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/Problem10_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:00:56,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:00:56,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:00:56,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:00:56,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:00:56,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:00:56,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:00:56,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:00:56,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:00:56,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:00:56,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:00:56,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:00:56,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:00:56,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:00:56,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:00:56,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:00:56,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:00:56,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:00:56,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:00:56,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:00:56,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:00:56,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:00:56,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:00:56,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:00:56,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 00:00:56,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 00:00:56,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 00:00:56,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 00:00:56,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 00:00:56,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 00:00:56,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:00:56,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:00:56,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:00:56,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:00:56,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:00:56,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:00:56,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:00:56,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:00:56,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:00:56,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:00:56,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:00:56,402 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 00:00:56,418 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:00:56,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:00:56,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:00:56,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:00:56,420 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:00:56,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:00:56,421 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:00:56,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:00:56,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:00:56,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:00:56,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:00:56,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:00:56,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:00:56,422 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:00:56,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:00:56,422 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:00:56,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:00:56,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:00:56,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:00:56,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:00:56,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:00:56,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:56,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:00:56,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:00:56,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:00:56,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:00:56,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:00:56,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:00:56,425 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 00:00:56,738 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:00:56,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:00:56,763 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:00:56,764 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:00:56,765 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:00:56,766 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label20.c [2019-10-15 00:00:56,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6841acd3/80b8525c31124bfaa67e2cd3d2d012f3/FLAG82f0746ce [2019-10-15 00:00:57,436 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:00:57,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label20.c [2019-10-15 00:00:57,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6841acd3/80b8525c31124bfaa67e2cd3d2d012f3/FLAG82f0746ce [2019-10-15 00:00:57,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6841acd3/80b8525c31124bfaa67e2cd3d2d012f3 [2019-10-15 00:00:57,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:00:57,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:00:57,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:57,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:00:57,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:00:57,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2022d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:57, skipping insertion in model container [2019-10-15 00:00:57,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,718 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:00:57,781 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:00:58,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:58,208 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:00:58,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:58,473 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:00:58,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58 WrapperNode [2019-10-15 00:00:58,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:58,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:00:58,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:00:58,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:00:58,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:00:58,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:00:58,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:00:58,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:00:58,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (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 00:00:58,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:00:58,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:00:58,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:00:58,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:00:58,666 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:00:58,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:00:58,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:00:58,667 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:00:58,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:00:58,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:00:58,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:00:59,990 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:00:59,991 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:00:59,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:59 BoogieIcfgContainer [2019-10-15 00:00:59,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:00:59,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:00:59,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:00:59,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:00:59,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:57" (1/3) ... [2019-10-15 00:00:59,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d408a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:59, skipping insertion in model container [2019-10-15 00:00:59,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (2/3) ... [2019-10-15 00:01:00,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d408a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:59, skipping insertion in model container [2019-10-15 00:01:00,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:59" (3/3) ... [2019-10-15 00:01:00,002 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label20.c [2019-10-15 00:01:00,012 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:01:00,022 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:01:00,035 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:01:00,064 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:01:00,064 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:01:00,064 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:01:00,065 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:01:00,065 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:01:00,065 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:01:00,065 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:01:00,065 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:01:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:01:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 00:01:00,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:00,102 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] [2019-10-15 00:01:00,105 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash 92787543, now seen corresponding path program 1 times [2019-10-15 00:01:00,121 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:00,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202334897] [2019-10-15 00:01:00,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:00,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:00,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:00,459 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 00:01:00,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202334897] [2019-10-15 00:01:00,460 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:00,461 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:01:00,461 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615252481] [2019-10-15 