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_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:03:35,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:35,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:35,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:35,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:35,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:35,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:35,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:35,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:35,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:35,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:35,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:35,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:35,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:35,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:35,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:35,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:35,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:35,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:35,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:35,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:35,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:35,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:35,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:35,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:03:35,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:03:35,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:03:35,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:03:35,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:03:35,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:03:35,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:03:35,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:03:35,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:03:35,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:03:35,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:03:35,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:03:35,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:03:35,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:03:35,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:35,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:35,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:35,387 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 20:03:35,401 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:35,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:35,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:35,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:35,403 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:35,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:35,403 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:35,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:35,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:35,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:35,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:35,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:35,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:35,405 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:35,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:35,405 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:35,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:35,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:35,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:35,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:35,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:35,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:35,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:35,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:35,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:35,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:35,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:35,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:35,408 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 20:03:35,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:35,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:35,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:35,718 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:35,718 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:35,719 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label06.c [2019-10-13 20:03:35,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28f0de31/e79ad7558267440891439d98b3a04d36/FLAGe68dfca0e [2019-10-13 20:03:36,413 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:36,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label06.c [2019-10-13 20:03:36,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28f0de31/e79ad7558267440891439d98b3a04d36/FLAGe68dfca0e [2019-10-13 20:03:36,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28f0de31/e79ad7558267440891439d98b3a04d36 [2019-10-13 20:03:36,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:36,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:36,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:36,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:36,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:36,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335c57fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:36, skipping insertion in model container [2019-10-13 20:03:36,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:36" (1/1) ... [2019-10-13 20:03:36,720 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:36,775 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:37,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:37,426 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:37,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:37,711 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:37,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37 WrapperNode [2019-10-13 20:03:37,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:37,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:37,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:37,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:37,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (1/1) ... [2019-10-13 20:03:37,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (1/1) ... [2019-10-13 20:03:37,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (1/1) ... [2019-10-13 20:03:37,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (1/1) ... [2019-10-13 20:03:37,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (1/1) ... [2019-10-13 20:03:37,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (1/1) ... [2019-10-13 20:03:37,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (1/1) ... [2019-10-13 20:03:37,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:37,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:37,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:37,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:37,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:39,898 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:39,899 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:39,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:39 BoogieIcfgContainer [2019-10-13 20:03:39,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:39,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:39,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:39,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:39,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:36" (1/3) ... [2019-10-13 20:03:39,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377f5ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:39, skipping insertion in model container [2019-10-13 20:03:39,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:37" (2/3) ... [2019-10-13 20:03:39,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377f5ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:39, skipping insertion in model container [2019-10-13 20:03:39,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:39" (3/3) ... [2019-10-13 20:03:39,921 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label06.c [2019-10-13 20:03:39,932 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:39,941 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:39,952 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:39,981 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:39,982 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:39,982 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:39,982 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:39,982 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:39,983 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:39,983 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:39,983 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:40,009 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:03:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 20:03:40,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:40,022 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:40,024 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:40,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1780384174, now seen corresponding path program 1 times [2019-10-13 20:03:40,042 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:40,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841419365] [2019-10-13 20:03:40,043 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:40,043 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:40,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:40,488 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 20:03:40,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841419365] [2019-10-13 20:03:40,491 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:40,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:03:40,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970111571] [2019-10-13 20:03:40,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:03:40,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:40,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:03:40,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:03:40,518 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-13 20:03:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:41,896 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-13 20:03:41,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:41,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-10-13 20:03:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:41,916 INFO L225 Difference]: With dead ends: 779 [2019-10-13 20:03:41,917 INFO L226 Difference]: Without dead ends: 425 [2019-10-13 20:03:41,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:03:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-13 20:03:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-13 20:03:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-13 20:03:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-10-13 20:03:42,026 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 69 [2019-10-13 20:03:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:42,026 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-10-13 20:03:42,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:03:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-10-13 20:03:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 20:03:42,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:42,034 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, 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 20:03:42,034 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:42,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1517741782, now seen corresponding path program 1 times [2019-10-13 20:03:42,035 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:42,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22909885] [2019-10-13 20:03:42,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:42,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:42,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:42,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22909885] [2019-10-13 20:03:42,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:42,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:03:42,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910104925] [2019-10-13 20:03:42,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:42,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:42,401 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 5 states. [2019-10-13 20:03:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:44,972 INFO L93 Difference]: Finished difference Result 1987 states and 3274 transitions. [2019-10-13 20:03:44,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 20:03:44,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-10-13 20:03:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:44,985 INFO L225 Difference]: With dead ends: 1987 [2019-10-13 20:03:44,986 INFO L226 Difference]: Without dead ends: 1573 [2019-10-13 20:03:44,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2019-10-13 20:03:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1184. [2019-10-13 20:03:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-10-13 20:03:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1836 transitions. [2019-10-13 20:03:45,061 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1836 transitions. Word has length 143 [2019-10-13 20:03:45,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:45,062 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1836 transitions. [2019-10-13 20:03:45,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1836 transitions. [2019-10-13 20:03:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-13 20:03:45,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:45,070 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, 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] [2019-10-13 20:03:45,071 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1441313139, now seen corresponding path program 1 times [2019-10-13 20:03:45,071 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:45,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388817316] [2019-10-13 20:03:45,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:45,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:45,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:45,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388817316] [2019-10-13 20:03:45,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:45,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:03:45,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107489065] [2019-10-13 20:03:45,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:45,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:45,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:03:45,278 INFO L87 Difference]: Start difference. First operand 1184 states and 1836 transitions. Second operand 5 states. [2019-10-13 20:03:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:46,797 INFO L93 Difference]: Finished difference Result 2982 states and 4740 transitions. [2019-10-13 20:03:46,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:03:46,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2019-10-13 20:03:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:46,817 INFO L225 Difference]: With dead ends: 2982 [2019-10-13 20:03:46,817 INFO L226 Difference]: Without dead ends: 1804 [2019-10-13 20:03:46,821 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 20:03:46,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2019-10-13 20:03:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1394. [2019-10-13 20:03:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2019-10-13 20:03:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2125 transitions. [2019-10-13 20:03:46,927 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2125 transitions. Word has length 183 [2019-10-13 20:03:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:46,929 INFO L462 AbstractCegarLoop]: Abstraction has 1394 states and 2125 transitions. [2019-10-13 20:03:46,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2125 transitions. [2019-10-13 20:03:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 20:03:46,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:46,949 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:46,950 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:46,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1893235657, now seen corresponding path program 1 times [2019-10-13 20:03:46,951 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:46,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613044372] [2019-10-13 20:03:46,952 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:46,952 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:46,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 124 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:47,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613044372] [2019-10-13 20:03:47,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940620991] [2019-10-13 20:03:47,232 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 20:03:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:47,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:03:47,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:03:47,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 124 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:47,752 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:03:47,753 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:03:47,753 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756704209] [2019-10-13 20:03:47,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:47,754 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:47,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:47,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:03:47,755 INFO L87 Difference]: Start difference. First operand 1394 states and 2125 transitions. Second operand 5 states. [2019-10-13 20:03:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:49,523 INFO L93 Difference]: Finished difference Result 3591 states and 5631 transitions. [2019-10-13 20:03:49,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:03:49,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-10-13 20:03:49,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:49,542 INFO L225 Difference]: With dead ends: 3591 [2019-10-13 20:03:49,542 INFO L226 Difference]: Without dead ends: 2203 [2019-10-13 20:03:49,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:03:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2019-10-13 20:03:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2190. [2019-10-13 20:03:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2190 states. [2019-10-13 20:03:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3206 transitions. [2019-10-13 20:03:49,667 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3206 transitions. Word has length 234 [2019-10-13 20:03:49,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:49,667 INFO L462 AbstractCegarLoop]: Abstraction has 2190 states and 3206 transitions. [2019-10-13 20:03:49,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3206 transitions. [2019-10-13 20:03:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-13 20:03:49,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:49,674 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:03:49,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:49,879 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:49,880 INFO L82 PathProgramCache]: Analyzing trace with hash -2140112339, now seen corresponding path program 1 times [2019-10-13 20:03:49,880 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:49,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602499194] [2019-10-13 20:03:49,880 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:49,880 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:49,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 124 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:50,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602499194] [2019-10-13 20:03:50,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194748200] [2019-10-13 20:03:50,083 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 20:03:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:50,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 20:03:50,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 20:03:50,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 20:03:50,408 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:03:50,408 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2019-10-13 20:03:50,408 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14110036] [2019-10-13 20:03:50,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:50,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:50,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:50,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:03:50,412 INFO L87 Difference]: Start difference. First operand 2190 states and 3206 transitions. Second operand 4 states. [2019-10-13 20:03:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:51,127 INFO L93 Difference]: Finished difference Result 4368 states and 6415 transitions. [2019-10-13 20:03:51,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:51,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 255 [2019-10-13 20:03:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:51,139 INFO L225 Difference]: With dead ends: 4368 [2019-10-13 20:03:51,140 INFO L226 Difference]: Without dead ends: 2184 [2019-10-13 20:03:51,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 507 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:03:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2019-10-13 20:03:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2184. [2019-10-13 20:03:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2019-10-13 20:03:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3188 transitions. [2019-10-13 20:03:51,202 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3188 transitions. Word has length 255 [2019-10-13 20:03:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:51,202 INFO L462 AbstractCegarLoop]: Abstraction has 2184 states and 3188 transitions. [2019-10-13 20:03:51,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3188 transitions. [2019-10-13 20:03:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-10-13 20:03:51,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:51,211 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:51,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:51,419 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:51,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1955526003, now seen corresponding path program 1 times [2019-10-13 20:03:51,420 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:51,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138727409] [2019-10-13 20:03:51,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:51,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:51,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 186 proven. 136 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-13 20:03:51,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138727409] [2019-10-13 20:03:51,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363381630] [2019-10-13 20:03:51,644 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 20:03:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:51,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:03:51,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-10-13 20:03:51,874 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 186 proven. 136 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-13 20:03:51,992 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:03:51,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:03:51,993 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581234441] [2019-10-13 20:03:51,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:51,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:51,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:51,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:03:51,994 INFO L87 Difference]: Start difference. First operand 2184 states and 3188 transitions. Second operand 5 states. [2019-10-13 20:03:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:53,477 INFO L93 Difference]: Finished difference Result 5788 states and 8780 transitions. [2019-10-13 20:03:53,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:53,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2019-10-13 20:03:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:53,503 INFO L225 Difference]: With dead ends: 5788 [2019-10-13 20:03:53,503 INFO L226 Difference]: Without dead ends: 3610 [2019-10-13 20:03:53,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 604 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 20:03:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2019-10-13 20:03:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3378. [2019-10-13 20:03:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3378 states. [2019-10-13 20:03:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 4918 transitions. [2019-10-13 20:03:53,621 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 4918 transitions. Word has length 304 [2019-10-13 20:03:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:53,621 INFO L462 AbstractCegarLoop]: Abstraction has 3378 states and 4918 transitions. [2019-10-13 20:03:53,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 4918 transitions. [2019-10-13 20:03:53,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-10-13 20:03:53,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:53,635 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:53,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:53,843 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1610214185, now seen corresponding path program 1 times [2019-10-13 20:03:53,845 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:53,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754604743] [2019-10-13 20:03:53,846 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:53,846 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:53,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 262 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 20:03:54,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754604743] [2019-10-13 20:03:54,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512429730] [2019-10-13 20:03:54,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:54,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:54,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:03:54,561 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 262 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 20:03:54,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1092096871] [2019-10-13 20:03:54,728 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 307 [2019-10-13 20:03:54,779 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:03:54,780 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)