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/Problem11_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:04:21,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:04:21,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:04:21,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:04:21,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:04:21,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:04:21,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:04:21,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:04:21,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:04:21,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:04:21,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:04:21,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:04:21,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:04:21,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:04:21,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:04:21,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:04:21,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:04:21,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:04:21,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:04:21,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:04:21,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:04:21,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:04:21,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:04:21,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:04:21,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:04:21,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:04:21,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:04:21,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:04:21,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:04:21,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:04:21,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:04:21,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:04:21,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:04:21,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:04:21,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:04:21,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:04:21,203 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 20:04:21,222 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:04:21,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:04:21,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:04:21,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:04:21,226 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:04:21,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:04:21,226 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:04:21,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:04:21,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:04:21,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:04:21,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:04:21,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:04:21,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:04:21,229 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:04:21,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:04:21,229 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:04:21,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:04:21,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:04:21,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:04:21,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:04:21,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:04:21,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:21,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:04:21,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:04:21,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:04:21,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:04:21,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:04:21,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:04:21,232 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 20:04:21,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:04:21,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:04:21,547 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:04:21,549 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:04:21,549 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:04:21,550 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label27.c [2019-10-13 20:04:21,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13866e2ae/f67135c9c1974a2fbede6d7db1914cdf/FLAGd3ea584cc [2019-10-13 20:04:22,306 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:04:22,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label27.c [2019-10-13 20:04:22,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13866e2ae/f67135c9c1974a2fbede6d7db1914cdf/FLAGd3ea584cc [2019-10-13 20:04:22,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13866e2ae/f67135c9c1974a2fbede6d7db1914cdf [2019-10-13 20:04:22,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:04:22,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:04:22,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:22,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:04:22,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:04:22,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:22" (1/1) ... [2019-10-13 20:04:22,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c786d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:22, skipping insertion in model container [2019-10-13 20:04:22,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:22" (1/1) ... [2019-10-13 20:04:22,596 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:04:22,668 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:04:23,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:23,381 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:04:23,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:23,632 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:04:23,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23 WrapperNode [2019-10-13 20:04:23,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:23,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:04:23,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:04:23,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:04:23,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (1/1) ... [2019-10-13 20:04:23,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (1/1) ... [2019-10-13 20:04:23,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (1/1) ... [2019-10-13 20:04:23,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (1/1) ... [2019-10-13 20:04:23,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (1/1) ... [2019-10-13 20:04:23,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (1/1) ... [2019-10-13 20:04:23,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (1/1) ... [2019-10-13 20:04:23,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:04:23,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:04:23,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:04:23,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:04:23,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (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 20:04:23,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:04:23,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:04:23,875 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:04:23,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:04:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:04:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:04:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:04:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:04:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:04:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:04:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:04:25,810 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:04:25,811 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:04:25,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:25 BoogieIcfgContainer [2019-10-13 20:04:25,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:04:25,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:04:25,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:04:25,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:04:25,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:22" (1/3) ... [2019-10-13 20:04:25,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6616f025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:25, skipping insertion in model container [2019-10-13 20:04:25,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:23" (2/3) ... [2019-10-13 20:04:25,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6616f025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:25, skipping insertion in model container [2019-10-13 20:04:25,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:25" (3/3) ... [2019-10-13 20:04:25,836 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label27.c [2019-10-13 20:04:25,848 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:04:25,859 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:04:25,871 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:04:25,939 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:04:25,939 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:04:25,941 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:04:25,941 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:04:25,941 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:04:25,941 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:04:25,941 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:04:25,941 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:04:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:04:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 20:04:25,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:25,989 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:04:25,991 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1647483275, now seen corresponding path program 1 times [2019-10-13 20:04:26,007 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:26,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371060391] [2019-10-13 20:04:26,008 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:26,008 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:26,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:26,414 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 20:04:26,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371060391] [2019-10-13 20:04:26,417 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:26,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:04:26,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095794744] [2019-10-13 20:04:26,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:26,425 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:26,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:26,444 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:04:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:28,831 INFO L93 Difference]: Finished difference Result 992 states and 1772 transitions. [2019-10-13 20:04:28,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:28,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-10-13 20:04:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:28,869 INFO L225 Difference]: With dead ends: 992 [2019-10-13 20:04:28,870 INFO L226 Difference]: Without dead ends: 618 [2019-10-13 20:04:28,882 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 20:04:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-10-13 20:04:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 419. [2019-10-13 20:04:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-13 20:04:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 604 transitions. [2019-10-13 20:04:29,024 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 604 transitions. Word has length 48 [2019-10-13 20:04:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:29,025 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 604 transitions. [2019-10-13 20:04:29,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 604 transitions. [2019-10-13 20:04:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 20:04:29,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:29,031 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:29,031 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2032953802, now seen corresponding path program 1 times [2019-10-13 20:04:29,032 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:29,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969380270] [2019-10-13 20:04:29,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:29,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:29,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:29,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969380270] [2019-10-13 20:04:29,224 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:29,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:04:29,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524413562] [2019-10-13 20:04:29,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:04:29,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:29,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:04:29,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:04:29,233 INFO L87 Difference]: Start difference. First operand 419 states and 604 transitions. Second operand 6 states. [2019-10-13 20:04:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:30,779 INFO L93 Difference]: Finished difference Result 1236 states and 1811 transitions. [2019-10-13 20:04:30,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:30,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-10-13 20:04:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:30,787 INFO L225 Difference]: With dead ends: 1236 [2019-10-13 20:04:30,787 INFO L226 Difference]: Without dead ends: 823 [2019-10-13 20:04:30,789 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 20:04:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2019-10-13 20:04:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 808. [2019-10-13 20:04:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2019-10-13 20:04:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1155 transitions. [2019-10-13 20:04:30,834 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1155 transitions. Word has length 120 [2019-10-13 20:04:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:30,835 INFO L462 AbstractCegarLoop]: Abstraction has 808 states and 1155 transitions. [2019-10-13 20:04:30,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:04:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1155 transitions. [2019-10-13 20:04:30,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 20:04:30,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:30,838 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:30,839 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:30,839 INFO L82 PathProgramCache]: Analyzing trace with hash 664653149, now seen corresponding path program 1 times [2019-10-13 20:04:30,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:30,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292562568] [2019-10-13 20:04:30,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:30,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:30,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:30,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292562568] [2019-10-13 20:04:30,984 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:30,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:04:30,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121277710] [2019-10-13 20:04:30,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:30,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:30,988 INFO L87 Difference]: Start difference. First operand 808 states and 1155 transitions. Second operand 4 states. [2019-10-13 20:04:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:32,780 INFO L93 Difference]: Finished difference Result 2390 states and 3458 transitions. [2019-10-13 20:04:32,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:32,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-10-13 20:04:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:32,790 INFO L225 Difference]: With dead ends: 2390 [2019-10-13 20:04:32,790 INFO L226 Difference]: Without dead ends: 1588 [2019-10-13 20:04:32,793 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 20:04:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2019-10-13 20:04:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1382. [2019-10-13 20:04:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1382 states. [2019-10-13 20:04:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 1925 transitions. [2019-10-13 20:04:32,836 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 1925 transitions. Word has length 121 [2019-10-13 20:04:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:32,837 INFO L462 AbstractCegarLoop]: Abstraction has 1382 states and 1925 transitions. [2019-10-13 20:04:32,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 1925 transitions. [2019-10-13 20:04:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 20:04:32,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:32,841 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:32,841 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:32,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1062949639, now seen corresponding path program 1 times [2019-10-13 20:04:32,842 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:32,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696710288] [2019-10-13 20:04:32,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:32,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:32,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:32,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696710288] [2019-10-13 20:04:32,999 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:32,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:04:32,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451362254] [2019-10-13 20:04:33,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:04:33,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:33,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:04:33,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:04:33,001 INFO L87 Difference]: Start difference. First operand 1382 states and 1925 transitions. Second operand 5 states. [2019-10-13 20:04:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:34,735 INFO L93 Difference]: Finished difference Result 3988 states and 5881 transitions. [2019-10-13 20:04:34,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:04:34,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2019-10-13 20:04:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:34,754 INFO L225 Difference]: With dead ends: 3988 [2019-10-13 20:04:34,754 INFO L226 Difference]: Without dead ends: 2612 [2019-10-13 20:04:34,759 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 20:04:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2019-10-13 20:04:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2572. [2019-10-13 20:04:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2572 states. [2019-10-13 20:04:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3448 transitions. [2019-10-13 20:04:34,868 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3448 transitions. Word has length 123 [2019-10-13 20:04:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:34,869 INFO L462 AbstractCegarLoop]: Abstraction has 2572 states and 3448 transitions. [2019-10-13 20:04:34,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:04:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3448 transitions. [2019-10-13 20:04:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 20:04:34,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:34,876 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:34,876 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash 669937364, now seen corresponding path program 1 times [2019-10-13 20:04:34,877 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:34,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648713305] [2019-10-13 20:04:34,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:34,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:34,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:35,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648713305] [2019-10-13 20:04:35,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367403762] [2019-10-13 20:04:35,196 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 20:04:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:35,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:04:35,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:35,413 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:35,487 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:04:35,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-13 20:04:35,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742460290] [2019-10-13 20:04:35,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:35,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:04:35,489 INFO L87 Difference]: Start difference. First operand 2572 states and 3448 transitions. Second operand 3 states. [2019-10-13 20:04:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:36,704 INFO L93 Difference]: Finished difference Result 6311 states and 8689 transitions. [2019-10-13 20:04:36,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:36,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2019-10-13 20:04:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:36,725 INFO L225 Difference]: With dead ends: 6311 [2019-10-13 20:04:36,725 INFO L226 Difference]: Without dead ends: 3745 [2019-10-13 20:04:36,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:04:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2019-10-13 20:04:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3742. [2019-10-13 20:04:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3742 states. [2019-10-13 20:04:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 5043 transitions. [2019-10-13 20:04:36,849 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 5043 transitions. Word has length 179 [2019-10-13 20:04:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:36,850 INFO L462 AbstractCegarLoop]: Abstraction has 3742 states and 5043 transitions. [2019-10-13 20:04:36,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:36,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 5043 transitions. [2019-10-13 20:04:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-13 20:04:36,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:36,857 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:04:37,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:37,062 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:37,063 INFO L82 PathProgramCache]: Analyzing trace with hash -596928914, now seen corresponding path program 1 times [2019-10-13 20:04:37,063 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:37,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065737586] [2019-10-13 20:04:37,064 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:37,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:37,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:37,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065737586] [2019-10-13 20:04:37,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979037914] [2019-10-13 20:04:37,328 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 20:04:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:37,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:04:37,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 20:04:37,502 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 20:04:37,605 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:04:37,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-13 20:04:37,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758616390] [2019-10-13 20:04:37,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:37,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:37,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:37,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:04:37,607 INFO L87 Difference]: Start difference. First operand 3742 states and 5043 transitions. Second operand 3 states. [2019-10-13 20:04:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:38,733 INFO L93 Difference]: Finished difference Result 9576 states and 13285 transitions. [2019-10-13 20:04:38,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:38,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-10-13 20:04:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:38,767 INFO L225 Difference]: With dead ends: 9576 [2019-10-13 20:04:38,768 INFO L226 Difference]: Without dead ends: 5840 [2019-10-13 20:04:38,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 409 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:04:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2019-10-13 20:04:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 5652. [2019-10-13 20:04:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5652 states. [2019-10-13 20:04:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 7540 transitions. [2019-10-13 20:04:38,931 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 7540 transitions. Word has length 205 [2019-10-13 20:04:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:38,932 INFO L462 AbstractCegarLoop]: Abstraction has 5652 states and 7540 transitions. [2019-10-13 20:04:38,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 7540 transitions. [2019-10-13 20:04:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-13 20:04:38,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:38,940 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:04:39,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:39,146 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1919024346, now seen corresponding path program 1 times [2019-10-13 20:04:39,147 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:39,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264787334] [2019-10-13 20:04:39,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:39,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:39,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 20:04:39,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264787334] [2019-10-13 20:04:39,332 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:39,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:04:39,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496582824] [2019-10-13 20:04:39,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:39,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:39,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:39,334 INFO L87 Difference]: Start difference. First operand 5652 states and 7540 transitions. Second operand 3 states. [2019-10-13 20:04:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:40,362 INFO L93 Difference]: Finished difference Result 13766 states and 19030 transitions. [2019-10-13 20:04:40,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:40,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2019-10-13 20:04:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:40,401 INFO L225 Difference]: With dead ends: 13766 [2019-10-13 20:04:40,401 INFO L226 Difference]: Without dead ends: 8120 [2019-10-13 20:04:40,418 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 20:04:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2019-10-13 20:04:40,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 7744. [2019-10-13 20:04:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7744 states. [2019-10-13 20:04:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7744 states to 7744 states and 10330 transitions. [2019-10-13 20:04:40,621 INFO L78 Accepts]: Start accepts. Automaton has 7744 states and 10330 transitions. Word has length 209 [2019-10-13 20:04:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:40,622 INFO L462 AbstractCegarLoop]: Abstraction has 7744 states and 10330 transitions. [2019-10-13 20:04:40,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7744 states and 10330 transitions. [2019-10-13 20:04:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-10-13 20:04:40,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:40,635 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:04:40,636 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1121364656, now seen corresponding path program 1 times [2019-10-13 20:04:40,636 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:40,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308163938] [2019-10-13 20:04:40,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:40,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:40,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:40,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308163938] [2019-10-13 20:04:40,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888323303] [2019-10-13 20:04:40,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:41,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:04:41,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:41,154 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:41,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [391176677] [2019-10-13 20:04:41,294 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 246 [2019-10-13 20:04:41,365 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:04:41,365 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)