java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:19,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:19,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:19,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:19,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:19,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:19,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:19,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:19,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:19,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:19,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:19,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:19,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:19,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:19,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:19,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:19,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:19,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:19,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:19,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:19,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:19,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:19,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:19,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:19,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:19,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:10:19,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:10:19,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:10:19,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:10:19,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:10:19,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:10:19,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:10:19,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:10:19,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:19,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:19,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:19,157 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 [2019-10-15 00:10:19,191 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:19,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:19,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:19,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:19,194 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:19,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:19,194 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:19,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:19,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:19,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:19,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:19,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:19,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:19,196 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:19,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:19,196 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:19,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:19,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:19,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:19,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:19,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:19,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:19,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:19,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:19,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:19,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:19,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:19,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:19,199 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 [2019-10-15 00:10:19,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:19,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:19,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:19,501 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:19,501 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:19,502 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-10-15 00:10:19,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4cd9176/91fcf39c58ef4b6caf00bd2d9b754f9c/FLAG496a9df30 [2019-10-15 00:10:20,277 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:20,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-10-15 00:10:20,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4cd9176/91fcf39c58ef4b6caf00bd2d9b754f9c/FLAG496a9df30 [2019-10-15 00:10:20,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4cd9176/91fcf39c58ef4b6caf00bd2d9b754f9c [2019-10-15 00:10:20,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:20,456 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:20,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:20,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:20,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:20,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:20" (1/1) ... [2019-10-15 00:10:20,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bca6166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:20, skipping insertion in model container [2019-10-15 00:10:20,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:20" (1/1) ... [2019-10-15 00:10:20,478 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:20,597 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:21,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:21,804 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:22,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:22,270 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:22,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22 WrapperNode [2019-10-15 00:10:22,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:22,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:22,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:22,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:22,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (1/1) ... [2019-10-15 00:10:22,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (1/1) ... [2019-10-15 00:10:22,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (1/1) ... [2019-10-15 00:10:22,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (1/1) ... [2019-10-15 00:10:22,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (1/1) ... [2019-10-15 00:10:22,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (1/1) ... [2019-10-15 00:10:22,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (1/1) ... [2019-10-15 00:10:22,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:22,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:22,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:22,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:22,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (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 [2019-10-15 00:10:22,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:22,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:22,574 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:22,574 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:22,574 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:22,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:22,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:22,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:26,817 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:26,817 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:26,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:26 BoogieIcfgContainer [2019-10-15 00:10:26,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:26,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:26,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:26,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:26,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:20" (1/3) ... [2019-10-15 00:10:26,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214c8cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:26, skipping insertion in model container [2019-10-15 00:10:26,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:22" (2/3) ... [2019-10-15 00:10:26,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214c8cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:26, skipping insertion in model container [2019-10-15 00:10:26,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:26" (3/3) ... [2019-10-15 00:10:26,832 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label42.c [2019-10-15 00:10:26,844 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:26,857 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:26,868 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:26,902 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:26,902 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:26,903 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:26,903 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:26,903 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:26,903 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:26,903 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:26,903 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-15 00:10:26,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:26,948 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] [2019-10-15 00:10:26,950 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1002146950, now seen corresponding path program 1 times [2019-10-15 00:10:26,966 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:26,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556035966] [2019-10-15 00:10:26,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:26,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:26,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:27,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556035966] [2019-10-15 00:10:27,315 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:27,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:27,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140453408] [2019-10-15 00:10:27,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:27,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:27,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:27,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:27,341 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:32,180 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:32,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:32,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2019-10-15 00:10:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:32,226 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:32,226 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:32,242 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 [2019-10-15 00:10:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-15 00:10:32,430 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 55 [2019-10-15 00:10:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:32,432 