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/Problem15_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:25,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:25,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:25,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:25,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:25,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:25,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:25,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:25,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:25,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:25,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:25,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:25,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:25,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:25,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:25,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:25,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:25,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:25,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:25,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:25,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:25,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:25,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:25,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:25,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:25,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:07:25,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:07:25,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:07:25,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:07:25,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:07:25,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:07:25,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:07:25,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:07:25,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:25,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:25,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:25,467 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 [2019-10-15 00:07:25,481 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:25,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:25,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:25,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:25,483 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:25,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:25,484 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:25,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:25,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:25,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:25,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:25,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:25,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:25,485 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:25,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:25,485 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:25,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:25,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:25,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:25,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:25,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:25,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:25,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:25,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:25,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:25,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:25,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:25,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:25,488 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 [2019-10-15 00:07:25,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:25,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:25,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:25,802 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:25,802 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:25,803 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label34.c [2019-10-15 00:07:25,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f204a0e1b/905d2e2e09834eedadc781f231595055/FLAG2a0779750 [2019-10-15 00:07:26,573 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:26,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label34.c [2019-10-15 00:07:26,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f204a0e1b/905d2e2e09834eedadc781f231595055/FLAG2a0779750 [2019-10-15 00:07:26,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f204a0e1b/905d2e2e09834eedadc781f231595055 [2019-10-15 00:07:26,701 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:26,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:26,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:26,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:26,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:26,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:26" (1/1) ... [2019-10-15 00:07:26,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb0478c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:26, skipping insertion in model container [2019-10-15 00:07:26,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:26" (1/1) ... [2019-10-15 00:07:26,722 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:26,810 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:27,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:27,735 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:28,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:28,038 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:28,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28 WrapperNode [2019-10-15 00:07:28,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:28,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:28,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:28,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:28,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (1/1) ... [2019-10-15 00:07:28,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (1/1) ... [2019-10-15 00:07:28,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (1/1) ... [2019-10-15 00:07:28,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (1/1) ... [2019-10-15 00:07:28,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (1/1) ... [2019-10-15 00:07:28,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (1/1) ... [2019-10-15 00:07:28,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (1/1) ... [2019-10-15 00:07:28,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:28,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:28,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:28,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:28,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (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 [2019-10-15 00:07:28,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:28,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:28,307 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:28,307 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:28,307 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:28,307 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:31,615 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:31,615 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:31,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:31 BoogieIcfgContainer [2019-10-15 00:07:31,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:31,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:31,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:31,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:31,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:26" (1/3) ... [2019-10-15 00:07:31,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ceeb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:31, skipping insertion in model container [2019-10-15 00:07:31,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:28" (2/3) ... [2019-10-15 00:07:31,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ceeb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:31, skipping insertion in model container [2019-10-15 00:07:31,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:31" (3/3) ... [2019-10-15 00:07:31,633 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label34.c [2019-10-15 00:07:31,645 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:31,658 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:31,670 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:31,711 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:31,711 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:31,711 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:31,711 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:31,711 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:31,712 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:31,712 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:31,712 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 00:07:31,745 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:31,746 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:31,748 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:31,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1117771851, now seen corresponding path program 1 times [2019-10-15 00:07:31,764 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:31,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795073125] [2019-10-15 00:07:31,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:31,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:31,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:32,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795073125] [2019-10-15 00:07:32,006 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:32,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:32,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663781468] [2019-10-15 00:07:32,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:32,013 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:32,031 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:38,173 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-15 00:07:38,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:38,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-15 00:07:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:38,206 INFO L225 Difference]: With dead ends: 1554 [2019-10-15 00:07:38,206 INFO L226 Difference]: Without dead ends: 1036 [2019-10-15 00:07:38,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-15 00:07:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1013. [2019-10-15 00:07:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2019-10-15 00:07:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1638 transitions. [2019-10-15 00:07:38,390 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1638 transitions. Word has length 19 [2019-10-15 00:07:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:38,392 INFO L462 AbstractCegarLoop]: Abstraction has 1013 states and 1638 transitions. [2019-10-15 00:07:38,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1638 transitions. [2019-10-15 00:07:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-15 00:07:38,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:38,400 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:38,401 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2035291641, now seen corresponding path program 1 times [2019-10-15 00:07:38,402 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:38,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449666845] [2019-10-15 00:07:38,403 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:38,403 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:38,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:38,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449666845] [2019-10-15 00:07:38,651 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:38,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:38,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145935216] [2019-10-15 00:07:38,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:38,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:38,655 INFO L87 Difference]: Start difference. First operand 1013 states and 1638 transitions. Second operand 5 states. [2019-10-15 00:07:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:42,680 INFO L93 Difference]: Finished difference Result 3003 states and 4930 transitions. [2019-10-15 00:07:42,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:42,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-10-15 00:07:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:42,704 INFO L225 Difference]: With dead ends: 3003 [2019-10-15 00:07:42,704 INFO L226 Difference]: Without dead ends: 1996 [2019-10-15 00:07:42,709 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 [2019-10-15 00:07:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-10-15 00:07:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1958. [2019-10-15 00:07:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1958 states. [2019-10-15 00:07:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2746 transitions. [2019-10-15 00:07:42,806 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2746 transitions. Word has length 91 [2019-10-15 00:07:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:42,807 INFO L462 AbstractCegarLoop]: Abstraction has 1958 states and 2746 transitions. [2019-10-15 00:07:42,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2746 transitions. [2019-10-15 00:07:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 00:07:42,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:42,817 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:42,818 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1222387191, now seen corresponding path program 1 times [2019-10-15 00:07:42,819 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:42,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315457930] [2019-10-15 00:07:42,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:43,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315457930] [2019-10-15 00:07:43,051 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:43,052 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:43,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803298727] [2019-10-15 00:07:43,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:43,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:43,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:43,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:43,054 INFO L87 Difference]: Start difference. First operand 1958 states and 2746 transitions. Second operand 4 states. [2019-10-15 00:07:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:48,465 INFO L93 Difference]: Finished difference Result 7660 states and 10979 transitions. [2019-10-15 00:07:48,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:48,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-10-15 00:07:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:48,492 INFO L225 Difference]: With dead ends: 7660 [2019-10-15 00:07:48,492 INFO L226 Difference]: Without dead ends: 3839 [2019-10-15 00:07:48,502 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 [2019-10-15 00:07:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2019-10-15 00:07:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3839. [2019-10-15 00:07:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3839 states. [2019-10-15 00:07:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 5043 transitions. [2019-10-15 00:07:48,603 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 5043 transitions. Word has length 99 [2019-10-15 00:07:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:48,604 INFO L462 AbstractCegarLoop]: Abstraction has 3839 states and 5043 transitions. [2019-10-15 00:07:48,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 5043 transitions. [2019-10-15 00:07:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 00:07:48,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:48,607 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 00:07:48,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash -23489459, now seen corresponding path program 1 times [2019-10-15 00:07:48,608 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:48,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887253090] [2019-10-15 00:07:48,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:48,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:48,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:48,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887253090] [2019-10-15 00:07:48,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957263437] [2019-10-15 00:07:48,778 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 [2019-10-15 00:07:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:48,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:07:48,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:49,001 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:49,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [441426293] [2019-10-15 00:07:49,250 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 172 [2019-10-15 00:07:49,314 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:07:49,314 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:07:50,962 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:07:50,964 INFO L272 AbstractInterpreter]: Visited 85 different actions 85 times. Never merged. Never widened. Performed 209 root evaluator evaluations with a maximum evaluation depth of 12. Performed 209 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:07:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:50,969 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:07:52,092 INFO L227 lantSequenceWeakener]: Weakened 152 states. On average, predicates are now at 77.49% of their original sizes. [2019-10-15 00:07:52,093 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:07:52,172 INFO L553 sIntCurrentIteration]: We unified 170 AI predicates to 170 [2019-10-15 00:07:52,172 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:07:52,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:07:52,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 5] total 20 [2019-10-15 00:07:52,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933440317] [2019-10-15 00:07:52,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 00:07:52,175 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:52,175 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:07:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 00:07:52,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:07:52,176 INFO L87 Difference]: Start difference. First operand 3839 states and 5043 transitions. Second operand 10 states.