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/Problem18_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:44,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:44,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:44,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:44,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:44,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:44,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:44,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:44,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:44,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:44,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:44,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:44,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:44,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:44,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:44,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:44,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:44,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:44,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:44,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:44,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:44,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:44,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:44,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:44,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:44,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:44,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:44,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:44,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:44,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:44,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:44,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:44,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:44,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:44,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:44,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:44,097 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 20:11:44,127 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:44,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:44,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:44,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:44,133 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:44,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:44,134 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:44,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:44,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:44,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:44,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:44,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:44,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:44,135 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:44,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:44,135 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:44,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:44,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:44,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:44,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:44,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:44,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:44,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:44,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:44,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:44,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:44,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:44,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:44,138 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 20:11:44,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:44,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:44,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:44,429 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:44,429 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:44,430 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label59.c [2019-10-13 20:11:44,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994dced87/ef9665c8b0c84779a66d495067509e1d/FLAGab05fd35d [2019-10-13 20:11:45,240 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:45,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label59.c [2019-10-13 20:11:45,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994dced87/ef9665c8b0c84779a66d495067509e1d/FLAGab05fd35d [2019-10-13 20:11:45,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994dced87/ef9665c8b0c84779a66d495067509e1d [2019-10-13 20:11:45,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:45,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:45,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:45,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:45,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:45,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:45" (1/1) ... [2019-10-13 20:11:45,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c76a8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:45, skipping insertion in model container [2019-10-13 20:11:45,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:45" (1/1) ... [2019-10-13 20:11:45,390 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:45,510 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:46,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:46,917 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:47,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:47,391 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:47,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47 WrapperNode [2019-10-13 20:11:47,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:47,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:47,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:47,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:47,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:47,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:47,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:47,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:47,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (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 20:11:47,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:47,739 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:47,739 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:47,739 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:47,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:47,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:47,740 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:47,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:47,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:47,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:51,604 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:51,607 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:51,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:51 BoogieIcfgContainer [2019-10-13 20:11:51,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:51,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:51,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:51,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:51,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:45" (1/3) ... [2019-10-13 20:11:51,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae1cb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:51, skipping insertion in model container [2019-10-13 20:11:51,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (2/3) ... [2019-10-13 20:11:51,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae1cb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:51, skipping insertion in model container [2019-10-13 20:11:51,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:51" (3/3) ... [2019-10-13 20:11:51,626 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label59.c [2019-10-13 20:11:51,643 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:51,660 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:51,672 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:51,717 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:51,717 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:51,717 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:51,717 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:51,717 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:51,718 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:51,718 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:51,718 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 20:11:51,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:51,769 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, 1] [2019-10-13 20:11:51,772 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:51,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1601296886, now seen corresponding path program 1 times [2019-10-13 20:11:51,788 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:51,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258571098] [2019-10-13 20:11:51,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:51,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:51,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:52,150 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 20:11:52,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258571098] [2019-10-13 20:11:52,152 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:52,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:52,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355295179] [2019-10-13 20:11:52,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:52,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:52,181 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:56,673 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:56,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:56,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-13 20:11:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:56,705 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:56,705 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:56,717 INFO L600 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 [2019-10-13 20:11:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-13 20:11:56,849 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 43 [2019-10-13 20:11:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:56,849 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-13 20:11:56,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-13 20:11:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 20:11:56,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:56,856 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, 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] [2019-10-13 20:11:56,856 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1229064497, now seen corresponding path program 1 times [2019-10-13 20:11:56,857 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:56,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801474865] [2019-10-13 