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/Problem12_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:23:49,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:23:49,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:23:49,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:23:49,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:23:49,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:23:49,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:23:49,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:23:49,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:23:49,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:23:49,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:23:49,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:23:49,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:23:49,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:23:49,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:23:49,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:23:49,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:23:49,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:23:49,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:23:49,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:23:49,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:23:49,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:23:49,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:23:49,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:23:49,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:23:49,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:23:49,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:23:49,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:23:49,635 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 16:23:49,661 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:23:49,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:23:49,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:23:49,662 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:23:49,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:23:49,663 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:23:49,663 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:23:49,663 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:23:49,663 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:23:49,664 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:23:49,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:23:49,666 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:23:49,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:23:49,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:23:49,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:23:49,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:23:49,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:23:49,667 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:23:49,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:23:49,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:23:49,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:23:49,668 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:23:49,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:23:49,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:23:49,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:23:49,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:23:49,670 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:23:49,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:23:49,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:23:49,670 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:23:49,721 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:23:49,737 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:23:49,742 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:23:49,743 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:23:49,744 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:23:49,745 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label33.c [2019-09-09 16:23:49,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c56b09e/02269909360f4338a0833fe4efdce494/FLAG89bd0cb5f [2019-09-09 16:23:50,568 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:23:50,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label33.c [2019-09-09 16:23:50,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c56b09e/02269909360f4338a0833fe4efdce494/FLAG89bd0cb5f [2019-09-09 16:23:51,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c56b09e/02269909360f4338a0833fe4efdce494 [2019-09-09 16:23:51,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:23:51,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:23:51,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:23:51,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:23:51,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:23:51,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:23:51" (1/1) ... [2019-09-09 16:23:51,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16df6fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:51, skipping insertion in model container [2019-09-09 16:23:51,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:23:51" (1/1) ... [2019-09-09 16:23:51,140 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:23:51,303 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:23:52,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:23:52,754 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:23:53,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:23:53,376 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:23:53,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53 WrapperNode [2019-09-09 16:23:53,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:23:53,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:23:53,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:23:53,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:23:53,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (1/1) ... [2019-09-09 16:23:53,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (1/1) ... [2019-09-09 16:23:53,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (1/1) ... [2019-09-09 16:23:53,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (1/1) ... [2019-09-09 16:23:53,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (1/1) ... [2019-09-09 16:23:53,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (1/1) ... [2019-09-09 16:23:53,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (1/1) ... [2019-09-09 16:23:53,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:23:53,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:23:53,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:23:53,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:23:53,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (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 16:23:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:23:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:23:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:23:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:23:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:23:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:23:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:23:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:23:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:23:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:23:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:23:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:23:53,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:23:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:23:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:23:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:23:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:23:58,646 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:23:58,647 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:23:58,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:23:58 BoogieIcfgContainer [2019-09-09 16:23:58,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:23:58,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:23:58,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:23:58,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:23:58,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:23:51" (1/3) ... [2019-09-09 16:23:58,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c3bce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:23:58, skipping insertion in model container [2019-09-09 16:23:58,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:23:53" (2/3) ... [2019-09-09 16:23:58,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c3bce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:23:58, skipping insertion in model container [2019-09-09 16:23:58,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:23:58" (3/3) ... [2019-09-09 16:23:58,656 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label33.c [2019-09-09 16:23:58,666 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:23:58,675 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:23:58,691 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:23:58,716 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:23:58,717 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:23:58,717 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:23:58,717 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:23:58,717 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:23:58,717 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:23:58,717 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:23:58,717 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:23:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 16:23:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-09 16:23:58,763 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:23:58,764 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:23:58,766 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:23:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:23:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1837034062, now seen corresponding path program 1 times [2019-09-09 