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/Problem18_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:22:35,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:22:35,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:22:35,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 22:22:35,498 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 22:22:35,520 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:22:35,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:22:35,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:22:35,521 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:22:35,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:22:35,522 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:22:35,522 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:22:35,522 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:22:35,522 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:22:35,522 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:22:35,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:22:35,524 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:22:35,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:22:35,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:22:35,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:22:35,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:22:35,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:22:35,525 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:22:35,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:22:35,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:22:35,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:22:35,526 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:22:35,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:22:35,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:22:35,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:22:35,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:22:35,527 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:22:35,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:22:35,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:22:35,528 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:22:35,573 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:22:35,587 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:22:35,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:22:35,594 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:22:35,596 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:22:35,597 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label33.c [2019-09-09 22:22:35,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324eada8e/5b87044bdf694407aadd576f3a61928e/FLAGb7f63eb42 [2019-09-09 22:22:36,322 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:22:36,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label33.c [2019-09-09 22:22:36,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324eada8e/5b87044bdf694407aadd576f3a61928e/FLAGb7f63eb42 [2019-09-09 22:22:36,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324eada8e/5b87044bdf694407aadd576f3a61928e [2019-09-09 22:22:36,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:22:36,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:22:36,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:22:36,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:22:36,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:22:36,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:22:36" (1/1) ... [2019-09-09 22:22:36,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e5ebd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:36, skipping insertion in model container [2019-09-09 22:22:36,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:22:36" (1/1) ... [2019-09-09 22:22:36,478 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:22:36,606 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:22:37,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:22:37,755 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:22:38,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:22:38,221 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:22:38,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38 WrapperNode [2019-09-09 22:22:38,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:22:38,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:22:38,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:22:38,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:22:38,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (1/1) ... [2019-09-09 22:22:38,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (1/1) ... [2019-09-09 22:22:38,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (1/1) ... [2019-09-09 22:22:38,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (1/1) ... [2019-09-09 22:22:38,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (1/1) ... [2019-09-09 22:22:38,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (1/1) ... [2019-09-09 22:22:38,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (1/1) ... [2019-09-09 22:22:38,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:22:38,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:22:38,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:22:38,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:22:38,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (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 22:22:38,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:22:38,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:22:38,626 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:22:38,626 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:22:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:22:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:22:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:22:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:22:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:22:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:22:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:22:38,630 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:22:38,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:22:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:22:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:22:42,373 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:22:42,373 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:22:42,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:22:42 BoogieIcfgContainer [2019-09-09 22:22:42,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:22:42,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:22:42,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:22:42,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:22:42,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:22:36" (1/3) ... [2019-09-09 22:22:42,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d4c556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:22:42, skipping insertion in model container [2019-09-09 22:22:42,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:22:38" (2/3) ... [2019-09-09 22:22:42,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d4c556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:22:42, skipping insertion in model container [2019-09-09 22:22:42,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:22:42" (3/3) ... [2019-09-09 22:22:42,397 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label33.c [2019-09-09 22:22:42,410 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:22:42,422 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:22:42,441 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:22:42,472 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:22:42,472 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:22:42,472 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:22:42,472 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:22:42,473 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:22:42,473 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:22:42,473 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:22:42,473 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:22:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:22:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-09 22:22:42,519 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:22:42,520 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] [2019-09-09 22:22:42,522 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:22:42,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:22:42,528 INFO L82 PathProgramCache]: Analyzing trace with hash -666712142, now seen corresponding path program 1 times [2019-09-09 22:22:42,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:22:42,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:22:42,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:22:42,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:22:42,585 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:22:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:22:42,787 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 22:22:42,789 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:22:42,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:22:42,790 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:22:42,795 