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/Problem15_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:08:26,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:08:26,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:08:26,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:08:26,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:08:26,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:08:26,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:08:26,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:08:26,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:08:26,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:08:26,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:08:26,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:08:26,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:08:26,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:08:26,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:08:26,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:08:26,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:08:26,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:08:26,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:08:26,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:08:26,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:08:26,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:08:26,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:08:26,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:08:26,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:08:26,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:08:26,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:08:26,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:08:26,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:08:26,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:08:26,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:08:26,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:08:26,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:08:26,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:08:26,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:08:26,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:08:26,194 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 20:08:26,215 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:08:26,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:08:26,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:08:26,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:08:26,220 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:08:26,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:08:26,220 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:08:26,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:08:26,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:08:26,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:08:26,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:08:26,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:08:26,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:08:26,222 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:08:26,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:08:26,222 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:08:26,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:08:26,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:08:26,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:08:26,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:08:26,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:08:26,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:08:26,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:08:26,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:08:26,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:08:26,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:08:26,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:08:26,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:08:26,225 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 20:08:26,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:08:26,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:08:26,562 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:08:26,564 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:08:26,564 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:08:26,565 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-10-13 20:08:26,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d700f05ca/61a61c7237a8460e9b407958b15543a8/FLAG977b1b7eb [2019-10-13 20:08:27,355 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:08:27,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-10-13 20:08:27,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d700f05ca/61a61c7237a8460e9b407958b15543a8/FLAG977b1b7eb [2019-10-13 20:08:27,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d700f05ca/61a61c7237a8460e9b407958b15543a8 [2019-10-13 20:08:27,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:08:27,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:08:27,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:27,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:08:27,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:08:27,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:27" (1/1) ... [2019-10-13 20:08:27,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7698cf5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:27, skipping insertion in model container [2019-10-13 20:08:27,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:27" (1/1) ... [2019-10-13 20:08:27,616 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:08:27,710 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:08:28,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:28,634 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:08:29,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:29,075 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:08:29,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29 WrapperNode [2019-10-13 20:08:29,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:29,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:08:29,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:08:29,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:08:29,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (1/1) ... [2019-10-13 20:08:29,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (1/1) ... [2019-10-13 20:08:29,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (1/1) ... [2019-10-13 20:08:29,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (1/1) ... [2019-10-13 20:08:29,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (1/1) ... [2019-10-13 20:08:29,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (1/1) ... [2019-10-13 20:08:29,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (1/1) ... [2019-10-13 20:08:29,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:08:29,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:08:29,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:08:29,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:08:29,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (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 20:08:29,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:08:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:08:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:08:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:08:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:08:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:08:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:08:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:08:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:08:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:08:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:08:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:08:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:08:33,548 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:08:33,548 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:08:33,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:33 BoogieIcfgContainer [2019-10-13 20:08:33,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:08:33,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:08:33,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:08:33,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:08:33,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:27" (1/3) ... [2019-10-13 20:08:33,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ddcce2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:33, skipping insertion in model container [2019-10-13 20:08:33,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:29" (2/3) ... [2019-10-13 20:08:33,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ddcce2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:33, skipping insertion in model container [2019-10-13 20:08:33,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:33" (3/3) ... [2019-10-13 20:08:33,574 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label33.c [2019-10-13 20:08:33,586 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:08:33,598 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:08:33,612 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:08:33,658 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:08:33,659 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:08:33,659 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:08:33,659 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:08:33,659 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:08:33,659 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:08:33,659 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:08:33,659 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:08:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 20:08:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 20:08:33,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:33,697 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] [2019-10-13 20:08:33,699 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:33,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash 726540760, now seen corresponding path program 1 times [2019-10-13 20:08:33,713 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:33,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099367908] [2019-10-13 20:08:33,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:33,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:33,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:34,021 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 20:08:34,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099367908] [2019-10-13 20:08:34,023 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:34,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:34,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866702861] [2019-10-13 20:08:34,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:34,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:34,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:34,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:34,049 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-13 20:08:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:38,590 INFO L93 Difference]: Finished difference Result 1546 states and 2831 transitions. [2019-10-13 20:08:38,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:38,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-10-13 20:08:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:38,625 INFO L225 Difference]: With dead ends: 1546 [2019-10-13 20:08:38,625 INFO L226 Difference]: Without dead ends: 1028 [2019-10-13 20:08:38,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-10-13 20:08:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 700. [2019-10-13 20:08:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-13 20:08:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1110 transitions. [2019-10-13 20:08:38,749 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1110 transitions. Word has length 28 [2019-10-13 20:08:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:38,752 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1110 transitions. [2019-10-13 20:08:38,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1110 transitions. [2019-10-13 20:08:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 20:08:38,759 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:38,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:38,760 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:38,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1804858835, now