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/Problem01_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:53,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:53,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:53,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:53,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:53,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:53,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:53,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:53,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:53,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:53,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:53,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:53,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:53,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:53,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:53,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:53,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:53,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:53,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:53,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:53,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:53,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:53,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:53,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:53,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:53:53,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:53:53,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:53:53,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:53:53,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:53:53,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:53:53,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:53,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:53,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:53,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:53,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:53,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:53,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:53,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:53,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:53,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:53,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:53,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:53:53,432 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:53,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:53,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:53,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:53,434 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:53,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:53,435 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:53,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:53,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:53,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:53,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:53,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:53,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:53,436 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:53,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:53,437 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:53,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:53,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:53,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:53,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:53,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:53,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:53,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:53,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:53,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:53,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:53,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:53,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:53,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:53:53,736 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:53,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:53,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:53,754 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:53,755 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:53,755 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label26.c [2019-10-14 23:53:53,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc0f73e3/2212a0ca90a2484894d219f05472903c/FLAGf8f5f6d3b [2019-10-14 23:53:54,470 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:54,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label26.c [2019-10-14 23:53:54,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc0f73e3/2212a0ca90a2484894d219f05472903c/FLAGf8f5f6d3b [2019-10-14 23:53:54,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc0f73e3/2212a0ca90a2484894d219f05472903c [2019-10-14 23:53:54,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:54,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:54,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:54,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:54,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:54,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:54" (1/1) ... [2019-10-14 23:53:54,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4621a2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:54, skipping insertion in model container [2019-10-14 23:53:54,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:54" (1/1) ... [2019-10-14 23:53:54,718 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:54,777 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:55,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:55,256 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:55,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:55,537 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:55,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55 WrapperNode [2019-10-14 23:53:55,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:55,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:55,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:55,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:55,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (1/1) ... [2019-10-14 23:53:55,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:55,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:55,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:55,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:55,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:55,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:55,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:55,720 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:55,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:55,720 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:55,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:56,869 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:56,870 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:56,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:56 BoogieIcfgContainer [2019-10-14 23:53:56,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:56,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:56,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:56,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:56,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:54" (1/3) ... [2019-10-14 23:53:56,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6815aad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:56, skipping insertion in model container [2019-10-14 23:53:56,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55" (2/3) ... [2019-10-14 23:53:56,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6815aad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:56, skipping insertion in model container [2019-10-14 23:53:56,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:56" (3/3) ... [2019-10-14 23:53:56,900 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label26.c [2019-10-14 23:53:56,911 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:56,922 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:56,935 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:56,972 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:56,972 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:56,972 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:56,973 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:56,973 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:56,973 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:56,973 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:56,973 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:53:57,030 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:57,031 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:57,033 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1414431897, now seen corresponding path program 1 times [2019-10-14 23:53:57,054 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:57,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873241364] [2019-10-14 23:53:57,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:57,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:57,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:57,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873241364] [2019-10-14 23:53:57,609 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:57,609 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:57,610 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690617652] [2019-10-14 23:53:57,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:57,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:57,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:57,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:57,635 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:58,555 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:58,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:58,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2019-10-14 23:53:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:58,591 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:58,592 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:58,607 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:53:58,733 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 109 [2019-10-14 23:53:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:58,735 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:53:58,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:53:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:53:58,748 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:58,749 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:53:58,749 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash -609512656, now seen corresponding path program 1 times [2019-10-14 23:53:58,750 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:58,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521849631] [2019-10-14 23:53:58,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:58,751 