00:01:00,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:01:00,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:00,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:01:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:01:00,487 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:01:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:01,557 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:01:01,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:01:01,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-15 00:01:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:01,587 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:01:01,588 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:01:01,594 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 [2019-10-15 00:01:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:01:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:01:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:01:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:01:01,682 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 34 [2019-10-15 00:01:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:01,683 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:01:01,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:01:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:01:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 00:01:01,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:01,689 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:01,690 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:01,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1040118654, now seen corresponding path program 1 times [2019-10-15 00:01:01,690 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:01,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348269212] [2019-10-15 00:01:01,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:01,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:01,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:01,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348269212] [2019-10-15 00:01:01,893 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:01,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:01:01,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144610166] [2019-10-15 00:01:01,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:01:01,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:01,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:01:01,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:01:01,897 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-15 00:01:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:02,908 INFO L93 Difference]: Finished difference Result 890 states and 1368 transitions. [2019-10-15 00:01:02,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:01:02,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2019-10-15 00:01:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:02,915 INFO L225 Difference]: With dead ends: 890 [2019-10-15 00:01:02,916 INFO L226 Difference]: Without dead ends: 602 [2019-10-15 00:01:02,918 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 00:01:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-10-15 00:01:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 592. [2019-10-15 00:01:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-15 00:01:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 867 transitions. [2019-10-15 00:01:02,966 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 867 transitions. Word has length 116 [2019-10-15 00:01:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:02,967 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 867 transitions. [2019-10-15 00:01:02,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 867 transitions. [2019-10-15 00:01:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:01:02,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:02,971 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:02,971 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1447998306, now seen corresponding path program 1 times [2019-10-15 00:01:02,972 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:02,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114792255] [2019-10-15 00:01:02,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:02,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:02,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:03,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114792255] [2019-10-15 00:01:03,130 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:03,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:03,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627643411] [2019-10-15 00:01:03,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:03,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:03,133 INFO L87 Difference]: Start difference. First operand 592 states and 867 transitions. Second operand 6 states. [2019-10-15 00:01:04,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:04,113 INFO L93 Difference]: Finished difference Result 1490 states and 2245 transitions. [2019-10-15 00:01:04,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:04,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-10-15 00:01:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:04,121 INFO L225 Difference]: With dead ends: 1490 [2019-10-15 00:01:04,121 INFO L226 Difference]: Without dead ends: 904 [2019-10-15 00:01:04,124 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 [2019-10-15 00:01:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-10-15 00:01:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 890. [2019-10-15 00:01:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-15 00:01:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1300 transitions. [2019-10-15 00:01:04,174 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1300 transitions. Word has length 132 [2019-10-15 00:01:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:04,175 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1300 transitions. [2019-10-15 00:01:04,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1300 transitions. [2019-10-15 00:01:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 00:01:04,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:04,181 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:04,181 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:04,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1418096050, now seen corresponding path program 1 times [2019-10-15 00:01:04,182 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:04,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006391743] [2019-10-15 00:01:04,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:04,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:04,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:04,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006391743] [2019-10-15 00:01:04,433 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:04,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:04,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100349854] [2019-10-15 00:01:04,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:04,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:04,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:04,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:04,435 INFO L87 Difference]: Start difference. First operand 890 states and 1300 transitions. Second operand 6 states. [2019-10-15 00:01:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:05,383 INFO L93 Difference]: Finished difference Result 2104 states and 3183 transitions. [2019-10-15 00:01:05,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:05,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-10-15 00:01:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:05,394 INFO L225 Difference]: With dead ends: 2104 [2019-10-15 00:01:05,395 INFO L226 Difference]: Without dead ends: 1220 [2019-10-15 00:01:05,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2019-10-15 00:01:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1192. [2019-10-15 00:01:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-15 00:01:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1616 transitions. [2019-10-15 00:01:05,474 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1616 transitions. Word has length 156 [2019-10-15 00:01:05,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:05,476 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1616 transitions. [2019-10-15 00:01:05,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:05,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1616 transitions. [2019-10-15 00:01:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-15 00:01:05,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:05,483 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:01:05,483 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2147027456, now seen corresponding path program 1 times [2019-10-15 00:01:05,484 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:05,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241299414] [2019-10-15 00:01:05,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:06,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241299414] [2019-10-15 00:01:06,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491719064] [2019-10-15 00:01:06,012 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 00:01:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:06,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:06,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:06,246 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:06,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2086290000] [2019-10-15 00:01:06,425 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 196 [2019-10-15 00:01:06,475 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:06,475 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:01:18,481 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 00:01:34,423 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:01:34,425 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 16. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:01:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:34,429 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates