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_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:53,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:53,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:53,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:53,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:53,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:53,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:53,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:53,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:53,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:53,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:53,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:53,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:53,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:53,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:53,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:53,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:53,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:53,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:53,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:53,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:53,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:53,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:53,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:53,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:53:53,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:53:53,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:53:53,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:53:53,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:53:53,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:53:53,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:53,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:53,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:53,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:53,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:53,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:53,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:53,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:53,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:53,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:53,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:53,266 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 23:53:53,280 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:53,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:53,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:53,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:53,282 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:53,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:53,283 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:53,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:53,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:53,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:53,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:53,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:53,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:53,284 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:53,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:53,284 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:53,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:53,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:53,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:53,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:53,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:53,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:53,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:53,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:53,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:53,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:53,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:53,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:53,287 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 23:53:53,564 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:53,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:53,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:53,589 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:53,590 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:53,591 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-10-14 23:53:53,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd8b5a03f/b1dc5554b0864600b30ed0dc0fa1eded/FLAGfb2d80f95 [2019-10-14 23:53:54,193 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:54,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-10-14 23:53:54,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd8b5a03f/b1dc5554b0864600b30ed0dc0fa1eded/FLAGfb2d80f95 [2019-10-14 23:53:54,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd8b5a03f/b1dc5554b0864600b30ed0dc0fa1eded [2019-10-14 23:53:54,503 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:54,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:54,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:54,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:54,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:54,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:54" (1/1) ... [2019-10-14 23:53:54,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 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 23:53:54,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:54" (1/1) ... [2019-10-14 23:53:54,524 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:54,583 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:55,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:55,094 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:55,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:55,274 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:55,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:55 WrapperNode [2019-10-14 23:53:55,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:55,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:55,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:55,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:55,286 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 23:53:55,286 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 23:53:55,303 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 23:53:55,303 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 23:53:55,351 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 23:53:55,369 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 23:53:55,374 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 23:53:55,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:55,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:55,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:55,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:55,382 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 23:53:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:56,552 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:56,552 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:56,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:56 BoogieIcfgContainer [2019-10-14 23:53:56,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:56,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:56,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:56,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:56,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:54" (1/3) ... [2019-10-14 23:53:56,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bc51b7 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 23:53:56,562 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 23:53:56,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bc51b7 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 23:53:56,563 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 23:53:56,570 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label25.c [2019-10-14 23:53:56,583 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:56,594 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:56,605 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:56,644 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:56,644 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:56,644 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:56,644 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:56,645 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:56,645 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:56,645 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:56,645 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 23:53:56,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:56,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:56,701 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:56,706 INFO L82 PathProgramCache]: Analyzing trace with hash -665077081, now seen corresponding path program 1 times [2019-10-14 23:53:56,713 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:56,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838802245] [2019-10-14 23:53:56,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:56,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:56,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:57,249 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 23:53:57,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838802245] [2019-10-14 23:53:57,252 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:57,252 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:57,253 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616265655] [2019-10-14 23:53:57,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:57,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:57,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:57,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:57,286 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:58,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:58,119 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:58,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:58,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-14 23:53:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:58,149 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:58,149 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:58,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-10-14 23:53:58,273 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 125 [2019-10-14 23:53:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:58,275 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-10-14 23:53:58,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-10-14 23:53:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:53:58,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:58,289 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:58,289 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1811316394, now seen corresponding path program 1 times [2019-10-14 23:53:58,291 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:58,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603210686] [2019-10-14 23:53:58,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:58,292 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:58,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:58,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603210686] [2019-10-14 23:53:58,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:58,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:53:58,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19478549] [2019-10-14 23:53:58,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:53:58,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:53:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:53:58,422 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-10-14 23:53:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:59,151 INFO L93 Difference]: Finished difference Result 840 states and 1253 transitions. [2019-10-14 23:53:59,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:59,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2019-10-14 23:53:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:59,159 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:53:59,159 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:53:59,161 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 [2019-10-14 23:53:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:53:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-10-14 23:53:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 23:53:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 788 transitions. [2019-10-14 23:53:59,200 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 788 transitions. Word has length 134 [2019-10-14 23:53:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:59,201 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 788 transitions. [2019-10-14 23:53:59,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:53:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 788 transitions. [2019-10-14 23:53:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 23:53:59,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:59,206 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:59,206 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1203912387, now seen corresponding path program 1 times [2019-10-14 23:53:59,207 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:59,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685621084] [2019-10-14 23:53:59,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:59,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:59,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:59,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685621084] [2019-10-14 23:53:59,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810807292] [2019-10-14 23:53:59,319 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 23:53:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:59,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:59,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:53:59,568 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:53:59,645 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:53:59,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:53:59,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825607201] [2019-10-14 23:53:59,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:59,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:53:59,648 INFO L87 Difference]: Start difference. First operand 558 states and 788 transitions. Second operand 3 states. [2019-10-14 23:54:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:00,195 INFO L93 Difference]: Finished difference Result 1521 states and 2173 transitions. [2019-10-14 23:54:00,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:00,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2019-10-14 23:54:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:00,231 INFO L225 Difference]: With dead ends: 1521 [2019-10-14 23:54:00,231 INFO L226 Difference]: Without dead ends: 969 [2019-10-14 23:54:00,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 288 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 23:54:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2019-10-14 23:54:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 969. [2019-10-14 23:54:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2019-10-14 23:54:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1329 transitions. [2019-10-14 23:54:00,280 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1329 transitions. Word has length 145 [2019-10-14 23:54:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:00,281 INFO L462 AbstractCegarLoop]: Abstraction has 969 states and 1329 transitions. [2019-10-14 23:54:00,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1329 transitions. [2019-10-14 23:54:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-14 23:54:00,285 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:00,285 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:00,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:00,490 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:00,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:00,490 INFO L82 PathProgramCache]: Analyzing trace with hash 874887550, now seen corresponding path program 1 times [2019-10-14 23:54:00,491 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:00,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457544044] [2019-10-14 23:54:00,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:00,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:00,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:00,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457544044] [2019-10-14 23:54:00,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223304213] [2019-10-14 23:54:00,726 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 23:54:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:00,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:00,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:00,847 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:00,893 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:54:00,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-14 23:54:00,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373254613] [2019-10-14 23:54:00,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:00,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:00,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:54:00,895 INFO L87 Difference]: Start difference. First operand 969 states and 1329 transitions. Second operand 3 states. [2019-10-14 23:54:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:01,482 INFO L93 Difference]: Finished difference Result 2887 states and 4054 transitions. [2019-10-14 23:54:01,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:01,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-10-14 23:54:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:01,496 INFO L225 Difference]: With dead ends: 2887 [2019-10-14 23:54:01,496 INFO L226 Difference]: Without dead ends: 1924 [2019-10-14 23:54:01,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 289 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:54:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2019-10-14 23:54:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1654. [2019-10-14 23:54:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1654 states. [2019-10-14 23:54:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2226 transitions. [2019-10-14 23:54:01,561 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2226 transitions. Word has length 144 [2019-10-14 23:54:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:01,562 INFO L462 AbstractCegarLoop]: Abstraction has 1654 states and 2226 transitions. [2019-10-14 23:54:01,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2226 transitions. [2019-10-14 23:54:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 23:54:01,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:01,570 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:54:01,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:01,784 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1505528148, now seen corresponding path program 1 times [2019-10-14 23:54:01,784 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:01,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513125958] [2019-10-14 23:54:01,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:01,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:01,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:01,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513125958] [2019-10-14 23:54:01,894 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:01,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:01,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685714820] [2019-10-14 23:54:01,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:01,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:01,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:01,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:01,897 INFO L87 Difference]: Start difference. First operand 1654 states and 2226 transitions. Second operand 6 states. [2019-10-14 23:54:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:02,638 INFO L93 Difference]: Finished difference Result 4154 states and 5746 transitions. [2019-10-14 23:54:02,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:02,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-10-14 23:54:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:02,654 INFO L225 Difference]: With dead ends: 4154 [2019-10-14 23:54:02,654 INFO L226 Difference]: Without dead ends: 2506 [2019-10-14 23:54:02,660 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 23:54:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2019-10-14 23:54:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2498. [2019-10-14 23:54:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2498 states. [2019-10-14 23:54:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3355 transitions. [2019-10-14 23:54:02,748 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3355 transitions. Word has length 153 [2019-10-14 23:54:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:02,749 INFO L462 AbstractCegarLoop]: Abstraction has 2498 states and 3355 transitions. [2019-10-14 23:54:02,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3355 transitions. [2019-10-14 23:54:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-14 23:54:02,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:02,758 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:54:02,758 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572581, now seen corresponding path program 1 times [2019-10-14 23:54:02,759 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:02,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506521381] [2019-10-14 23:54:02,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:02,764 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:02,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:02,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506521381] [2019-10-14 23:54:02,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714140094] [2019-10-14 23:54:02,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:54:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:02,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:54:02,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:03,055 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:03,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [959045577] [2019-10-14 23:54:03,195 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 165 [2019-10-14 23:54:03,243 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:03,243 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)