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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:06,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:06,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:06,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:06,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:06,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:06,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:06,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:06,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:06,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:06,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:06,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:06,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:06,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:06,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:06,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:06,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:06,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:06,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:06,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:06,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:06,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:06,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:06,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:06,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:05:06,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:05:06,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:05:06,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:05:06,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:05:06,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:05:06,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:06,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:06,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:06,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:06,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:06,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:06,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:06,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:06,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:06,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:06,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:06,190 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 20:05:06,223 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:06,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:06,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:06,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:06,225 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:06,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:06,225 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:06,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:06,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:06,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:06,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:06,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:06,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:06,227 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:06,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:06,227 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:06,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:06,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:06,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:06,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:06,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:06,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:06,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:06,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:06,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:06,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:06,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:06,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:06,230 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 20:05:06,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:06,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:06,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:06,534 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:06,535 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:06,535 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-10-13 20:05:06,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/609b0808e/7210be27134e451f9851bf757a3836fe/FLAG18e5a07f4 [2019-10-13 20:05:07,233 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:07,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-10-13 20:05:07,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/609b0808e/7210be27134e451f9851bf757a3836fe/FLAG18e5a07f4 [2019-10-13 20:05:07,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/609b0808e/7210be27134e451f9851bf757a3836fe [2019-10-13 20:05:07,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:07,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:07,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:07,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:07,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:07,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:07" (1/1) ... [2019-10-13 20:05:07,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b6da4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:07, skipping insertion in model container [2019-10-13 20:05:07,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:07" (1/1) ... [2019-10-13 20:05:07,481 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:07,549 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:08,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:08,316 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:08,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:08,654 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:08,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08 WrapperNode [2019-10-13 20:05:08,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:08,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:08,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:08,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:08,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (1/1) ... [2019-10-13 20:05:08,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:08,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:08,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:08,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:08,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (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 20:05:08,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:08,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:08,920 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:08,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:10,936 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:10,936 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:10,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:10 BoogieIcfgContainer [2019-10-13 20:05:10,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:10,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:10,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:10,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:10,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:07" (1/3) ... [2019-10-13 20:05:10,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bde01c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:10, skipping insertion in model container [2019-10-13 20:05:10,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:08" (2/3) ... [2019-10-13 20:05:10,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bde01c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:10, skipping insertion in model container [2019-10-13 20:05:10,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:10" (3/3) ... [2019-10-13 20:05:10,948 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label51.c [2019-10-13 20:05:10,960 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:10,972 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:10,986 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:11,030 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:11,030 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:11,031 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:11,031 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:11,031 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:11,031 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:11,031 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:11,032 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:05:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 20:05:11,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:11,072 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:11,074 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash 234227266, now seen corresponding path program 1 times [2019-10-13 20:05:11,088 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:11,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400690498] [2019-10-13 20:05:11,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:11,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:11,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:11,350 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 20:05:11,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400690498] [2019-10-13 20:05:11,352 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:11,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:11,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256122578] [2019-10-13 20:05:11,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:11,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:11,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:11,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:11,379 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:05:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:13,627 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-10-13 20:05:13,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:13,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-13 20:05:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:13,652 INFO L225 Difference]: With dead ends: 975 [2019-10-13 20:05:13,653 INFO L226 Difference]: Without dead ends: 616 [2019-10-13 20:05:13,663 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 20:05:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-13 20:05:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-10-13 20:05:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-13 20:05:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-10-13 20:05:13,762 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 17 [2019-10-13 20:05:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:13,762 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-10-13 20:05:13,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-10-13 20:05:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 20:05:13,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:13,769 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:05:13,769 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash -904309470, now seen corresponding path program 1 times [2019-10-13 20:05:13,770 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:13,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952600955] [2019-10-13 20:05:13,770 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:13,771 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:13,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:14,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952600955] [2019-10-13 20:05:14,038 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:14,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:14,038 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996475430] [2019-10-13 20:05:14,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:14,045 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:14,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:14,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:14,046 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-10-13 20:05:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:15,610 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-10-13 20:05:15,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:15,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-10-13 20:05:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:15,620 INFO L225 Difference]: With dead ends: 1241 [2019-10-13 20:05:15,620 INFO L226 Difference]: Without dead ends: 825 [2019-10-13 20:05:15,622 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 20:05:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-10-13 20:05:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-10-13 20:05:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-13 20:05:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-10-13 20:05:15,666 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 89 [2019-10-13 20:05:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:15,666 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-10-13 20:05:15,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-10-13 20:05:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 20:05:15,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:15,670 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:05:15,671 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:15,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1264359761, now seen corresponding path program 1 times [2019-10-13 20:05:15,671 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:15,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103734959] [2019-10-13 20:05:15,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:15,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:15,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:15,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103734959] [2019-10-13 20:05:15,762 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:15,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:15,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329554007] [2019-10-13 20:05:15,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:15,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:15,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:15,764 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 4 states. [2019-10-13 20:05:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:17,508 INFO L93 Difference]: Finished difference Result 2405 states and 3484 transitions. [2019-10-13 20:05:17,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:17,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-10-13 20:05:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:17,521 INFO L225 Difference]: With dead ends: 2405 [2019-10-13 20:05:17,521 INFO L226 Difference]: Without dead ends: 1597 [2019-10-13 20:05:17,525 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 20:05:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2019-10-13 20:05:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1394. [2019-10-13 20:05:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2019-10-13 20:05:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1952 transitions. [2019-10-13 20:05:17,583 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1952 transitions. Word has length 90 [2019-10-13 20:05:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:17,584 INFO L462 AbstractCegarLoop]: Abstraction has 1394 states and 1952 transitions. [2019-10-13 20:05:17,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1952 transitions. [2019-10-13 20:05:17,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 20:05:17,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:17,588 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:05:17,588 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:17,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1508869126, now seen corresponding path program 1 times [2019-10-13 20:05:17,589 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:17,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205844749] [2019-10-13 20:05:17,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:17,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:17,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:17,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205844749] [2019-10-13 20:05:17,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:17,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:05:17,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888202567] [2019-10-13 20:05:17,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:17,759 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:17,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:17,760 INFO L87 Difference]: Start difference. First operand 1394 states and 1952 transitions. Second operand 3 states. [2019-10-13 20:05:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:18,762 INFO L93 Difference]: Finished difference Result 3547 states and 5155 transitions. [2019-10-13 20:05:18,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:18,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2019-10-13 20:05:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:18,776 INFO L225 Difference]: With dead ends: 3547 [2019-10-13 20:05:18,776 INFO L226 Difference]: Without dead ends: 2159 [2019-10-13 20:05:18,781 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 20:05:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2019-10-13 20:05:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2159. [2019-10-13 20:05:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2019-10-13 20:05:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3043 transitions. [2019-10-13 20:05:18,845 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3043 transitions. Word has length 91 [2019-10-13 20:05:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:18,845 INFO L462 AbstractCegarLoop]: Abstraction has 2159 states and 3043 transitions. [2019-10-13 20:05:18,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3043 transitions. [2019-10-13 20:05:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 20:05:18,851 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:18,851 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:18,851 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash -727591200, now seen corresponding path program 1 times [2019-10-13 20:05:18,852 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:18,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351907348] [2019-10-13 20:05:18,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:18,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:18,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:19,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351907348] [2019-10-13 20:05:19,110 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:19,110 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:19,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337927221] [2019-10-13 20:05:19,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:19,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:19,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:19,114 INFO L87 Difference]: Start difference. First operand 2159 states and 3043 transitions. Second operand 6 states. [2019-10-13 20:05:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:21,058 INFO L93 Difference]: Finished difference Result 5916 states and 8671 transitions. [2019-10-13 20:05:21,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 20:05:21,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-10-13 20:05:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:21,082 INFO L225 Difference]: With dead ends: 5916 [2019-10-13 20:05:21,083 INFO L226 Difference]: Without dead ends: 3763 [2019-10-13 20:05:21,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:05:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2019-10-13 20:05:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3561. [2019-10-13 20:05:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3561 states. [2019-10-13 20:05:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 4916 transitions. [2019-10-13 20:05:21,199 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 4916 transitions. Word has length 160 [2019-10-13 20:05:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:21,199 INFO L462 AbstractCegarLoop]: Abstraction has 3561 states and 4916 transitions. [2019-10-13 20:05:21,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 4916 transitions. [2019-10-13 20:05:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 20:05:21,203 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:21,203 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 20:05:21,204 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1639919989, now seen corresponding path program 1 times [2019-10-13 20:05:21,204 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:21,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148478575] [2019-10-13 20:05:21,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:21,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:21,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:21,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148478575] [2019-10-13 20:05:21,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845200546] [2019-10-13 20:05:21,374 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 20:05:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:21,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:05:21,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:05:21,609 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:05:21,731 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:05:21,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-13 20:05:21,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928092652] [2019-10-13 20:05:21,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:21,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:05:21,734 INFO L87 Difference]: Start difference. First operand 3561 states and 4916 transitions. Second operand 3 states. [2019-10-13 20:05:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:23,005 INFO L93 Difference]: Finished difference Result 9593 states and 13716 transitions. [2019-10-13 20:05:23,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:23,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 180 [2019-10-13 20:05:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:23,045 INFO L225 Difference]: With dead ends: 9593 [2019-10-13 20:05:23,046 INFO L226 Difference]: Without dead ends: 6038 [2019-10-13 20:05:23,059 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 359 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 20:05:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2019-10-13 20:05:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 5470. [2019-10-13 20:05:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5470 states. [2019-10-13 20:05:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 7617 transitions. [2019-10-13 20:05:23,249 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 7617 transitions. Word has length 180 [2019-10-13 20:05:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:23,250 INFO L462 AbstractCegarLoop]: Abstraction has 5470 states and 7617 transitions. [2019-10-13 20:05:23,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 7617 transitions. [2019-10-13 20:05:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-13 20:05:23,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:23,257 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:23,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:23,462 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:23,463 INFO L82 PathProgramCache]: Analyzing trace with hash 185402300, now seen corresponding path program 1 times [2019-10-13 20:05:23,463 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:23,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343074558] [2019-10-13 20:05:23,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:23,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:23,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:23,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343074558] [2019-10-13 20:05:23,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111728253] [2019-10-13 20:05:23,728 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 20:05:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:23,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:05:23,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:23,886 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:23,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [815746263] [2019-10-13 20:05:23,993 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 197 [2019-10-13 20:05:24,061 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:05:24,062 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)