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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:09:53,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:09:53,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:09:53,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:09:53,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:09:53,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:09:53,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:09:53,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:09:53,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:09:53,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:09:53,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:09:53,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:09:53,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:09:53,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:09:53,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:09:53,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:09:53,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:09:53,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:09:53,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:09:53,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:09:53,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:09:53,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:09:53,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:09:53,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:09:53,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:09:53,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:09:53,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:09:53,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:09:53,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:09:53,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:09:53,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:09:53,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:09:53,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:09:53,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:09:53,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:09:53,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:09:53,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:09:53,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:09:53,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:09:53,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:09:53,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:09:53,737 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:09:53,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:09:53,738 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:09:53,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:09:53,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:09:53,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:09:53,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:09:53,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:09:53,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:09:53,740 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:09:53,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:09:53,741 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:09:53,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:09:53,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:09:53,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:09:53,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:09:53,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:09:53,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:09:53,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:09:53,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:09:53,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:09:53,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:09:53,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:09:53,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:09:53,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:09:54,046 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:09:54,067 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:09:54,071 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:09:54,073 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:09:54,073 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:09:54,074 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-10-13 20:09:54,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ed220ca2/d3f1f34a57c142c58ad6ecb1fa713cb1/FLAG2c3b50da5 [2019-10-13 20:09:54,827 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:09:54,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-10-13 20:09:54,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ed220ca2/d3f1f34a57c142c58ad6ecb1fa713cb1/FLAG2c3b50da5 [2019-10-13 20:09:54,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ed220ca2/d3f1f34a57c142c58ad6ecb1fa713cb1 [2019-10-13 20:09:54,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:09:54,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:09:54,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:54,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:09:54,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:09:54,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:54" (1/1) ... [2019-10-13 20:09:55,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610e52c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:54, skipping insertion in model container [2019-10-13 20:09:55,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:54" (1/1) ... [2019-10-13 20:09:55,010 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:09:55,092 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:09:56,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:56,077 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:09:56,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:56,449 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:09:56,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56 WrapperNode [2019-10-13 20:09:56,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:56,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:09:56,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:09:56,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:09:56,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (1/1) ... [2019-10-13 20:09:56,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (1/1) ... [2019-10-13 20:09:56,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (1/1) ... [2019-10-13 20:09:56,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (1/1) ... [2019-10-13 20:09:56,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (1/1) ... [2019-10-13 20:09:56,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (1/1) ... [2019-10-13 20:09:56,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (1/1) ... [2019-10-13 20:09:56,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:09:56,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:09:56,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:09:56,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:09:56,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (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 [2019-10-13 20:09:56,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:09:56,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:09:56,718 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:09:56,718 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:09:56,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:09:56,718 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:09:56,718 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:09:56,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:09:56,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:09:56,719 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:09:56,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:09:56,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:09:56,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:09:59,142 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:09:59,142 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:09:59,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:59 BoogieIcfgContainer [2019-10-13 20:09:59,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:09:59,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:09:59,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:09:59,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:09:59,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:54" (1/3) ... [2019-10-13 20:09:59,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8a07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:59, skipping insertion in model container [2019-10-13 20:09:59,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:56" (2/3) ... [2019-10-13 20:09:59,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8a07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:59, skipping insertion in model container [2019-10-13 20:09:59,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:59" (3/3) ... [2019-10-13 20:09:59,198 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label36.c [2019-10-13 20:09:59,211 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:09:59,222 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:09:59,234 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:09:59,276 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:09:59,277 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:09:59,277 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:09:59,277 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:09:59,277 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:09:59,277 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:09:59,278 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:09:59,278 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:09:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:09:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 20:09:59,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:59,327 INFO L380 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] [2019-10-13 20:09:59,329 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1949415187, now seen corresponding path program 1 times [2019-10-13 20:09:59,345 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:59,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736349556] [2019-10-13 20:09:59,345 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:59,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:59,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:59,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736349556] [2019-10-13 20:09:59,636 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:59,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:09:59,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479200450] [2019-10-13 