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/Problem14_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:06:39,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:06:39,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:06:39,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:06:39,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:06:39,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:06:39,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:06:39,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:06:39,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:06:39,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:06:39,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:06:39,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:06:39,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:06:39,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:06:39,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:06:39,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:06:39,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:06:39,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:06:39,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:06:39,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:06:39,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:06:39,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:06:39,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:06:39,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:06:39,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:06:39,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:06:39,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:06:39,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:06:39,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:06:39,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:06:39,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:06:39,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:06:39,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:06:39,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:06:39,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:06:39,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:06:39,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:06:39,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:06:39,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:06:39,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:06:39,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:06:39,361 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 20:06:39,394 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:06:39,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:06:39,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:06:39,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:06:39,399 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:06:39,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:06:39,402 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:06:39,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:06:39,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:06:39,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:06:39,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:06:39,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:06:39,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:06:39,404 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:06:39,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:06:39,404 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:06:39,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:06:39,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:06:39,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:06:39,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:06:39,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:06:39,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:06:39,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:06:39,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:06:39,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:06:39,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:06:39,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:06:39,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:06:39,408 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 20:06:39,728 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:06:39,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:06:39,748 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:06:39,750 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:06:39,750 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:06:39,751 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-10-13 20:06:39,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f86653f81/dadc3ded93f04b2a89739599b4966998/FLAG3a2bb6571 [2019-10-13 20:06:40,453 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:06:40,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-10-13 20:06:40,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f86653f81/dadc3ded93f04b2a89739599b4966998/FLAG3a2bb6571 [2019-10-13 20:06:40,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f86653f81/dadc3ded93f04b2a89739599b4966998 [2019-10-13 20:06:40,770 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:06:40,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:06:40,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:40,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:06:40,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:06:40,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:40" (1/1) ... [2019-10-13 20:06:40,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b5c0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:40, skipping insertion in model container [2019-10-13 20:06:40,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:40" (1/1) ... [2019-10-13 20:06:40,793 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:06:40,864 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:06:41,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:41,468 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:06:41,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:41,620 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:06:41,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41 WrapperNode [2019-10-13 20:06:41,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:41,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:06:41,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:06:41,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:06:41,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (1/1) ... [2019-10-13 20:06:41,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (1/1) ... [2019-10-13 20:06:41,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (1/1) ... [2019-10-13 20:06:41,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (1/1) ... [2019-10-13 20:06:41,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (1/1) ... [2019-10-13 20:06:41,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (1/1) ... [2019-10-13 20:06:41,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (1/1) ... [2019-10-13 20:06:41,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:06:41,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:06:41,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:06:41,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:06:41,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (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 20:06:41,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:06:41,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:06:41,833 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:06:41,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:06:41,833 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:06:41,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:06:41,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:06:41,835 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:06:41,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:06:41,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:06:41,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:06:43,301 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:06:43,301 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:06:43,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:43 BoogieIcfgContainer [2019-10-13 20:06:43,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:06:43,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:06:43,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:06:43,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:06:43,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:06:40" (1/3) ... [2019-10-13 20:06:43,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556b2148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:43, skipping insertion in model container [2019-10-13 20:06:43,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:41" (2/3) ... [2019-10-13 20:06:43,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556b2148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:43, skipping insertion in model container [2019-10-13 20:06:43,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:43" (3/3) ... [2019-10-13 20:06:43,319 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label15.c [2019-10-13 20:06:43,332 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:06:43,344 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:06:43,359 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:06:43,403 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:06:43,403 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:06:43,404 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:06:43,404 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:06:43,404 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:06:43,404 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:06:43,404 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:06:43,404 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:06:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:06:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 20:06:43,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:43,455 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] [2019-10-13 20:06:43,457 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:43,467 INFO L82 PathProgramCache]: Analyzing trace with hash -598870286, now seen corresponding path program 1 times [2019-10-13 20:06:43,478 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:43,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297895372] [2019-10-13 20:06:43,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:43,479 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:43,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:43,922 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 20:06:43,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297895372] [2019-10-13 20:06:43,924 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:43,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:06:43,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009113457] [2019-10-13 20:06:43,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:06:43,933 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:06:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:43,952 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:06:45,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:45,204 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:06:45,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:06:45,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-13 20:06:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:45,241 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:06:45,241 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:06:45,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:06:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:06:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:06:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:06:45,363 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 71 [2019-10-13 20:06:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:45,364 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:06:45,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:06:45,365 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:06:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 20:06:45,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:45,372 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:45,372 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 96309737, now seen corresponding path program 1 times [2019-10-13 20:06:45,373 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:45,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798346824] [2019-10-13 20:06:45,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:45,374 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:45,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:45,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798346824] [2019-10-13 20:06:45,678 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:45,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:45,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605368839] [2019-10-13 20:06:45,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:45,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:45,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:45,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:45,681 