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/Problem02_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:55:35,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:55:35,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:55:35,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:55:35,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:55:35,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:55:35,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:55:35,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:55:35,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:55:35,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:55:35,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:55:35,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:55:35,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:55:35,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:55:35,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:55:35,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:55:35,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:55:35,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:55:35,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:55:35,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:55:35,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:55:35,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:55:35,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:55:35,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:55:35,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:55:35,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:55:35,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:55:35,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:55:35,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:55:35,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:55:35,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:55:35,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:55:35,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:55:35,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:55:35,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:55:35,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:55:35,836 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 [2019-10-14 23:55:35,861 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:35,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:35,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:35,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:35,863 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:35,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:35,863 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:35,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:35,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:35,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:35,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:35,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:35,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:35,868 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:35,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:35,868 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:35,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:35,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:35,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:35,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:35,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:35,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:35,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:35,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:35,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:35,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:35,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:35,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:35,872 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 [2019-10-14 23:55:36,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:36,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:36,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:36,173 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:36,173 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:36,174 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label08.c [2019-10-14 23:55:36,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efb1c687b/ffc5cf74f1b84e9c8976b9bea6bda90e/FLAGd793a64af [2019-10-14 23:55:36,748 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:36,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label08.c [2019-10-14 23:55:36,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efb1c687b/ffc5cf74f1b84e9c8976b9bea6bda90e/FLAGd793a64af [2019-10-14 23:55:37,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efb1c687b/ffc5cf74f1b84e9c8976b9bea6bda90e [2019-10-14 23:55:37,063 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:37,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:37,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:37,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:37,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:37,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be7d9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37, skipping insertion in model container [2019-10-14 23:55:37,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,081 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:37,131 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:37,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:37,658 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:37,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:37,774 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:37,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37 WrapperNode [2019-10-14 23:55:37,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:37,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:37,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:37,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:37,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (1/1) ... [2019-10-14 23:55:37,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:37,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:37,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:37,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:37,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (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 [2019-10-14 23:55:37,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:37,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:37,961 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:37,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:37,961 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:37,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:37,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:37,963 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:37,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:37,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:37,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:39,102 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:39,103 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:39,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:39 BoogieIcfgContainer [2019-10-14 23:55:39,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:39,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:39,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:39,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:39,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:37" (1/3) ... [2019-10-14 23:55:39,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed4cf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:39, skipping insertion in model container [2019-10-14 23:55:39,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:37" (2/3) ... [2019-10-14 23:55:39,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed4cf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:39, skipping insertion in model container [2019-10-14 23:55:39,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:39" (3/3) ... [2019-10-14 23:55:39,114 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label08.c [2019-10-14 23:55:39,125 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:39,133 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:39,145 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:39,174 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:39,174 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:39,175 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:39,175 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:39,175 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:39,176 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:39,176 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:39,176 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:55:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 23:55:39,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:39,217 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:39,219 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:39,226 INFO L82 PathProgramCache]: Analyzing trace with hash -218350154, now seen corresponding path program 1 times [2019-10-14 23:55:39,237 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:39,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458470512] [2019-10-14 23:55:39,238 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:39,238 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:39,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:39,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458470512] [2019-10-14 23:55:39,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:39,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:39,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076821162] [2019-10-14 23:55:39,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:39,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:39,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:39,781 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:55:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:40,632 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-10-14 23:55:40,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:40,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-10-14 23:55:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:40,665 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:55:40,665 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:55:40,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:55:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:55:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:55:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-10-14 23:55:40,769 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 128 [2019-10-14 23:55:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:40,770 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-10-14 23:55:40,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-10-14 23:55:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:55:40,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:40,776 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:55:40,776 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:40,777 INFO L82 PathProgramCache]: Analyzing trace with hash 206670545, now seen corresponding path program 1 times [2019-10-14 23:55:40,777 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:40,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501199570] [2019-10-14 23:55:40,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:40,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:40,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:41,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501199570] [2019-10-14 23:55:41,064 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:41,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:41,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553225016] [2019-10-14 23:55:41,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:41,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:41,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:41,067 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 5 states. [2019-10-14 23:55:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:41,731 INFO L93 Difference]: Finished difference Result 721 states and 1089 transitions. [2019-10-14 23:55:41,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:41,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2019-10-14 23:55:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:41,737 INFO L225 Difference]: With dead ends: 721 [2019-10-14 23:55:41,737 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:55:41,739 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:55:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:55:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:55:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 461 transitions. [2019-10-14 23:55:41,759 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 461 transitions. Word has length 136 [2019-10-14 23:55:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:41,760 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 461 transitions. [2019-10-14 23:55:41,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 461 transitions. [2019-10-14 23:55:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 23:55:41,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:41,764 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:41,764 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2140526213, now seen corresponding path program 1 times [2019-10-14 23:55:41,765 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:41,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048065777] [2019-10-14 23:55:41,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:41,766 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:41,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:42,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048065777] [2019-10-14 23:55:42,030 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:42,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:42,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751754589] [2019-10-14 23:55:42,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:42,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:42,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:42,032 INFO L87 Difference]: Start difference. First operand 320 states and 461 transitions. Second operand 5 states. [2019-10-14 23:55:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:42,744 INFO L93 Difference]: Finished difference Result 717 states and 1075 transitions. [2019-10-14 23:55:42,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:42,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2019-10-14 23:55:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:42,748 INFO L225 Difference]: With dead ends: 717 [2019-10-14 23:55:42,749 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:55:42,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:55:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:55:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:55:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 455 transitions. [2019-10-14 23:55:42,767 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 455 transitions. Word has length 142 [2019-10-14 23:55:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:42,767 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 455 transitions. [2019-10-14 23:55:42,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 455 transitions. [2019-10-14 23:55:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 23:55:42,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:42,774 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:42,775 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash 507332814, now seen corresponding path program 1 times [2019-10-14 23:55:42,775 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:42,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539892836] [2019-10-14 23:55:42,776 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:42,776 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:42,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:42,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539892836] [2019-10-14 23:55:42,869 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:42,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:42,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408644410] [2019-10-14 23:55:42,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:42,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:42,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:42,871 INFO L87 Difference]: Start difference. First operand 320 states and 455 transitions. Second operand 6 states. [2019-10-14 23:55:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:43,624 INFO L93 Difference]: Finished difference Result 951 states and 1383 transitions. [2019-10-14 23:55:43,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:43,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-14 23:55:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:43,629 INFO L225 Difference]: With dead ends: 951 [2019-10-14 23:55:43,629 INFO L226 Difference]: Without dead ends: 637 [2019-10-14 23:55:43,631 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 [2019-10-14 23:55:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2019-10-14 23:55:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 626. [2019-10-14 23:55:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 23:55:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 871 transitions. [2019-10-14 23:55:43,682 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 871 transitions. Word has length 150 [2019-10-14 23:55:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:43,682 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 871 transitions. [2019-10-14 23:55:43,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 871 transitions. [2019-10-14 23:55:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:55:43,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:43,687 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:43,688 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash 842155530, now seen corresponding path program 1 times [2019-10-14 23:55:43,688 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:43,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828750936] [2019-10-14 23:55:43,689 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:43,689 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:43,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:43,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828750936] [2019-10-14 23:55:43,948 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:43,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:43,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911278554] [2019-10-14 23:55:43,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:43,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:43,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:43,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:43,950 INFO L87 Difference]: Start difference. First operand 626 states and 871 transitions. Second operand 5 states. [2019-10-14 23:55:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:44,609 INFO L93 Difference]: Finished difference Result 1330 states and 1903 transitions. [2019-10-14 23:55:44,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:44,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2019-10-14 23:55:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:44,614 INFO L225 Difference]: With dead ends: 1330 [2019-10-14 23:55:44,614 INFO L226 Difference]: Without dead ends: 626 [2019-10-14 23:55:44,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-14 23:55:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-14 23:55:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 23:55:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 859 transitions. [2019-10-14 23:55:44,646 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 859 transitions. Word has length 152 [2019-10-14 23:55:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:44,646 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 859 transitions. [2019-10-14 23:55:44,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 859 transitions. [2019-10-14 23:55:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:55:44,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:44,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:44,651 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1322550086, now seen corresponding path program 1 times [2019-10-14 23:55:44,652 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:44,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566352763] [2019-10-14 23:55:44,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:44,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:44,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:44,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566352763] [2019-10-14 23:55:44,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:44,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:44,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954147094] [2019-10-14 23:55:44,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:44,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:44,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:44,907 INFO L87 Difference]: Start difference. First operand 626 states and 859 transitions. Second operand 5 states. [2019-10-14 23:55:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:45,526 INFO L93 Difference]: Finished difference Result 1332 states and 1878 transitions. [2019-10-14 23:55:45,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:45,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-14 23:55:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:45,531 INFO L225 Difference]: With dead ends: 1332 [2019-10-14 23:55:45,531 INFO L226 Difference]: Without dead ends: 626 [2019-10-14 23:55:45,533 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-14 23:55:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-14 23:55:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 23:55:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 843 transitions. [2019-10-14 23:55:45,553 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 843 transitions. Word has length 154 [2019-10-14 23:55:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:45,554 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 843 transitions. [2019-10-14 23:55:45,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 843 transitions. [2019-10-14 23:55:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 23:55:45,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:45,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:45,558 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash 484490686, now seen corresponding path program 1 times [2019-10-14 23:55:45,558 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:45,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527113890] [2019-10-14 23:55:45,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:45,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:45,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:45,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527113890] [2019-10-14 23:55:45,636 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:45,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:45,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834910923] [2019-10-14 23:55:45,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:45,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:45,638 INFO L87 Difference]: Start difference. First operand 626 states and 843 transitions. Second operand 6 states. [2019-10-14 23:55:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:46,413 INFO L93 Difference]: Finished difference Result 1858 states and 2601 transitions. [2019-10-14 23:55:46,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:46,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-10-14 23:55:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:46,421 INFO L225 Difference]: With dead ends: 1858 [2019-10-14 23:55:46,421 INFO L226 Difference]: Without dead ends: 1238 [2019-10-14 23:55:46,423 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 [2019-10-14 23:55:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-10-14 23:55:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1218. [2019-10-14 23:55:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2019-10-14 23:55:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1637 transitions. [2019-10-14 23:55:46,461 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1637 transitions. Word has length 158 [2019-10-14 23:55:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:46,462 INFO L462 AbstractCegarLoop]: Abstraction has 1218 states and 1637 transitions. [2019-10-14 23:55:46,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1637 transitions. [2019-10-14 23:55:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 23:55:46,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:46,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:46,467 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:46,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1847232649, now seen corresponding path program 1 times [2019-10-14 23:55:46,468 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:46,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793342553] [2019-10-14 23:55:46,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:46,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:46,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:46,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793342553] [2019-10-14 23:55:46,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855804504] [2019-10-14 23:55:46,595 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 [2019-10-14 23:55:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:46,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:46,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:55:46,908 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:55:47,026 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:55:47,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-14 23:55:47,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276078246] [2019-10-14 23:55:47,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:47,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:47,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:47,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:55:47,029 INFO L87 Difference]: Start difference. First operand 1218 states and 1637 transitions. Second operand 3 states. [2019-10-14 23:55:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:47,689 INFO L93 Difference]: Finished difference Result 2869 states and 3879 transitions. [2019-10-14 23:55:47,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:47,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2019-10-14 23:55:47,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:47,703 INFO L225 Difference]: With dead ends: 2869 [2019-10-14 23:55:47,703 INFO L226 Difference]: Without dead ends: 1657 [2019-10-14 23:55:47,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:55:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2019-10-14 23:55:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1654. [2019-10-14 23:55:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1654 states. [2019-10-14 23:55:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2171 transitions. [2019-10-14 23:55:47,768 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2171 transitions. Word has length 163 [2019-10-14 23:55:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:47,770 INFO L462 AbstractCegarLoop]: Abstraction has 1654 states and 2171 transitions. [2019-10-14 23:55:47,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2171 transitions. [2019-10-14 23:55:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-14 23:55:47,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:47,778 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:47,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:55:47,985 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 205637892, now seen corresponding path program 1 times [2019-10-14 23:55:47,986 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:47,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924981971] [2019-10-14 23:55:47,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:47,989 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:47,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 123 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:48,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924981971] [2019-10-14 23:55:48,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21913288] [2019-10-14 23:55:48,290 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 [2019-10-14 23:55:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:48,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:48,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:55:48,579 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:55:48,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1009279887] [2019-10-14 23:55:48,795 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 241 [2019-10-14 23:55:48,895 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:48,896 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)