16:23:58,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:23:58,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:23:58,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:23:58,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:23:58,820 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:23:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:23:59,145 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 16:23:59,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:23:59,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:23:59,148 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:23:59,154 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:23:59,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:23:59,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:23:59,173 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 4 states. [2019-09-09 16:24:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:24:07,520 INFO L93 Difference]: Finished difference Result 2397 states and 3955 transitions. [2019-09-09 16:24:07,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:24:07,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-09-09 16:24:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:24:07,556 INFO L225 Difference]: With dead ends: 2397 [2019-09-09 16:24:07,557 INFO L226 Difference]: Without dead ends: 2309 [2019-09-09 16:24:07,558 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 16:24:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-09-09 16:24:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2019-09-09 16:24:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-09-09 16:24:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3821 transitions. [2019-09-09 16:24:07,732 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3821 transitions. Word has length 55 [2019-09-09 16:24:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:24:07,734 INFO L475 AbstractCegarLoop]: Abstraction has 2309 states and 3821 transitions. [2019-09-09 16:24:07,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:24:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3821 transitions. [2019-09-09 16:24:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-09 16:24:07,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:24:07,753 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:24:07,753 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:24:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:24:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1114761445, now seen corresponding path program 1 times [2019-09-09 16:24:07,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:24:07,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:24:07,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:24:07,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:24:07,757 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:24:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:24:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:24:08,088 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:24:08,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:24:08,089 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:24:08,090 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:24:08,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:24:08,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:24:08,092 INFO L87 Difference]: Start difference. First operand 2309 states and 3821 transitions. Second operand 6 states. [2019-09-09 16:24:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:24:14,376 INFO L93 Difference]: Finished difference Result 4742 states and 7593 transitions. [2019-09-09 16:24:14,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:24:14,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2019-09-09 16:24:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:24:14,408 INFO L225 Difference]: With dead ends: 4742 [2019-09-09 16:24:14,408 INFO L226 Difference]: Without dead ends: 4742 [2019-09-09 16:24:14,409 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 16:24:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2019-09-09 16:24:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2019-09-09 16:24:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2019-09-09 16:24:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 7461 transitions. [2019-09-09 16:24:14,573 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 7461 transitions. Word has length 154 [2019-09-09 16:24:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:24:14,574 INFO L475 AbstractCegarLoop]: Abstraction has 4697 states and 7461 transitions. [2019-09-09 16:24:14,574 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:24:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 7461 transitions. [2019-09-09 16:24:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-09 16:24:14,579 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:24:14,579 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 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 16:24:14,579 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:24:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:24:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1950696993, now seen corresponding path program 1 times [2019-09-09 16:24:14,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:24:14,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:24:14,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:24:14,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:24:14,582 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:24:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:24:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:24:14,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:24:14,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:24:14,845 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:24:14,847 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:24:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:24:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:24:14,848 INFO L87 Difference]: Start difference. First operand 4697 states and 7461 transitions. Second operand 4 states. [2019-09-09 16:24:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:24:22,348 INFO L93 Difference]: Finished difference Result 14045 states and 22285 transitions. [2019-09-09 16:24:22,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:24:22,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 204 [2019-09-09 16:24:22,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:24:22,431 INFO L225 Difference]: With dead ends: 14045 [2019-09-09 16:24:22,432 INFO L226 Difference]: Without dead ends: 14045 [2019-09-09 16:24:22,441 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 16:24:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14045 states. [2019-09-09 16:24:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14045 to 14045. [2019-09-09 16:24:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14045 states. [2019-09-09 16:24:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14045 states to 14045 states and 22285 transitions. [2019-09-09 16:24:22,805 INFO L78 Accepts]: Start accepts. Automaton has 14045 states and 22285 transitions. Word has length 204 [2019-09-09 16:24:22,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:24:22,807 INFO L475 AbstractCegarLoop]: Abstraction has 14045 states and 22285 transitions. [2019-09-09 16:24:22,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:24:22,807 INFO L276 IsEmpty]: Start isEmpty. Operand 14045 states and 22285 transitions. [2019-09-09 16:24:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-09 16:24:22,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:24:22,814 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:24:22,815 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:24:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:24:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash -972211546, now seen corresponding path program 1 times [2019-09-09 16:24:22,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:24:22,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:24:22,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:24:22,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:24:22,817 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:24:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:24:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 16:24:23,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:24:23,008 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:24:23,009 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2019-09-09 16:24:23,011 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2215], [2217], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2376], [2377], [2381], [2385], [2389], [2393], [2397], [2400], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 16:24:23,096 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:24:23,097 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:24:31,682 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:24:31,684 INFO L272 AbstractInterpreter]: Visited 84 different actions 84 times. Never merged. Never widened. Performed 212 root evaluator evaluations with a maximum evaluation depth of 16. Performed 212 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 16:24:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:24:31,688 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 16:24:40,717 INFO L227 lantSequenceWeakener]: Weakened 188 states. On average, predicates are now at 75.96% of their original sizes. [2019-09-09 16:24:40,718 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 16:24:40,826 INFO L420 sIntCurrentIteration]: We unified 206 AI predicates to 206 [2019-09-09 16:24:40,827 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 16:24:40,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 16:24:40,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2019-09-09 16:24:40,829 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:24:40,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 16:24:40,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 16:24:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 16:24:40,831 INFO L87 Difference]: Start difference. First operand 14045 states and 22285 transitions. Second operand 11 states. [2019-09-09 16:27:43,943 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.