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:06:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:47,025 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-10-13 20:06:47,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:47,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-10-13 20:06:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:47,033 INFO L225 Difference]: With dead ends: 1122 [2019-10-13 20:06:47,033 INFO L226 Difference]: Without dead ends: 756 [2019-10-13 20:06:47,036 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 [2019-10-13 20:06:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-13 20:06:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-13 20:06:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-13 20:06:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-13 20:06:47,109 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 140 [2019-10-13 20:06:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:47,112 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-13 20:06:47,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-13 20:06:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:06:47,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:47,123 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:47,124 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:47,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1593048690, now seen corresponding path program 1 times [2019-10-13 20:06:47,125 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:47,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701519582] [2019-10-13 20:06:47,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:47,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:47,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:47,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701519582] [2019-10-13 20:06:47,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:47,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:47,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454200753] [2019-10-13 20:06:47,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:47,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:47,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:47,338 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-13 20:06:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:48,798 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-10-13 20:06:48,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:48,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-13 20:06:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:48,808 INFO L225 Difference]: With dead ends: 1904 [2019-10-13 20:06:48,809 INFO L226 Difference]: Without dead ends: 1158 [2019-10-13 20:06:48,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 20:06:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-13 20:06:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-13 20:06:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-13 20:06:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-13 20:06:48,862 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 141 [2019-10-13 20:06:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:48,863 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-13 20:06:48,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-13 20:06:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 20:06:48,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:48,866 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:48,866 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash -552951950, now seen corresponding path program 1 times [2019-10-13 20:06:48,867 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:48,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962744408] [2019-10-13 20:06:48,867 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:48,867 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:48,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:48,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962744408] [2019-10-13 20:06:48,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:48,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:48,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544572956] [2019-10-13 20:06:48,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:48,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:48,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:48,990 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-13 20:06:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:50,286 INFO L93 Difference]: Finished difference Result 2880 states and 4162 transitions. [2019-10-13 20:06:50,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:50,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-10-13 20:06:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:50,296 INFO L225 Difference]: With dead ends: 2880 [2019-10-13 20:06:50,296 INFO L226 Difference]: Without dead ends: 1748 [2019-10-13 20:06:50,300 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 20:06:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-10-13 20:06:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1326. [2019-10-13 20:06:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-10-13 20:06:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1863 transitions. [2019-10-13 20:06:50,368 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1863 transitions. Word has length 143 [2019-10-13 20:06:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:50,368 INFO L462 AbstractCegarLoop]: Abstraction has 1326 states and 1863 transitions. [2019-10-13 20:06:50,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1863 transitions. [2019-10-13 20:06:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-13 20:06:50,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:50,374 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:50,374 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash -621255906, now seen corresponding path program 1 times [2019-10-13 20:06:50,375 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:50,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618390217] [2019-10-13 20:06:50,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:50,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:50,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:06:50,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618390217] [2019-10-13 20:06:50,562 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:50,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:50,563 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436519096] [2019-10-13 20:06:50,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:50,564 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:50,566 INFO L87 Difference]: Start difference. First operand 1326 states and 1863 transitions. Second operand 4 states. [2019-10-13 20:06:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:51,976 INFO L93 Difference]: Finished difference Result 4126 states and 5834 transitions. [2019-10-13 20:06:51,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:51,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2019-10-13 20:06:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:51,992 INFO L225 Difference]: With dead ends: 4126 [2019-10-13 20:06:51,992 INFO L226 Difference]: Without dead ends: 2806 [2019-10-13 20:06:51,996 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 [2019-10-13 20:06:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2019-10-13 20:06:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2258. [2019-10-13 20:06:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2019-10-13 20:06:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3058 transitions. [2019-10-13 20:06:52,065 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3058 transitions. Word has length 227 [2019-10-13 20:06:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:52,066 INFO L462 AbstractCegarLoop]: Abstraction has 2258 states and 3058 transitions. [2019-10-13 20:06:52,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3058 transitions. [2019-10-13 20:06:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-10-13 20:06:52,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:52,078 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:52,078 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:52,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:52,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1660138625, now seen corresponding path program 1 times [2019-10-13 20:06:52,079 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:52,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436110327] [2019-10-13 20:06:52,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:52,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:52,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:52,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436110327] [2019-10-13 20:06:52,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210285343] [2019-10-13 20:06:52,469 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 20:06:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:52,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:06:52,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:52,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 20:06:52,878 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:53,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:53,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:53,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:53,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:53,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:53,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 128 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:53,561 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:06:53,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:06:53,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885543522] [2019-10-13 20:06:53,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:53,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:06:53,564 INFO L87 Difference]: Start difference. First operand 2258 states and 3058 transitions. Second operand 5 states. [2019-10-13 20:06:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:55,017 INFO L93 Difference]: Finished difference Result 4360 states and 5977 transitions. [2019-10-13 20:06:55,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:55,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2019-10-13 20:06:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:55,032 INFO L225 Difference]: With dead ends: 4360 [2019-10-13 20:06:55,033 INFO L226 Difference]: Without dead ends: 2290 [2019-10-13 20:06:55,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 667 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:06:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2019-10-13 20:06:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2270. [2019-10-13 20:06:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2270 states. [2019-10-13 20:06:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3040 transitions. [2019-10-13 20:06:55,144 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3040 transitions. Word has length 336 [2019-10-13 20:06:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:55,144 INFO L462 AbstractCegarLoop]: Abstraction has 2270 states and 3040 transitions. [2019-10-13 20:06:55,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3040 transitions. [2019-10-13 20:06:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-10-13 20:06:55,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:55,156 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:55,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:55,361 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:55,361 INFO L82 PathProgramCache]: Analyzing trace with hash -178670679, now seen corresponding path program 1 times [2019-10-13 20:06:55,362 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:55,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441843900] [2019-10-13 20:06:55,364 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:55,364 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:55,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 278 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:56,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441843900] [2019-10-13 20:06:56,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278370905] [2019-10-13 20:06:56,519 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 20:06:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:56,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:06:56,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:56,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:06:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 354 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 20:06:57,040 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:57,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:06:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 200 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:57,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [581448069] [2019-10-13 20:06:57,656 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 421 [2019-10-13 20:06:57,707 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:06:57,707 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)