20:09:59,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:09:59,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:59,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:09:59,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:59,660 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:10:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:02,098 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:10:02,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:10:02,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2019-10-13 20:10:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:02,123 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:10:02,124 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:10:02,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:10:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:10:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:10:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:10:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-10-13 20:10:02,265 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 42 [2019-10-13 20:10:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:02,266 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-10-13 20:10:02,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:10:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-10-13 20:10:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 20:10:02,273 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:02,273 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:02,274 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:02,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:02,274 INFO L82 PathProgramCache]: Analyzing trace with hash -299851275, now seen corresponding path program 1 times [2019-10-13 20:10:02,275 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:02,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976789606] [2019-10-13 20:10:02,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:02,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:02,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:02,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976789606] [2019-10-13 20:10:02,632 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:02,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:02,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397277810] [2019-10-13 20:10:02,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:02,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:02,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:02,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:02,636 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-10-13 20:10:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:05,719 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-10-13 20:10:05,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:05,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-13 20:10:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:05,729 INFO L225 Difference]: With dead ends: 1733 [2019-10-13 20:10:05,730 INFO L226 Difference]: Without dead ends: 1057 [2019-10-13 20:10:05,732 INFO L600 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 [2019-10-13 20:10:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-10-13 20:10:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-10-13 20:10:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-13 20:10:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-10-13 20:10:05,771 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 149 [2019-10-13 20:10:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:05,772 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-10-13 20:10:05,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-10-13 20:10:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 20:10:05,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:05,776 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:05,776 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:05,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1372793628, now seen corresponding path program 1 times [2019-10-13 20:10:05,777 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:05,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122929469] [2019-10-13 20:10:05,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:05,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:05,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:05,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122929469] [2019-10-13 20:10:05,981 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:05,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:05,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555317192] [2019-10-13 20:10:05,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:05,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:05,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:05,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:05,984 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-10-13 20:10:09,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:09,983 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-10-13 20:10:09,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:09,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-13 20:10:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:10,000 INFO L225 Difference]: With dead ends: 3130 [2019-10-13 20:10:10,009 INFO L226 Difference]: Without dead ends: 2097 [2019-10-13 20:10:10,014 INFO L600 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 [2019-10-13 20:10:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-10-13 20:10:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-10-13 20:10:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-13 20:10:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-10-13 20:10:10,093 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 152 [2019-10-13 20:10:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:10,094 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-10-13 20:10:10,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-10-13 20:10:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-10-13 20:10:10,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:10,109 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:10:10,110 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1534192236, now seen corresponding path program 1 times [2019-10-13 20:10:10,110 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:10,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054598929] [2019-10-13 20:10:10,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:10,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:10,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 70 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:10,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054598929] [2019-10-13 20:10:10,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50806666] [2019-10-13 20:10:10,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:10,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:10,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 20:10:10,770 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 70 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:11,008 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:11,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:10:11,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746996525] [2019-10-13 20:10:11,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:11,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:10:11,012 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-10-13 20:10:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:14,023 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-10-13 20:10:14,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:14,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2019-10-13 20:10:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:14,048 INFO L225 Difference]: With dead ends: 6247 [2019-10-13 20:10:14,049 INFO L226 Difference]: Without dead ends: 4172 [2019-10-13 20:10:14,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 529 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:10:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-10-13 20:10:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-10-13 20:10:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-10-13 20:10:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-10-13 20:10:14,181 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 267 [2019-10-13 20:10:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:14,182 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-10-13 20:10:14,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-10-13 20:10:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2019-10-13 20:10:14,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:14,194 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:14,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:14,398 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:14,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1437688633, now seen corresponding path program 1 times [2019-10-13 20:10:14,400 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:14,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69451812] [2019-10-13 20:10:14,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:14,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:14,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 110 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:10:14,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69451812] [2019-10-13 20:10:14,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664278406] [2019-10-13 20:10:14,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:15,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:10:15,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 382 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 20:10:15,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 207 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-13 20:10:15,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1263712273] [2019-10-13 20:10:15,616 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 476 [2019-10-13 20:10:15,671 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:10:15,671 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:10:31,326 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:10:31,328 INFO L272 AbstractInterpreter]: Visited 224 different actions 224 times. Never merged. Never widened. Performed 422 root evaluator evaluations with a maximum evaluation depth of 14. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:10:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:31,332 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates