:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:36:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1199804154, now seen corresponding path program 1 times [2019-09-09 18:36:21,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:36:21,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:21,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:36:21,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:21,299 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:36:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:36:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:36:21,603 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:36:21,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:36:21,604 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:36:21,606 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:36:21,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:36:21,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:36:21,607 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-09-09 18:36:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:36:23,000 INFO L93 Difference]: Finished difference Result 570 states and 828 transitions. [2019-09-09 18:36:23,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:36:23,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-09-09 18:36:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:36:23,005 INFO L225 Difference]: With dead ends: 570 [2019-09-09 18:36:23,005 INFO L226 Difference]: Without dead ends: 570 [2019-09-09 18:36:23,006 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 18:36:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-09-09 18:36:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-09-09 18:36:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-09-09 18:36:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-09-09 18:36:23,040 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 114 [2019-09-09 18:36:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:36:23,042 INFO L475 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-09-09 18:36:23,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:36:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-09-09 18:36:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 18:36:23,045 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:36:23,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:23,046 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:36:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:36:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash 217144121, now seen corresponding path program 1 times [2019-09-09 18:36:23,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:36:23,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:23,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:36:23,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:23,051 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:36:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:36:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:36:23,235 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:36:23,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:36:23,235 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:36:23,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:36:23,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:36:23,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:36:23,238 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-09-09 18:36:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:36:24,803 INFO L93 Difference]: Finished difference Result 1664 states and 2287 transitions. [2019-09-09 18:36:24,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:36:24,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-09-09 18:36:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:36:24,814 INFO L225 Difference]: With dead ends: 1664 [2019-09-09 18:36:24,815 INFO L226 Difference]: Without dead ends: 1664 [2019-09-09 18:36:24,815 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 18:36:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-09-09 18:36:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664. [2019-09-09 18:36:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2019-09-09 18:36:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2287 transitions. [2019-09-09 18:36:24,888 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2287 transitions. Word has length 123 [2019-09-09 18:36:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:36:24,898 INFO L475 AbstractCegarLoop]: Abstraction has 1664 states and 2287 transitions. [2019-09-09 18:36:24,898 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:36:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2287 transitions. [2019-09-09 18:36:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-09 18:36:24,918 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:36:24,918 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, 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, 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] [2019-09-09 18:36:24,918 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:36:24,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:36:24,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1603017994, now seen corresponding path program 1 times [2019-09-09 18:36:24,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:36:24,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:24,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:36:24,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:24,921 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:36:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:36:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-09-09 18:36:25,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:36:25,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:36:25,236 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:36:25,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:36:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:36:25,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:36:25,238 INFO L87 Difference]: Start difference. First operand 1664 states and 2287 transitions. Second operand 4 states. [2019-09-09 18:36:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:36:28,882 INFO L93 Difference]: Finished difference Result 2952 states and 3727 transitions. [2019-09-09 18:36:28,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:36:28,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 251 [2019-09-09 18:36:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:36:28,902 INFO L225 Difference]: With dead ends: 2952 [2019-09-09 18:36:28,902 INFO L226 Difference]: Without dead ends: 2952 [2019-09-09 18:36:28,903 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 18:36:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2019-09-09 18:36:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2586. [2019-09-09 18:36:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2586 states. [2019-09-09 18:36:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 3294 transitions. [2019-09-09 18:36:29,050 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 3294 transitions. Word has length 251 [2019-09-09 18:36:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:36:29,051 INFO L475 AbstractCegarLoop]: Abstraction has 2586 states and 3294 transitions. [2019-09-09 18:36:29,051 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:36:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 3294 transitions. [2019-09-09 18:36:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2019-09-09 18:36:29,065 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:36:29,065 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, 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, 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, 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] [2019-09-09 18:36:29,066 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:36:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:36:29,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1439821813, now seen corresponding path program 1 times [2019-09-09 18:36:29,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:36:29,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:29,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:36:29,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:29,068 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:36:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:36:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 171 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:36:29,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:36:29,487 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:36:29,488 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 383 with the following transitions: [2019-09-09 18:36:29,492 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:36:29,612 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:36:29,612 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:36:51,261 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:36:51,263 INFO L272 AbstractInterpreter]: Visited 184 different actions 184 times. Never merged. Never widened. Performed 397 root evaluator evaluations with a maximum evaluation depth of 14. Performed 397 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:36:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:36:51,267 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:37:22,021 INFO L227 lantSequenceWeakener]: Weakened 363 states. On average, predicates are now at 77.48% of their original sizes. [2019-09-09 18:37:22,022 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:37:22,163 INFO L420 sIntCurrentIteration]: We unified 381 AI predicates to 381 [2019-09-09 18:37:22,164 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:37:22,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:37:22,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [5] total 17 [2019-09-09 18:37:22,165 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:37:22,166 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-09 18:37:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-09 18:37:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-09-09 18:37:22,167 INFO L87 Difference]: Start difference. First operand 2586 states and 3294 transitions. Second operand 14 states. [2019-09-09 18:39:48,851 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:41:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:41:45,180 INFO L93 Difference]: Finished difference Result 2772 states and 3491 transitions. [2019-09-09 18:41:45,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:41:45,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 382 [2019-09-09 18:41:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:41:45,194 INFO L225 Difference]: With dead ends: 2772 [2019-09-09 18:41:45,194 INFO L226 Difference]: Without dead ends: 2772 [2019-09-09 18:41:45,195 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-09-09 18:41:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2019-09-09 18:41:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2768. [2019-09-09 18:41:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2019-09-09 18:41:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 3484 transitions. [2019-09-09 18:41:45,267 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 3484 transitions. Word has length 382 [2019-09-09 18:41:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:41:45,267 INFO L475 AbstractCegarLoop]: Abstraction has 2768 states and 3484 transitions. [2019-09-09 18:41:45,267 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-09 18:41:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 3484 transitions. [2019-09-09 18:41:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2019-09-09 18:41:45,283 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:41:45,284 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, 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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:41:45,284 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:41:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:41:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash 863750558, now seen corresponding path program 1 times [2019-09-09 18:41:45,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:41:45,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:41:45,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:41:45,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:41:45,289 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:41:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:41:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 68 proven. 279 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-09-09 18:41:45,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:41:45,775 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:41:45,776 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 493 with the following transitions: [2019-09-09 18:41:45,777 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:41:45,783 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:41:45,783 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:42:27,578 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:42:27,580 INFO L272 AbstractInterpreter]: Visited 188 different actions 371 times. Merged at 4 different actions 5 times. Never widened. Performed 823 root evaluator evaluations with a maximum evaluation depth of 14. Performed 823 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:42:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:42:27,581 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:43:04,201 INFO L227 lantSequenceWeakener]: Weakened 489 states. On average, predicates are now at 77.38% of their original sizes. [2019-09-09 18:43:04,201 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:43:04,347 INFO L420 sIntCurrentIteration]: We unified 491 AI predicates to 491 [2019-09-09 18:43:04,347 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:43:04,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:43:04,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [5] total 17 [2019-09-09 18:43:04,348 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:43:04,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-09 18:43:04,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-09 18:43:04,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-09-09 18:43:04,349 INFO L87 Difference]: Start difference. First operand 2768 states and 3484 transitions. Second operand 14 states. [2019-09-09 18:43:39,442 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:45:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:45:46,516 INFO L93 Difference]: Finished difference Result 2954 states and 3684 transitions. [2019-09-09 18:45:46,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-09 18:45:46,516 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 492 [2019-09-09 18:45:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:45:46,530 INFO L225 Difference]: With dead ends: 2954 [2019-09-09 18:45:46,530 INFO L226 Difference]: Without dead ends: 2954 [2019-09-09 18:45:46,531 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-09-09 18:45:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2019-09-09 18:45:46,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2019-09-09 18:45:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2019-09-09 18:45:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3682 transitions. [2019-09-09 18:45:46,600 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3682 transitions. Word has length 492 [2019-09-09 18:45:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:45:46,600 INFO L475 AbstractCegarLoop]: Abstraction has 2952 states and 3682 transitions. [2019-09-09 18:45:46,601 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-09 18:45:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3682 transitions. [2019-09-09 18:45:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2019-09-09 18:45:46,619 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:45:46,619 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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] [2019-09-09 18:45:46,620 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:45:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:45:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash -416810926, now seen corresponding path program 1 times [2019-09-09 18:45:46,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:45:46,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:45:46,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:45:46,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:45:46,622 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:45:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:45:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 173 proven. 320 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-09-09 18:45:47,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:45:47,588 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:45:47,588 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 550 with the following transitions: [2019-09-09 18:45:47,589 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:45:47,594 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:45:47,594 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:46:17,664 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:46:17,665 INFO L272 AbstractInterpreter]: Visited 189 different actions 373 times. Merged at 4 different actions 5 times. Never widened. Performed 679 root evaluator evaluations with a maximum evaluation depth of 14. Performed 679 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:46:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:46:17,666 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:46:33,438 INFO L227 lantSequenceWeakener]: Weakened 546 states. On average, predicates are now at 77.38% of their original sizes. [2019-09-09 18:46:33,439 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:46:33,539 INFO L420 sIntCurrentIteration]: We unified 548 AI predicates to 548 [2019-09-09 18:46:33,539 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:46:33,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:46:33,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 23 [2019-09-09 18:46:33,540 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:46:33,541 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-09 18:46:33,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-09 18:46:33,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-09-09 18:46:33,542 INFO L87 Difference]: Start difference. First operand 2952 states and 3682 transitions. Second operand 13 states. [2019-09-09 18:47:18,477 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.