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/Problem02_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:55:34,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:55:34,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:55:34,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:55:34,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:55:34,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:55:34,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:55:34,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:55:34,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:55:34,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:55:34,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:55:34,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:55:34,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:55:34,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:55:34,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:55:34,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:55:34,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:55:34,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:55:34,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:55:34,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:55:34,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:55:34,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:55:34,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:55:34,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:55:34,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:55:34,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:55:34,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:55:34,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:55:34,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:55:34,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:55:34,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:55:34,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:55:34,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:55:34,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:55:34,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:55:34,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:55:34,368 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 23:55:34,390 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:34,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:34,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:34,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:34,393 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:34,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:34,393 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:34,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:34,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:34,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:34,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:34,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:34,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:34,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:34,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:34,396 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:34,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:34,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:34,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:34,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:34,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:34,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:34,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:34,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:34,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:34,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:34,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:34,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:34,400 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 23:55:34,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:34,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:34,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:34,718 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:34,719 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:34,719 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label07.c [2019-10-14 23:55:34,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67eb95e3d/d53a867a88474b6982248838d5b1cd9b/FLAG6ffc2fc77 [2019-10-14 23:55:35,387 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:35,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label07.c [2019-10-14 23:55:35,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67eb95e3d/d53a867a88474b6982248838d5b1cd9b/FLAG6ffc2fc77 [2019-10-14 23:55:35,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67eb95e3d/d53a867a88474b6982248838d5b1cd9b [2019-10-14 23:55:35,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:35,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:35,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:35,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:35,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:35,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:35" (1/1) ... [2019-10-14 23:55:35,657 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 11:55:35, skipping insertion in model container [2019-10-14 23:55:35,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:35" (1/1) ... [2019-10-14 23:55:35,666 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:35,726 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:36,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:36,283 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:36,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:36,460 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:36,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36 WrapperNode [2019-10-14 23:55:36,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:36,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:36,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:36,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:36,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (1/1) ... [2019-10-14 23:55:36,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (1/1) ... [2019-10-14 23:55:36,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (1/1) ... [2019-10-14 23:55:36,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (1/1) ... [2019-10-14 23:55:36,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (1/1) ... [2019-10-14 23:55:36,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (1/1) ... [2019-10-14 23:55:36,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (1/1) ... [2019-10-14 23:55:36,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:36,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:36,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:36,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:36,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (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 23:55:36,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:36,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:36,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:36,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:36,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:37,764 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:37,764 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:37,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:37 BoogieIcfgContainer [2019-10-14 23:55:37,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:37,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:37,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:37,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:37,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:35" (1/3) ... [2019-10-14 23:55:37,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d224f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:37, skipping insertion in model container [2019-10-14 23:55:37,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:36" (2/3) ... [2019-10-14 23:55:37,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d224f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:37, skipping insertion in model container [2019-10-14 23:55:37,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:37" (3/3) ... [2019-10-14 23:55:37,775 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label07.c [2019-10-14 23:55:37,786 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:37,796 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:37,809 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:37,842 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:37,842 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:37,842 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:37,842 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:37,844 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:37,845 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:37,845 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:37,845 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:55:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 23:55:37,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:37,911 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:37,914 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:37,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:37,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1144571695, now seen corresponding path program 1 times [2019-10-14 23:55:37,937 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:37,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363753302] [2019-10-14 23:55:37,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:37,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:37,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:38,475 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 23:55:38,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363753302] [2019-10-14 23:55:38,477 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:38,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:38,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929666532] [2019-10-14 23:55:38,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:38,486 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:38,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:38,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:38,505 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:55:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:39,418 INFO L93 Difference]: Finished difference Result 618 states and 1058 transitions. [2019-10-14 23:55:39,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:39,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2019-10-14 23:55:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:39,452 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:55:39,452 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:55:39,465 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 23:55:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:55:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 318. [2019-10-14 23:55:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2019-10-14 23:55:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 470 transitions. [2019-10-14 23:55:39,540 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 470 transitions. Word has length 145 [2019-10-14 23:55:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:39,541 INFO L462 AbstractCegarLoop]: Abstraction has 318 states and 470 transitions. [2019-10-14 23:55:39,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 470 transitions. [2019-10-14 23:55:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 23:55:39,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:39,548 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:55:39,548 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1680131208, now seen corresponding path program 1 times [2019-10-14 23:55:39,549 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:39,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006147553] [2019-10-14 23:55:39,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:39,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:39,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:39,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006147553] [2019-10-14 23:55:39,766 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:39,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:39,767 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089511999] [2019-10-14 23:55:39,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:39,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:39,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:39,771 INFO L87 Difference]: Start difference. First operand 318 states and 470 transitions. Second operand 3 states. [2019-10-14 23:55:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:40,334 INFO L93 Difference]: Finished difference Result 920 states and 1379 transitions. [2019-10-14 23:55:40,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:40,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2019-10-14 23:55:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:40,341 INFO L225 Difference]: With dead ends: 920 [2019-10-14 23:55:40,341 INFO L226 Difference]: Without dead ends: 608 [2019-10-14 23:55:40,343 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 23:55:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2019-10-14 23:55:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2019-10-14 23:55:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2019-10-14 23:55:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 876 transitions. [2019-10-14 23:55:40,391 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 876 transitions. Word has length 158 [2019-10-14 23:55:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:40,392 INFO L462 AbstractCegarLoop]: Abstraction has 608 states and 876 transitions. [2019-10-14 23:55:40,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 876 transitions. [2019-10-14 23:55:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 23:55:40,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:40,400 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 23:55:40,400 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:40,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1145003293, now seen corresponding path program 1 times [2019-10-14 23:55:40,401 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:40,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069951081] [2019-10-14 23:55:40,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:40,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:40,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:40,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069951081] [2019-10-14 23:55:40,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197479455] [2019-10-14 23:55:40,741 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 23:55:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:40,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:40,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:41,047 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:41,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1805934513] [2019-10-14 23:55:41,240 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 231 [2019-10-14 23:55:41,327 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:41,327 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)