20:11:56,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:56,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:56,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:57,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801474865] [2019-10-13 20:11:57,047 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:57,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:11:57,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154526294] [2019-10-13 20:11:57,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:57,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:11:57,051 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 5 states. [2019-10-13 20:12:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:02,353 INFO L93 Difference]: Finished difference Result 4291 states and 8027 transitions. [2019-10-13 20:12:02,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:02,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2019-10-13 20:12:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:02,376 INFO L225 Difference]: With dead ends: 4291 [2019-10-13 20:12:02,376 INFO L226 Difference]: Without dead ends: 2885 [2019-10-13 20:12:02,381 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:12:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-10-13 20:12:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2861. [2019-10-13 20:12:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2019-10-13 20:12:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4925 transitions. [2019-10-13 20:12:02,508 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4925 transitions. Word has length 112 [2019-10-13 20:12:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:02,510 INFO L462 AbstractCegarLoop]: Abstraction has 2861 states and 4925 transitions. [2019-10-13 20:12:02,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:12:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4925 transitions. [2019-10-13 20:12:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 20:12:02,520 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:02,521 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, 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] [2019-10-13 20:12:02,521 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash -25302418, now seen corresponding path program 1 times [2019-10-13 20:12:02,523 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:02,523 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603894995] [2019-10-13 20:12:02,523 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:02,523 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:02,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:02,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603894995] [2019-10-13 20:12:02,719 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:02,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:12:02,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895148667] [2019-10-13 20:12:02,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:12:02,723 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:02,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:12:02,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:12:02,728 INFO L87 Difference]: Start difference. First operand 2861 states and 4925 transitions. Second operand 5 states. [2019-10-13 20:12:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:07,871 INFO L93 Difference]: Finished difference Result 7211 states and 12315 transitions. [2019-10-13 20:12:07,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:07,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2019-10-13 20:12:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:07,894 INFO L225 Difference]: With dead ends: 7211 [2019-10-13 20:12:07,894 INFO L226 Difference]: Without dead ends: 4356 [2019-10-13 20:12:07,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:12:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2019-10-13 20:12:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 4325. [2019-10-13 20:12:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4325 states. [2019-10-13 20:12:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 6079 transitions. [2019-10-13 20:12:08,041 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 6079 transitions. Word has length 113 [2019-10-13 20:12:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:08,042 INFO L462 AbstractCegarLoop]: Abstraction has 4325 states and 6079 transitions. [2019-10-13 20:12:08,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:12:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 6079 transitions. [2019-10-13 20:12:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 20:12:08,044 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:08,044 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, 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] [2019-10-13 20:12:08,044 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1998315758, now seen corresponding path program 1 times [2019-10-13 20:12:08,045 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:08,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855333412] [2019-10-13 20:12:08,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:08,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:08,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:08,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855333412] [2019-10-13 20:12:08,160 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:08,160 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:12:08,161 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004661773] [2019-10-13 20:12:08,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:12:08,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:08,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:12:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:12:08,162 INFO L87 Difference]: Start difference. First operand 4325 states and 6079 transitions. Second operand 5 states. [2019-10-13 20:12:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:14,395 INFO L93 Difference]: Finished difference Result 13274 states and 19026 transitions. [2019-10-13 20:12:14,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:12:14,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-13 20:12:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:14,438 INFO L225 Difference]: With dead ends: 13274 [2019-10-13 20:12:14,439 INFO L226 Difference]: Without dead ends: 8955 [2019-10-13 20:12:14,451 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:12:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8955 states. [2019-10-13 20:12:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8955 to 8798. [2019-10-13 20:12:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8798 states. [2019-10-13 20:12:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 11426 transitions. [2019-10-13 20:12:14,717 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 11426 transitions. Word has length 115 [2019-10-13 20:12:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:14,718 INFO L462 AbstractCegarLoop]: Abstraction has 8798 states and 11426 transitions. [2019-10-13 20:12:14,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:12:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 11426 transitions. [2019-10-13 20:12:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 20:12:14,719 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:14,720 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, 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] [2019-10-13 20:12:14,720 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2016787783, now seen corresponding path program 1 times [2019-10-13 20:12:14,721 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:14,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156020872] [2019-10-13 20:12:14,722 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:14,722 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:14,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:14,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156020872] [2019-10-13 20:12:14,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:14,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:12:14,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308133364] [2019-10-13 20:12:14,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:12:14,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:14,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:12:14,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:12:14,886 INFO L87 Difference]: Start difference. First operand 8798 states and 11426 transitions. Second operand 3 states. [2019-10-13 20:12:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:18,931 INFO L93 Difference]: Finished difference Result 25412 states and 33528 transitions. [2019-10-13 20:12:18,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:12:18,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-13 20:12:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:18,990 INFO L225 Difference]: With dead ends: 25412 [2019-10-13 20:12:18,990 INFO L226 Difference]: Without dead ends: 16620 [2019-10-13 20:12:19,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 20:12:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16620 states. [2019-10-13 20:12:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16620 to 15908. [2019-10-13 20:12:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15908 states. [2019-10-13 20:12:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15908 states to 15908 states and 19164 transitions. [2019-10-13 20:12:19,301 INFO L78 Accepts]: Start accepts. Automaton has 15908 states and 19164 transitions. Word has length 140 [2019-10-13 20:12:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:19,303 INFO L462 AbstractCegarLoop]: Abstraction has 15908 states and 19164 transitions. [2019-10-13 20:12:19,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:12:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 15908 states and 19164 transitions. [2019-10-13 20:12:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-13 20:12:19,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:19,311 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:19,311 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:19,312 INFO L82 PathProgramCache]: Analyzing trace with hash 894224995, now seen corresponding path program 1 times [2019-10-13 20:12:19,312 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:19,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956219344] [2019-10-13 20:12:19,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:19,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:19,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 20:12:19,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956219344] [2019-10-13 20:12:19,565 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:19,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:12:19,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161493246] [2019-10-13 20:12:19,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:12:19,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:19,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:12:19,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:12:19,568 INFO L87 Difference]: Start difference. First operand 15908 states and 19164 transitions. Second operand 4 states.