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:22:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:22:42,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:22:42,813 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:22:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:22:47,570 INFO L93 Difference]: Finished difference Result 1480 states and 2747 transitions. [2019-09-09 22:22:47,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:22:47,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-09-09 22:22:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:22:47,608 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:22:47,608 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:22:47,610 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 22:22:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:22:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:22:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:22:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-09-09 22:22:47,738 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 29 [2019-09-09 22:22:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:22:47,739 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-09-09 22:22:47,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:22:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-09-09 22:22:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 22:22:47,744 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:22:47,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:47,745 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:22:47,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:22:47,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1928488255, now seen corresponding path program 1 times [2019-09-09 22:22:47,746 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:22:47,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:22:47,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:22:47,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:22:47,748 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:22:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:22:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:22:48,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:22:48,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:22:48,019 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:22:48,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:22:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:22:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:22:48,022 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-09-09 22:22:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:22:53,725 INFO L93 Difference]: Finished difference Result 2882 states and 5191 transitions. [2019-09-09 22:22:53,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:22:53,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-09-09 22:22:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:22:53,745 INFO L225 Difference]: With dead ends: 2882 [2019-09-09 22:22:53,745 INFO L226 Difference]: Without dead ends: 2882 [2019-09-09 22:22:53,746 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 22:22:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2019-09-09 22:22:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2858. [2019-09-09 22:22:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2019-09-09 22:22:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 5137 transitions. [2019-09-09 22:22:53,827 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 5137 transitions. Word has length 118 [2019-09-09 22:22:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:22:53,827 INFO L475 AbstractCegarLoop]: Abstraction has 2858 states and 5137 transitions. [2019-09-09 22:22:53,828 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:22:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 5137 transitions. [2019-09-09 22:22:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-09 22:22:53,831 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:22:53,831 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:22:53,831 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:22:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:22:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1383839650, now seen corresponding path program 1 times [2019-09-09 22:22:53,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:22:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:22:53,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:22:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:22:53,834 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:22:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:22:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:22:53,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:22:53,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:22:53,994 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:22:53,994 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:22:53,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:22:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:22:53,995 INFO L87 Difference]: Start difference. First operand 2858 states and 5137 transitions. Second operand 6 states. [2019-09-09 22:23:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:23:03,812 INFO L93 Difference]: Finished difference Result 8774 states and 14051 transitions. [2019-09-09 22:23:03,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 22:23:03,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-09-09 22:23:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:23:03,864 INFO L225 Difference]: With dead ends: 8774 [2019-09-09 22:23:03,864 INFO L226 Difference]: Without dead ends: 8774 [2019-09-09 22:23:03,865 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:23:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2019-09-09 22:23:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 8718. [2019-09-09 22:23:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8718 states. [2019-09-09 22:23:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8718 states to 8718 states and 13633 transitions. [2019-09-09 22:23:04,127 INFO L78 Accepts]: Start accepts. Automaton has 8718 states and 13633 transitions. Word has length 119 [2019-09-09 22:23:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:23:04,128 INFO L475 AbstractCegarLoop]: Abstraction has 8718 states and 13633 transitions. [2019-09-09 22:23:04,128 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:23:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 8718 states and 13633 transitions. [2019-09-09 22:23:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-09-09 22:23:04,134 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:23:04,134 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 22:23:04,135 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:23:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:04,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1243491523, now seen corresponding path program 1 times [2019-09-09 22:23:04,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:23:04,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:04,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:23:04,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:04,137 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:23:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:23:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 44 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 22:23:04,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:23:04,358 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:23:04,359 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 189 with the following transitions: [2019-09-09 22:23:04,362 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1763], [1765], [1768], [1776], [1784], [1792], [1800], [1808], [1816], [1824], [1832], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2116], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2200], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:23:04,442 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:23:04,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:23:08,855 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:23:08,856 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 13. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:23:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:08,860 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:23:12,355 INFO L227 lantSequenceWeakener]: Weakened 169 states. On average, predicates are now at 77.74% of their original sizes. [2019-09-09 22:23:12,355 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:23:12,415 INFO L420 sIntCurrentIteration]: We unified 187 AI predicates to 187 [2019-09-09 22:23:12,415 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:23:12,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:23:12,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2019-09-09 22:23:12,416 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:23:12,417 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:23:12,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:23:12,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:23:12,418 INFO L87 Difference]: Start difference. First operand 8718 states and 13633 transitions. Second operand 10 states. [2019-09-09 22:25:43,295 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.