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:58,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:58,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521849631] [2019-10-14 23:53:58,923 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:58,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:58,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614233751] [2019-10-14 23:53:58,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:58,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:58,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:58,927 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:53:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:59,748 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:53:59,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:59,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-14 23:53:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:59,756 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:53:59,756 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:53:59,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:53:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:53:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:53:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:53:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-10-14 23:53:59,801 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 119 [2019-10-14 23:53:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:59,802 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-10-14 23:53:59,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-10-14 23:53:59,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:53:59,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:59,805 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:59,805 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:59,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1252784430, now seen corresponding path program 1 times [2019-10-14 23:53:59,806 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:59,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167093991] [2019-10-14 23:53:59,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:59,807 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:59,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:00,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167093991] [2019-10-14 23:54:00,189 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:00,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:54:00,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160480561] [2019-10-14 23:54:00,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:54:00,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:00,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:54:00,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:54:00,191 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 5 states. [2019-10-14 23:54:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:00,894 INFO L93 Difference]: Finished difference Result 1205 states and 1730 transitions. [2019-10-14 23:54:00,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:54:00,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2019-10-14 23:54:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:00,899 INFO L225 Difference]: With dead ends: 1205 [2019-10-14 23:54:00,900 INFO L226 Difference]: Without dead ends: 554 [2019-10-14 23:54:00,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:54:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-14 23:54:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-14 23:54:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-14 23:54:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 712 transitions. [2019-10-14 23:54:00,937 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 712 transitions. Word has length 120 [2019-10-14 23:54:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:00,938 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 712 transitions. [2019-10-14 23:54:00,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:54:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 712 transitions. [2019-10-14 23:54:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:54:00,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:00,941 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:54:00,941 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:00,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1557577546, now seen corresponding path program 1 times [2019-10-14 23:54:00,942 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:00,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840296959] [2019-10-14 23:54:00,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:00,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:00,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:01,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840296959] [2019-10-14 23:54:01,092 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:01,093 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:54:01,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060162453] [2019-10-14 23:54:01,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:54:01,094 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:01,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:54:01,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:54:01,095 INFO L87 Difference]: Start difference. First operand 554 states and 712 transitions. Second operand 4 states. [2019-10-14 23:54:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:01,838 INFO L93 Difference]: Finished difference Result 1372 states and 1784 transitions. [2019-10-14 23:54:01,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:54:01,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-14 23:54:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:01,848 INFO L225 Difference]: With dead ends: 1372 [2019-10-14 23:54:01,848 INFO L226 Difference]: Without dead ends: 824 [2019-10-14 23:54:01,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:54:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2019-10-14 23:54:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2019-10-14 23:54:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2019-10-14 23:54:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1027 transitions. [2019-10-14 23:54:01,907 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1027 transitions. Word has length 124 [2019-10-14 23:54:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:01,908 INFO L462 AbstractCegarLoop]: Abstraction has 824 states and 1027 transitions. [2019-10-14 23:54:01,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:54:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1027 transitions. [2019-10-14 23:54:01,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 23:54:01,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:01,917 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:01,918 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:01,918 INFO L82 PathProgramCache]: Analyzing trace with hash -323555598, now seen corresponding path program 1 times [2019-10-14 23:54:01,919 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:01,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525170034] [2019-10-14 23:54:01,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:01,920 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:01,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 23:54:02,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525170034] [2019-10-14 23:54:02,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285558183] [2019-10-14 23:54:02,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:02,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:02,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-14 23:54:02,306 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-14 23:54:02,406 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:54:02,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:54:02,407 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100363364] [2019-10-14 23:54:02,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:02,408 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:02,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:02,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:54:02,409 INFO L87 Difference]: Start difference. First operand 824 states and 1027 transitions. Second operand 3 states. [2019-10-14 23:54:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:02,900 INFO L93 Difference]: Finished difference Result 2321 states and 2939 transitions. [2019-10-14 23:54:02,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:02,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2019-10-14 23:54:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:02,915 INFO L225 Difference]: With dead ends: 2321 [2019-10-14 23:54:02,915 INFO L226 Difference]: Without dead ends: 1503 [2019-10-14 23:54:02,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:54:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2019-10-14 23:54:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1501. [2019-10-14 23:54:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1501 states. [2019-10-14 23:54:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 1855 transitions. [2019-10-14 23:54:02,991 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 1855 transitions. Word has length 168 [2019-10-14 23:54:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:02,995 INFO L462 AbstractCegarLoop]: Abstraction has 1501 states and 1855 transitions. [2019-10-14 23:54:02,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 1855 transitions. [2019-10-14 23:54:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 23:54:03,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:03,004 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:03,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:03,218 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:03,219 INFO L82 PathProgramCache]: Analyzing trace with hash 962888314, now seen corresponding path program 1 times [2019-10-14 23:54:03,220 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:03,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513259382] [2019-10-14 23:54:03,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:03,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:03,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 71 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 23:54:03,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513259382] [2019-10-14 23:54:03,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208170168] [2019-10-14 23:54:03,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:03,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:54:03,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:54:03,629 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:54:03,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [820964970] [2019-10-14 23:54:03,753 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 173 [2019-10-14 23:54:03,831 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:03,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)