seen corresponding path program 1 times [2019-10-13 20:08:38,761 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:38,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497345453] [2019-10-13 20:08:38,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:38,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:38,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:39,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497345453] [2019-10-13 20:08:39,024 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:39,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:08:39,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629820449] [2019-10-13 20:08:39,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:39,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:39,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:39,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:08:39,028 INFO L87 Difference]: Start difference. First operand 700 states and 1110 transitions. Second operand 5 states. [2019-10-13 20:08:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:42,701 INFO L93 Difference]: Finished difference Result 2057 states and 3297 transitions. [2019-10-13 20:08:42,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:42,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2019-10-13 20:08:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:42,716 INFO L225 Difference]: With dead ends: 2057 [2019-10-13 20:08:42,717 INFO L226 Difference]: Without dead ends: 1363 [2019-10-13 20:08:42,720 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 20:08:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-10-13 20:08:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1333. [2019-10-13 20:08:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-10-13 20:08:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1846 transitions. [2019-10-13 20:08:42,803 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1846 transitions. Word has length 100 [2019-10-13 20:08:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:42,804 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 1846 transitions. [2019-10-13 20:08:42,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1846 transitions. [2019-10-13 20:08:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 20:08:42,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:42,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:42,815 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash 278762691, now seen corresponding path program 1 times [2019-10-13 20:08:42,816 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:42,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573536563] [2019-10-13 20:08:42,818 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:42,818 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:42,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:43,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573536563] [2019-10-13 20:08:43,022 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:43,022 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:08:43,022 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500389141] [2019-10-13 20:08:43,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:43,023 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:43,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:08:43,024 INFO L87 Difference]: Start difference. First operand 1333 states and 1846 transitions. Second operand 5 states. [2019-10-13 20:08:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:48,789 INFO L93 Difference]: Finished difference Result 5790 states and 8308 transitions. [2019-10-13 20:08:48,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 20:08:48,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-10-13 20:08:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:48,814 INFO L225 Difference]: With dead ends: 5790 [2019-10-13 20:08:48,814 INFO L226 Difference]: Without dead ends: 4463 [2019-10-13 20:08:48,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:08:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2019-10-13 20:08:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4446. [2019-10-13 20:08:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4446 states. [2019-10-13 20:08:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 6041 transitions. [2019-10-13 20:08:48,944 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 6041 transitions. Word has length 108 [2019-10-13 20:08:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:48,945 INFO L462 AbstractCegarLoop]: Abstraction has 4446 states and 6041 transitions. [2019-10-13 20:08:48,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 6041 transitions. [2019-10-13 20:08:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 20:08:48,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:48,950 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:08:48,950 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:48,950 INFO L82 PathProgramCache]: Analyzing trace with hash -309550926, now seen corresponding path program 1 times [2019-10-13 20:08:48,951 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:48,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541855743] [2019-10-13 20:08:48,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:48,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:48,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 20:08:49,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541855743] [2019-10-13 20:08:49,133 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:49,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:49,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29663541] [2019-10-13 20:08:49,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:49,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:49,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:49,137 INFO L87 Difference]: Start difference. First operand 4446 states and 6041 transitions. Second operand 4 states. [2019-10-13 20:08:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:52,842 INFO L93 Difference]: Finished difference Result 16909 states and 23602 transitions. [2019-10-13 20:08:52,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:52,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-10-13 20:08:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:52,922 INFO L225 Difference]: With dead ends: 16909 [2019-10-13 20:08:52,923 INFO L226 Difference]: Without dead ends: 12469 [2019-10-13 20:08:52,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2019-10-13 20:08:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 10621. [2019-10-13 20:08:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10621 states. [2019-10-13 20:08:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10621 states to 10621 states and 14179 transitions. [2019-10-13 20:08:53,299 INFO L78 Accepts]: Start accepts. Automaton has 10621 states and 14179 transitions. Word has length 186 [2019-10-13 20:08:53,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:53,299 INFO L462 AbstractCegarLoop]: Abstraction has 10621 states and 14179 transitions. [2019-10-13 20:08:53,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10621 states and 14179 transitions. [2019-10-13 20:08:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2019-10-13 20:08:53,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:53,318 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:08:53,318 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1298691159, now seen corresponding path program 1 times [2019-10-13 20:08:53,319 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:53,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987784480] [2019-10-13 20:08:53,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:53,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:53,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-13 20:08:53,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987784480] [2019-10-13 20:08:53,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468447082] [2019-10-13 20:08:53,891 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 20:08:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:54,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 20:08:54,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-13 20:08:54,434 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-13 20:08:55,154 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:08:55,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-10-13 20:08:55,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051730568] [2019-10-13 20:08:55,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:55,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:55,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:08:55,157 INFO L87 Difference]: Start difference. First operand 10621 states and 14179 transitions. Second operand 4 states. [2019-10-13 20:08:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:58,489 INFO L93 Difference]: Finished difference Result 27457 states and 37957 transitions. [2019-10-13 20:08:58,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:58,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 421 [2019-10-13 20:08:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:58,661 INFO L225 Difference]: With dead ends: 27457 [2019-10-13 20:08:58,662 INFO L226 Difference]: Without dead ends: 16842 [2019-10-13 20:08:58,688 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:08:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16842 states. [2019-10-13 20:08:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16842 to 14377. [2019-10-13 20:08:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14377 states. [2019-10-13 20:08:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14377 states to 14377 states and 19561 transitions. [2019-10-13 20:08:59,101 INFO L78 Accepts]: Start accepts. Automaton has 14377 states and 19561 transitions. Word has length 421 [2019-10-13 20:08:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:59,103 INFO L462 AbstractCegarLoop]: Abstraction has 14377 states and 19561 transitions. [2019-10-13 20:08:59,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 14377 states and 19561 transitions. [2019-10-13 20:08:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2019-10-13 20:08:59,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:59,118 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:59,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:59,331 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:59,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1246734372, now seen corresponding path program 1 times [2019-10-13 20:08:59,333 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:59,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035207737] [2019-10-13 20:08:59,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:59,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:59,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 274 proven. 43 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 20:09:00,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035207737] [2019-10-13 20:09:00,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670695665] [2019-10-13 20:09:00,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:00,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 20:09:00,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:00,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:09:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-10-13 20:09:00,959 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:01,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:01,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:01,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:01,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:01,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:01,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:09:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 63 proven. 187 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-13 20:09:02,114 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:09:02,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2019-10-13 20:09:02,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180755311] [2019-10-13 20:09:02,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:09:02,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:09:02,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:09:02,119 INFO L87 Difference]: Start difference. First operand 14377 states and 19561 transitions. Second operand 5 states.