java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:03:49,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:49,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:49,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:49,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:49,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:49,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:49,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:49,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:49,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:49,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:49,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:49,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:49,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:49,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:49,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:49,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:49,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:49,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:49,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:49,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:49,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:49,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:49,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:49,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:03:49,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:03:49,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:03:49,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:03:49,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:03:49,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:03:49,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:03:49,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:03:49,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:03:49,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:03:49,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:03:49,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:03:49,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:03:49,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:03:49,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:49,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:49,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:49,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:03:49,132 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:49,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:49,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:49,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:49,137 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:49,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:49,137 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:49,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:49,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:49,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:49,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:49,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:49,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:49,139 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:49,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:49,140 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:49,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:49,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:49,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:49,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:49,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:49,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:49,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:49,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:49,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:49,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:49,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:49,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:49,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:03:49,444 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:49,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:49,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:49,471 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:49,471 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:49,472 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-10-13 20:03:49,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a85f59c/95a9e182859f4994a6455df783ce4cc5/FLAG2fe810f6e [2019-10-13 20:03:50,108 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:50,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-10-13 20:03:50,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a85f59c/95a9e182859f4994a6455df783ce4cc5/FLAG2fe810f6e [2019-10-13 20:03:50,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a85f59c/95a9e182859f4994a6455df783ce4cc5 [2019-10-13 20:03:50,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:50,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:50,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:50,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:50,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:50,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:50" (1/1) ... [2019-10-13 20:03:50,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4924bc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:50, skipping insertion in model container [2019-10-13 20:03:50,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:50" (1/1) ... [2019-10-13 20:03:50,424 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:50,499 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:51,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:51,213 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:51,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:51,598 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:51,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51 WrapperNode [2019-10-13 20:03:51,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:51,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:51,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:51,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:51,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (1/1) ... [2019-10-13 20:03:51,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (1/1) ... [2019-10-13 20:03:51,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (1/1) ... [2019-10-13 20:03:51,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (1/1) ... [2019-10-13 20:03:51,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (1/1) ... [2019-10-13 20:03:51,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (1/1) ... [2019-10-13 20:03:51,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (1/1) ... [2019-10-13 20:03:51,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:51,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:51,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:51,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:51,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:51,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:51,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:51,837 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:51,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:51,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:51,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:51,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:53,799 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:53,800 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:53,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:53 BoogieIcfgContainer [2019-10-13 20:03:53,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:53,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:53,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:53,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:53,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:50" (1/3) ... [2019-10-13 20:03:53,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cda1f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:53, skipping insertion in model container [2019-10-13 20:03:53,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:51" (2/3) ... [2019-10-13 20:03:53,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cda1f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:53, skipping insertion in model container [2019-10-13 20:03:53,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:53" (3/3) ... [2019-10-13 20:03:53,843 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label12.c [2019-10-13 20:03:53,854 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:53,864 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:53,877 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:53,918 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:53,918 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:53,918 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:53,918 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:53,919 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:53,919 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:53,919 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:53,919 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:03:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 20:03:53,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:53,966 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] [2019-10-13 20:03:53,968 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1842297178, now seen corresponding path program 1 times [2019-10-13 20:03:53,984 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:53,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389679064] [2019-10-13 20:03:53,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:53,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:53,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:54,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389679064] [2019-10-13 20:03:54,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:54,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:03:54,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854683927] [2019-10-13 20:03:54,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:03:54,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:54,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:03:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:03:54,340 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-13 20:03:55,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:55,744 INFO L93 Difference]: Finished difference Result 787 states and 1379 transitions. [2019-10-13 20:03:55,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:55,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-10-13 20:03:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:55,763 INFO L225 Difference]: With dead ends: 787 [2019-10-13 20:03:55,763 INFO L226 Difference]: Without dead ends: 433 [2019-10-13 20:03:55,772 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 [2019-10-13 20:03:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-10-13 20:03:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 426. [2019-10-13 20:03:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-13 20:03:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 678 transitions. [2019-10-13 20:03:55,878 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 678 transitions. Word has length 31 [2019-10-13 20:03:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:55,879 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 678 transitions. [2019-10-13 20:03:55,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:03:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 678 transitions. [2019-10-13 20:03:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 20:03:55,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:55,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:55,887 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1072563117, now seen corresponding path program 1 times [2019-10-13 20:03:55,887 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:55,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397982648] [2019-10-13 20:03:55,888 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:55,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:55,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:56,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397982648] [2019-10-13 20:03:56,122 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:56,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:03:56,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438723605] [2019-10-13 20:03:56,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:56,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:56,125 INFO L87 Difference]: Start difference. First operand 426 states and 678 transitions. Second operand 5 states. [2019-10-13 20:03:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:57,903 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-10-13 20:03:57,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:03:57,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2019-10-13 20:03:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:57,918 INFO L225 Difference]: With dead ends: 1259 [2019-10-13 20:03:57,918 INFO L226 Difference]: Without dead ends: 839 [2019-10-13 20:03:57,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:03:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-10-13 20:03:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 627. [2019-10-13 20:03:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-10-13 20:03:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 934 transitions. [2019-10-13 20:03:57,963 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 934 transitions. Word has length 106 [2019-10-13 20:03:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:57,964 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 934 transitions. [2019-10-13 20:03:57,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 934 transitions. [2019-10-13 20:03:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-13 20:03:57,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:57,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:57,968 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash -855314794, now seen corresponding path program 1 times [2019-10-13 20:03:57,968 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:57,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045907164] [2019-10-13 20:03:57,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:57,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:57,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:58,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045907164] [2019-10-13 20:03:58,155 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:58,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:03:58,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555412055] [2019-10-13 20:03:58,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:58,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:58,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:58,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:58,161 INFO L87 Difference]: Start difference. First operand 627 states and 934 transitions. Second operand 5 states. [2019-10-13 20:04:00,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:00,020 INFO L93 Difference]: Finished difference Result 1872 states and 2846 transitions. [2019-10-13 20:04:00,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:04:00,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2019-10-13 20:04:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:00,037 INFO L225 Difference]: With dead ends: 1872 [2019-10-13 20:04:00,037 INFO L226 Difference]: Without dead ends: 1251 [2019-10-13 20:04:00,041 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:04:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-13 20:04:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1032. [2019-10-13 20:04:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-10-13 20:04:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1433 transitions. [2019-10-13 20:04:00,130 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1433 transitions. Word has length 117 [2019-10-13 20:04:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:00,131 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1433 transitions. [2019-10-13 20:04:00,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:04:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1433 transitions. [2019-10-13 20:04:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 20:04:00,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:00,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:04:00,146 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:00,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1681837426, now seen corresponding path program 1 times [2019-10-13 20:04:00,147 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:00,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301069003] [2019-10-13 20:04:00,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:00,148 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:00,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:00,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301069003] [2019-10-13 20:04:00,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785470248] [2019-10-13 20:04:00,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:00,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:04:00,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:00,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:00,794 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:04:00,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-13 20:04:00,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375556619] [2019-10-13 20:04:00,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:00,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:00,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:04:00,797 INFO L87 Difference]: Start difference. First operand 1032 states and 1433 transitions. Second operand 3 states. [2019-10-13 20:04:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:01,990 INFO L93 Difference]: Finished difference Result 2662 states and 3820 transitions. [2019-10-13 20:04:01,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:01,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-10-13 20:04:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:02,001 INFO L225 Difference]: With dead ends: 2662 [2019-10-13 20:04:02,001 INFO L226 Difference]: Without dead ends: 1636 [2019-10-13 20:04:02,004 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:04:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2019-10-13 20:04:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1629. [2019-10-13 20:04:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2019-10-13 20:04:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2257 transitions. [2019-10-13 20:04:02,067 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2257 transitions. Word has length 162 [2019-10-13 20:04:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:02,069 INFO L462 AbstractCegarLoop]: Abstraction has 1629 states and 2257 transitions. [2019-10-13 20:04:02,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2257 transitions. [2019-10-13 20:04:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 20:04:02,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:02,074 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:04:02,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:02,279 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:02,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1078800445, now seen corresponding path program 1 times [2019-10-13 20:04:02,280 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:02,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422037921] [2019-10-13 20:04:02,280 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:02,283 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:02,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 48 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:04:02,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422037921] [2019-10-13 20:04:02,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332040625] [2019-10-13 20:04:02,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:02,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:04:02,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 20:04:02,763 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 48 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:04:02,865 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:04:02,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:04:02,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308213197] [2019-10-13 20:04:02,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:04:02,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:04:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:04:02,868 INFO L87 Difference]: Start difference. First operand 1629 states and 2257 transitions. Second operand 5 states. [2019-10-13 20:04:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:04,497 INFO L93 Difference]: Finished difference Result 4500 states and 6394 transitions. [2019-10-13 20:04:04,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:04,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-10-13 20:04:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:04,516 INFO L225 Difference]: With dead ends: 4500 [2019-10-13 20:04:04,516 INFO L226 Difference]: Without dead ends: 2877 [2019-10-13 20:04:04,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:04:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2019-10-13 20:04:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2825. [2019-10-13 20:04:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2019-10-13 20:04:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3849 transitions. [2019-10-13 20:04:04,613 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3849 transitions. Word has length 186 [2019-10-13 20:04:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:04,614 INFO L462 AbstractCegarLoop]: Abstraction has 2825 states and 3849 transitions. [2019-10-13 20:04:04,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:04:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3849 transitions. [2019-10-13 20:04:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 20:04:04,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:04,619 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:04:04,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:04,832 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:04,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:04,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1420666926, now seen corresponding path program 1 times [2019-10-13 20:04:04,833 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:04,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982539041] [2019-10-13 20:04:04,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:04,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:04,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:05,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982539041] [2019-10-13 20:04:05,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045064917] [2019-10-13 20:04:05,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:05,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:04:05,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:05,214 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:05,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [94857241] [2019-10-13 20:04:05,332 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 188 [2019-10-13 20:04:05,391 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:04:05,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)