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-15 00:10:32,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-15 00:10:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 00:10:32,447 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:32,447 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:32,448 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1421869466, now seen corresponding path program 1 times [2019-10-15 00:10:32,448 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:32,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366062346] [2019-10-15 00:10:32,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:32,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:32,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:32,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366062346] [2019-10-15 00:10:32,618 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:32,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:32,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218174156] [2019-10-15 00:10:32,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:32,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:32,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:32,621 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-15 00:10:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:38,001 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-15 00:10:38,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:38,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-15 00:10:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:38,027 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:38,028 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:38,032 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:38,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-15 00:10:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:10:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-10-15 00:10:38,139 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 129 [2019-10-15 00:10:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:38,142 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-10-15 00:10:38,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-10-15 00:10:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:10:38,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:38,154 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:38,155 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1325380034, now seen corresponding path program 1 times [2019-10-15 00:10:38,156 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:38,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661502412] [2019-10-15 00:10:38,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:38,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:38,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:38,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661502412] [2019-10-15 00:10:38,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:38,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:38,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009984762] [2019-10-15 00:10:38,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:38,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:38,344 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-10-15 00:10:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:43,268 INFO L93 Difference]: Finished difference Result 7205 states and 11771 transitions. [2019-10-15 00:10:43,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:43,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-15 00:10:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:43,299 INFO L225 Difference]: With dead ends: 7205 [2019-10-15 00:10:43,300 INFO L226 Difference]: Without dead ends: 4347 [2019-10-15 00:10:43,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-10-15 00:10:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-10-15 00:10:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-10-15 00:10:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-10-15 00:10:43,431 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 141 [2019-10-15 00:10:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:43,432 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-10-15 00:10:43,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-10-15 00:10:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 00:10:43,435 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:43,435 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:43,435 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash 163779891, now seen corresponding path program 1 times [2019-10-15 00:10:43,436 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:43,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933886448] [2019-10-15 00:10:43,437 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:43,437 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:43,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:43,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933886448] [2019-10-15 00:10:43,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065670457] [2019-10-15 00:10:43,731 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 [2019-10-15 00:10:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:43,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:10:43,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:44,009 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:44,088 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:10:44,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 00:10:44,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308443171] [2019-10-15 00:10:44,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:44,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:44,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:44,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:44,092 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 4 states. [2019-10-15 00:10:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:49,938 INFO L93 Difference]: Finished difference Result 15774 states and 22539 transitions. [2019-10-15 00:10:49,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:49,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-15 00:10:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:49,993 INFO L225 Difference]: With dead ends: 15774 [2019-10-15 00:10:49,993 INFO L226 Difference]: Without dead ends: 11449 [2019-10-15 00:10:50,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11449 states. [2019-10-15 00:10:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11449 to 10040. [2019-10-15 00:10:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10040 states. [2019-10-15 00:10:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 13191 transitions. [2019-10-15 00:10:50,416 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 13191 transitions. Word has length 166 [2019-10-15 00:10:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:50,418 INFO L462 AbstractCegarLoop]: Abstraction has 10040 states and 13191 transitions. [2019-10-15 00:10:50,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 13191 transitions. [2019-10-15 00:10:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-15 00:10:50,424 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:50,424 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:50,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:50,639 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1744081679, now seen corresponding path program 1 times [2019-10-15 00:10:50,641 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:50,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780363137] [2019-10-15 00:10:50,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:50,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:50,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:50,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780363137] [2019-10-15 00:10:50,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91730609] [2019-10-15 00:10:50,857 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 [2019-10-15 00:10:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:50,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:50,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 00:10:51,035 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:51,137 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:51,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-15 00:10:51,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855123679] [2019-10-15 00:10:51,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:51,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:51,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:51,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:51,139 INFO L87 Difference]: Start difference. First operand 10040 states and 13191 transitions. Second operand 5 states. [2019-10-15 00:10:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:55,810 INFO L93 Difference]: Finished difference Result 20276 states and 26977 transitions. [2019-10-15 00:10:55,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:55,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2019-10-15 00:10:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:55,858 INFO L225 Difference]: With dead ends: 20276 [2019-10-15 00:10:55,858 INFO L226 Difference]: Without dead ends: 10242 [2019-10-15 00:10:55,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 395 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:10:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2019-10-15 00:10:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 9475. [2019-10-15 00:10:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9475 states. [2019-10-15 00:10:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9475 states to 9475 states and 11729 transitions. [2019-10-15 00:10:56,100 INFO L78 Accepts]: Start accepts. Automaton has 9475 states and 11729 transitions. Word has length 200 [2019-10-15 00:10:56,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:56,101 INFO L462 AbstractCegarLoop]: Abstraction has 9475 states and 11729 transitions. [2019-10-15 00:10:56,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9475 states and 11729 transitions. [2019-10-15 00:10:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-10-15 00:10:56,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:56,107 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:56,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:56,320 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:56,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141262, now seen corresponding path program 1 times [2019-10-15 00:10:56,326 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:56,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263486998] [2019-10-15 00:10:56,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:56,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:56,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat