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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:00,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:00,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:00,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:00,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:00,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:00,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:00,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:00,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:00,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:00,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:00,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:00,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:00,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:00,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:00,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:00,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:00,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:00,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:00,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:00,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:00,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:00,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:00,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:00,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:00,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:00,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:00,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:00,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:00,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:00,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:00,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:00,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:00,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:00,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:00,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:00,170 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 20:11:00,191 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:00,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:00,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:00,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:00,193 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:00,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:00,194 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:00,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:00,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:00,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:00,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:00,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:00,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:00,195 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:00,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:00,195 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:00,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:00,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:00,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:00,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:00,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:00,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:00,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:00,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:00,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:00,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:00,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:00,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:00,198 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 20:11:00,476 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:00,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:00,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:00,496 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:00,498 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:00,499 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label22.c [2019-10-13 20:11:00,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2caf3b43f/00fd01c5d6cd48e9bfbeb57ce3dbc4d9/FLAG463860a04 [2019-10-13 20:11:01,270 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:01,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label22.c [2019-10-13 20:11:01,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2caf3b43f/00fd01c5d6cd48e9bfbeb57ce3dbc4d9/FLAG463860a04 [2019-10-13 20:11:01,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2caf3b43f/00fd01c5d6cd48e9bfbeb57ce3dbc4d9 [2019-10-13 20:11:01,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:01,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:01,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:01,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:01,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:01,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:01" (1/1) ... [2019-10-13 20:11:01,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:01, skipping insertion in model container [2019-10-13 20:11:01,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:01" (1/1) ... [2019-10-13 20:11:01,473 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:01,594 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:02,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:02,918 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:03,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:03,383 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:03,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03 WrapperNode [2019-10-13 20:11:03,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:03,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:03,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:03,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:03,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (1/1) ... [2019-10-13 20:11:03,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (1/1) ... [2019-10-13 20:11:03,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (1/1) ... [2019-10-13 20:11:03,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (1/1) ... [2019-10-13 20:11:03,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (1/1) ... [2019-10-13 20:11:03,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (1/1) ... [2019-10-13 20:11:03,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (1/1) ... [2019-10-13 20:11:03,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:03,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:03,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:03,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:03,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (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 20:11:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:03,714 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:03,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:03,715 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:03,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:03,717 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:03,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:07,469 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:07,469 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:07,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:07 BoogieIcfgContainer [2019-10-13 20:11:07,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:07,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:07,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:07,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:07,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:01" (1/3) ... [2019-10-13 20:11:07,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69589446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:07, skipping insertion in model container [2019-10-13 20:11:07,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:03" (2/3) ... [2019-10-13 20:11:07,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69589446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:07, skipping insertion in model container [2019-10-13 20:11:07,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:07" (3/3) ... [2019-10-13 20:11:07,486 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label22.c [2019-10-13 20:11:07,497 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:07,509 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:07,520 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:07,563 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:07,563 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:07,564 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:07,564 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:07,564 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:07,565 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:07,565 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:07,566 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 20:11:07,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:07,618 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] [2019-10-13 20:11:07,620 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash -864903206, now seen corresponding path program 1 times [2019-10-13 20:11:07,635 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:07,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683720249] [2019-10-13 20:11:07,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:07,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:07,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:07,926 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 20:11:07,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683720249] [2019-10-13 20:11:07,928 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:07,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:07,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114731607] [2019-10-13 20:11:07,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:07,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:07,959 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:12,293 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:12,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:12,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2019-10-13 20:11:12,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:12,327 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:12,327 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:12,336 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 20:11:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-10-13 20:11:12,469 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 47 [2019-10-13 20:11:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:12,470 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-10-13 20:11:12,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-10-13 20:11:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 20:11:12,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:12,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:12,481 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1267579837, now seen corresponding path program 1 times [2019-10-13 20:11:12,482 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:12,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875547435] [2019-10-13 20:11:12,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:12,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:12,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:12,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875547435] [2019-10-13 20:11:12,692 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:12,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:11:12,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917932258] [2019-10-13 20:11:12,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:12,695 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:12,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:11:12,697 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-10-13 20:11:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:18,084 INFO L93 Difference]: Finished difference Result 3572 states and 6416 transitions. [2019-10-13 20:11:18,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:18,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-10-13 20:11:18,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:18,098 INFO L225 Difference]: With dead ends: 3572 [2019-10-13 20:11:18,099 INFO L226 Difference]: Without dead ends: 2166 [2019-10-13 20:11:18,103 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 20:11:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-10-13 20:11:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-10-13 20:11:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-10-13 20:11:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-10-13 20:11:18,173 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 118 [2019-10-13 20:11:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:18,176 INFO L462 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-10-13 20:11:18,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:11:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-10-13 20:11:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:11:18,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:18,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:18,188 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1213598126, now seen corresponding path program 1 times [2019-10-13 20:11:18,189 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:18,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609234141] [2019-10-13 20:11:18,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:18,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:18,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:18,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609234141] [2019-10-13 20:11:18,417 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:18,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:18,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777523634] [2019-10-13 20:11:18,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:18,419 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:18,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:18,419 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-10-13 20:11:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:23,271 INFO L93 Difference]: Finished difference Result 5051 states and 8506 transitions. [2019-10-13 20:11:23,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:23,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-13 20:11:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:23,287 INFO L225 Difference]: With dead ends: 5051 [2019-10-13 20:11:23,287 INFO L226 Difference]: Without dead ends: 2911 [2019-10-13 20:11:23,292 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 20:11:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-10-13 20:11:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-10-13 20:11:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-10-13 20:11:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-10-13 20:11:23,357 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 141 [2019-10-13 20:11:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:23,358 INFO L462 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-10-13 20:11:23,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-10-13 20:11:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 20:11:23,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:23,361 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:23,361 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:23,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1078405386, now seen corresponding path program 1 times [2019-10-13 20:11:23,362 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:23,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659987647] [2019-10-13 20:11:23,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:23,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:23,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:23,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659987647] [2019-10-13 20:11:23,487 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:23,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:23,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294992448] [2019-10-13 20:11:23,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:23,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:23,489 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-10-13 20:11:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:27,953 INFO L93 Difference]: Finished difference Result 6543 states and 10148 transitions. [2019-10-13 20:11:27,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:27,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-13 20:11:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:27,969 INFO L225 Difference]: With dead ends: 6543 [2019-10-13 20:11:27,970 INFO L226 Difference]: Without dead ends: 3662 [2019-10-13 20:11:27,975 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 20:11:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-10-13 20:11:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-10-13 20:11:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-10-13 20:11:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-10-13 20:11:28,051 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 145 [2019-10-13 20:11:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:28,051 INFO L462 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-10-13 20:11:28,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-10-13 20:11:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 20:11:28,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:28,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:28,055 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1863725289, now seen corresponding path program 1 times [2019-10-13 20:11:28,056 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:28,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42482809] [2019-10-13 20:11:28,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:28,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:28,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:28,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42482809] [2019-10-13 20:11:28,206 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:28,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:28,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798898395] [2019-10-13 20:11:28,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:28,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:28,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:28,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:28,208 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-10-13 20:11:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:33,014 INFO L93 Difference]: Finished difference Result 10404 states and 14982 transitions. [2019-10-13 20:11:33,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:33,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2019-10-13 20:11:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:33,044 INFO L225 Difference]: With dead ends: 10404 [2019-10-13 20:11:33,044 INFO L226 Difference]: Without dead ends: 6768 [2019-10-13 20:11:33,054 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 20:11:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-10-13 20:11:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-10-13 20:11:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-10-13 20:11:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-10-13 20:11:33,199 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 176 [2019-10-13 20:11:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:33,199 INFO L462 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-10-13 20:11:33,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-10-13 20:11:33,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-13 20:11:33,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:33,204 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, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:11:33,204 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1485271607, now seen corresponding path program 1 times [2019-10-13 20:11:33,205 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:33,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710879648] [2019-10-13 20:11:33,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:33,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:33,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:33,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710879648] [2019-10-13 20:11:33,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32539137] [2019-10-13 20:11:33,338 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 20:11:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:33,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:11:33,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 20:11:33,633 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:11:33,807 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:11:33,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-13 20:11:33,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834031383] [2019-10-13 20:11:33,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:33,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:33,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:33,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:33,813 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 5 states.