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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:17,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:17,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:17,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:17,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:17,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:17,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:17,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:17,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:17,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:17,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:17,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:17,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:17,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:17,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:17,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:17,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:17,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:17,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:17,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:17,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:17,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:17,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:17,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:17,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:17,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:17,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:17,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:17,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:17,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:17,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:17,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:17,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:17,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:17,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:17,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:17,094 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 20:11:17,123 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:17,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:17,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:17,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:17,125 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:17,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:17,125 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:17,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:17,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:17,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:17,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:17,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:17,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:17,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:17,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:17,127 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:17,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:17,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:17,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:17,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:17,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:17,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:17,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:17,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:17,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:17,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:17,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:17,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:17,129 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 20:11:17,461 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:17,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:17,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:17,483 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:17,483 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:17,484 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label37.c [2019-10-13 20:11:17,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151fec8d9/a3c93dcbf69d49959b4fa6cf5cd4c66f/FLAGb76fc0729 [2019-10-13 20:11:18,301 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:18,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label37.c [2019-10-13 20:11:18,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151fec8d9/a3c93dcbf69d49959b4fa6cf5cd4c66f/FLAGb76fc0729 [2019-10-13 20:11:18,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151fec8d9/a3c93dcbf69d49959b4fa6cf5cd4c66f [2019-10-13 20:11:18,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:18,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:18,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:18,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:18,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:18,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:18" (1/1) ... [2019-10-13 20:11:18,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47fbaaba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:18, skipping insertion in model container [2019-10-13 20:11:18,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:18" (1/1) ... [2019-10-13 20:11:18,431 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:18,564 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:19,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:19,910 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:20,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:20,414 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:20,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20 WrapperNode [2019-10-13 20:11:20,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:20,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:20,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:20,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:20,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (1/1) ... [2019-10-13 20:11:20,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (1/1) ... [2019-10-13 20:11:20,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (1/1) ... [2019-10-13 20:11:20,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (1/1) ... [2019-10-13 20:11:20,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (1/1) ... [2019-10-13 20:11:20,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (1/1) ... [2019-10-13 20:11:20,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (1/1) ... [2019-10-13 20:11:20,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:20,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:20,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:20,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:20,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (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 20:11:20,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:20,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:20,810 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:20,810 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:20,810 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:20,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:20,810 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:20,810 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:20,810 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:24,601 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:24,602 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:24,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:24 BoogieIcfgContainer [2019-10-13 20:11:24,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:24,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:24,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:24,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:24,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:18" (1/3) ... [2019-10-13 20:11:24,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bffffd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:24, skipping insertion in model container [2019-10-13 20:11:24,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:20" (2/3) ... [2019-10-13 20:11:24,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bffffd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:24, skipping insertion in model container [2019-10-13 20:11:24,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:24" (3/3) ... [2019-10-13 20:11:24,629 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label37.c [2019-10-13 20:11:24,644 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:24,658 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:24,671 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:24,714 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:24,715 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:24,715 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:24,715 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:24,715 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:24,715 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:24,716 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:24,716 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 20:11:24,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:24,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:24,766 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:24,772 INFO L82 PathProgramCache]: Analyzing trace with hash -545503303, now seen corresponding path program 1 times [2019-10-13 20:11:24,782 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:24,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581972897] [2019-10-13 20:11:24,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:24,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:24,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:25,179 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 20:11:25,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581972897] [2019-10-13 20:11:25,181 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:25,182 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:25,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821123043] [2019-10-13 20:11:25,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:25,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:25,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:25,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:25,209 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:29,656 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:29,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:29,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2019-10-13 20:11:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:29,692 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:29,693 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:29,705 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 20:11:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-10-13 20:11:29,848 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 62 [2019-10-13 20:11:29,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:29,849 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-10-13 20:11:29,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-10-13 20:11:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 20:11:29,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:29,857 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, 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] [2019-10-13 20:11:29,857 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1269044687, now seen corresponding path program 1 times [2019-10-13 20:11:29,858 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:29,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166522717] [2019-10-13 20:11:29,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:29,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:29,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:29,991 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166522717] [2019-10-13 20:11:29,991 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:29,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:11:29,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853900394] [2019-10-13 20:11:29,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:29,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:29,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:11:29,995 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-10-13 20:11:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:35,274 INFO L93 Difference]: Finished difference Result 3572 states and 6416 transitions. [2019-10-13 20:11:35,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:35,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-10-13 20:11:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:35,288 INFO L225 Difference]: With dead ends: 3572 [2019-10-13 20:11:35,288 INFO L226 Difference]: Without dead ends: 2166 [2019-10-13 20:11:35,292 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 20:11:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-10-13 20:11:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-10-13 20:11:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-10-13 20:11:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-10-13 20:11:35,354 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 133 [2019-10-13 20:11:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:35,354 INFO L462 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-10-13 20:11:35,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:11:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-10-13 20:11:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 20:11:35,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:35,366 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, 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] [2019-10-13 20:11:35,368 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1629453244, now seen corresponding path program 1 times [2019-10-13 20:11:35,368 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:35,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711733458] [2019-10-13 20:11:35,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:35,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:35,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:35,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711733458] [2019-10-13 20:11:35,608 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:35,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:35,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439477460] [2019-10-13 20:11:35,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:35,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:35,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:35,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:35,610 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-10-13 20:11:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:40,475 INFO L93 Difference]: Finished difference Result 5051 states and 8506 transitions. [2019-10-13 20:11:40,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:40,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-10-13 20:11:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:40,492 INFO L225 Difference]: With dead ends: 5051 [2019-10-13 20:11:40,493 INFO L226 Difference]: Without dead ends: 2911 [2019-10-13 20:11:40,498 INFO L600 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 [2019-10-13 20:11:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-10-13 20:11:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-10-13 20:11:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-10-13 20:11:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-10-13 20:11:40,574 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 156 [2019-10-13 20:11:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:40,575 INFO L462 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-10-13 20:11:40,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-10-13 20:11:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 20:11:40,577 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:40,578 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, 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] [2019-10-13 20:11:40,578 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:40,579 INFO L82 PathProgramCache]: Analyzing trace with hash 242415228, now seen corresponding path program 1 times [2019-10-13 20:11:40,579 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:40,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352223221] [2019-10-13 20:11:40,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:40,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:40,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:40,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352223221] [2019-10-13 20:11:40,746 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:40,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:40,746 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289823457] [2019-10-13 20:11:40,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:40,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:40,748 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-10-13 20:11:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:45,302 INFO L93 Difference]: Finished difference Result 6543 states and 10148 transitions. [2019-10-13 20:11:45,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:45,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-10-13 20:11:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:45,319 INFO L225 Difference]: With dead ends: 6543 [2019-10-13 20:11:45,320 INFO L226 Difference]: Without dead ends: 3662 [2019-10-13 20:11:45,326 INFO L600 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 [2019-10-13 20:11:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-10-13 20:11:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-10-13 20:11:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-10-13 20:11:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-10-13 20:11:45,413 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 160 [2019-10-13 20:11:45,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:45,414 INFO L462 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-10-13 20:11:45,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-10-13 20:11:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 20:11:45,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:45,417 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:45,418 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash -4380259, now seen corresponding path program 1 times [2019-10-13 20:11:45,418 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:45,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599533631] [2019-10-13 20:11:45,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:45,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:45,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:45,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599533631] [2019-10-13 20:11:45,577 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:45,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:45,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222148731] [2019-10-13 20:11:45,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:45,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:45,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:45,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:45,579 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-10-13 20:11:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:50,510 INFO L93 Difference]: Finished difference Result 10404 states and 14982 transitions. [2019-10-13 20:11:50,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:50,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2019-10-13 20:11:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:50,544 INFO L225 Difference]: With dead ends: 10404 [2019-10-13 20:11:50,545 INFO L226 Difference]: Without dead ends: 6768 [2019-10-13 20:11:50,555 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 20:11:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-10-13 20:11:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-10-13 20:11:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-10-13 20:11:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-10-13 20:11:50,751 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 191 [2019-10-13 20:11:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:50,752 INFO L462 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-10-13 20:11:50,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-10-13 20:11:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-13 20:11:50,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:50,759 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, 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, 1, 1, 1, 1, 1, 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 20:11:50,759 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1134912638, now seen corresponding path program 1 times [2019-10-13 20:11:50,760 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:50,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104214832] [2019-10-13 20:11:50,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:50,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:50,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 110 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:51,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104214832] [2019-10-13 20:11:51,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726168285] [2019-10-13 20:11:51,010 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 20:11:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:51,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:11:51,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 20:11:51,289 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 110 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:51,444 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:11:51,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-13 20:11:51,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273540172] [2019-10-13 20:11:51,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:51,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:51,451 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 5 states.