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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:02:02,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:02:02,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:02:02,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:02:02,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:02:02,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:02:02,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:02:02,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:02:02,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:02:02,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:02:02,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:02:02,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:02:02,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:02:02,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:02:02,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:02:02,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:02:02,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:02:02,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:02:02,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:02:02,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:02:02,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:02:02,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:02:02,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:02:02,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:02:02,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:02:02,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:02:02,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:02:02,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:02:02,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:02:02,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:02:02,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:02:02,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:02:02,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:02:02,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:02:02,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:02:02,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:02:02,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:02:02,567 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:02:02,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:02:02,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:02:02,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:02:02,571 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:02:02,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:02:02,571 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:02:02,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:02:02,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:02:02,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:02:02,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:02:02,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:02:02,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:02:02,573 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:02:02,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:02:02,574 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:02:02,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:02:02,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:02:02,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:02:02,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:02:02,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:02:02,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:02:02,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:02:02,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:02:02,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:02:02,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:02:02,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:02:02,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:02:02,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:02:02,895 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:02:02,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:02:02,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:02:02,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:02:02,915 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:02:02,916 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-13 20:02:02,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd17de1c7/a4a9a5cd117e422d88f262f0d32407dd/FLAG702ec195f [2019-10-13 20:02:03,597 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:02:03,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-13 20:02:03,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd17de1c7/a4a9a5cd117e422d88f262f0d32407dd/FLAG702ec195f [2019-10-13 20:02:03,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd17de1c7/a4a9a5cd117e422d88f262f0d32407dd [2019-10-13 20:02:03,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:02:03,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:02:03,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:02:03,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:02:03,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:02:03,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:03" (1/1) ... [2019-10-13 20:02:03,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5a7a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:03, skipping insertion in model container [2019-10-13 20:02:03,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:03" (1/1) ... [2019-10-13 20:02:03,946 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:02:04,002 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:02:04,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:02:04,495 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:02:04,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:02:04,726 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:02:04,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04 WrapperNode [2019-10-13 20:02:04,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:02:04,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:02:04,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:02:04,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:02:04,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:02:04,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:02:04,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:02:04,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:02:04,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:02:04,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:02:04,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:02:04,911 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:02:04,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:02:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:02:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:02:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:02:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:02:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:02:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:02:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:02:06,138 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:02:06,138 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:02:06,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:06 BoogieIcfgContainer [2019-10-13 20:02:06,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:02:06,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:02:06,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:02:06,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:02:06,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:02:03" (1/3) ... [2019-10-13 20:02:06,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89a866c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:06, skipping insertion in model container [2019-10-13 20:02:06,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (2/3) ... [2019-10-13 20:02:06,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89a866c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:06, skipping insertion in model container [2019-10-13 20:02:06,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:06" (3/3) ... [2019-10-13 20:02:06,148 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label24.c [2019-10-13 20:02:06,158 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:02:06,167 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:02:06,180 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:02:06,211 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:02:06,211 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:02:06,211 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:02:06,212 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:02:06,212 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:02:06,212 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:02:06,212 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:02:06,212 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:02:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 20:02:06,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 20:02:06,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:06,247 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] [2019-10-13 20:02:06,248 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:06,256 INFO L82 PathProgramCache]: Analyzing trace with hash 894573055, now seen corresponding path program 1 times [2019-10-13 20:02:06,267 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:06,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017244497] [2019-10-13 20:02:06,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:06,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:06,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:06,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017244497] [2019-10-13 20:02:06,497 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:06,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:02:06,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541893942] [2019-10-13 20:02:06,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:02:06,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:02:06,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:02:06,522 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-13 20:02:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:07,634 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-13 20:02:07,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:02:07,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-13 20:02:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:07,665 INFO L225 Difference]: With dead ends: 571 [2019-10-13 20:02:07,665 INFO L226 Difference]: Without dead ends: 294 [2019-10-13 20:02:07,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:02:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-13 20:02:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-13 20:02:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-13 20:02:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2019-10-13 20:02:07,756 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 20 [2019-10-13 20:02:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:07,756 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2019-10-13 20:02:07,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:02:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2019-10-13 20:02:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 20:02:07,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:07,761 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:02:07,761 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:07,762 INFO L82 PathProgramCache]: Analyzing trace with hash 892965265, now seen corresponding path program 1 times [2019-10-13 20:02:07,762 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:07,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718689670] [2019-10-13 20:02:07,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:07,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:07,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:08,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718689670] [2019-10-13 20:02:08,020 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:08,021 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:02:08,021 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250506780] [2019-10-13 20:02:08,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:02:08,023 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:08,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:02:08,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:02:08,024 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand 6 states. [2019-10-13 20:02:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:08,934 INFO L93 Difference]: Finished difference Result 741 states and 1061 transitions. [2019-10-13 20:02:08,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:02:08,935 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-10-13 20:02:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:08,941 INFO L225 Difference]: With dead ends: 741 [2019-10-13 20:02:08,941 INFO L226 Difference]: Without dead ends: 453 [2019-10-13 20:02:08,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:02:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-13 20:02:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-13 20:02:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-13 20:02:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2019-10-13 20:02:08,984 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 89 [2019-10-13 20:02:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:08,985 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2019-10-13 20:02:08,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:02:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2019-10-13 20:02:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 20:02:08,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:08,989 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:02:08,989 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash 712402589, now seen corresponding path program 1 times [2019-10-13 20:02:08,990 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:08,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683973127] [2019-10-13 20:02:08,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:08,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:08,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:09,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683973127] [2019-10-13 20:02:09,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:09,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:02:09,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344900149] [2019-10-13 20:02:09,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:02:09,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:09,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:02:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:02:09,158 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand 4 states. [2019-10-13 20:02:10,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:10,303 INFO L93 Difference]: Finished difference Result 1609 states and 2232 transitions. [2019-10-13 20:02:10,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:02:10,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-10-13 20:02:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:10,312 INFO L225 Difference]: With dead ends: 1609 [2019-10-13 20:02:10,312 INFO L226 Difference]: Without dead ends: 735 [2019-10-13 20:02:10,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:02:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-13 20:02:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 592. [2019-10-13 20:02:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-13 20:02:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 801 transitions. [2019-10-13 20:02:10,363 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 801 transitions. Word has length 99 [2019-10-13 20:02:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:10,364 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 801 transitions. [2019-10-13 20:02:10,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:02:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 801 transitions. [2019-10-13 20:02:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 20:02:10,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:10,376 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:02:10,376 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:10,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:10,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1290039418, now seen corresponding path program 1 times [2019-10-13 20:02:10,377 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:10,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41128563] [2019-10-13 20:02:10,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:10,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:10,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:10,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41128563] [2019-10-13 20:02:10,557 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:10,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:02:10,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815532395] [2019-10-13 20:02:10,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:02:10,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:02:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:02:10,559 INFO L87 Difference]: Start difference. First operand 592 states and 801 transitions. Second operand 6 states. [2019-10-13 20:02:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:11,514 INFO L93 Difference]: Finished difference Result 1492 states and 2064 transitions. [2019-10-13 20:02:11,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:02:11,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-13 20:02:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:11,522 INFO L225 Difference]: With dead ends: 1492 [2019-10-13 20:02:11,523 INFO L226 Difference]: Without dead ends: 906 [2019-10-13 20:02:11,525 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 [2019-10-13 20:02:11,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-10-13 20:02:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 890. [2019-10-13 20:02:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-13 20:02:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1141 transitions. [2019-10-13 20:02:11,561 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1141 transitions. Word has length 142 [2019-10-13 20:02:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:11,562 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1141 transitions. [2019-10-13 20:02:11,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:02:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1141 transitions. [2019-10-13 20:02:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-13 20:02:11,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:11,567 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:02:11,568 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1377962712, now seen corresponding path program 1 times [2019-10-13 20:02:11,568 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:11,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698853128] [2019-10-13 20:02:11,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:11,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:11,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:11,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698853128] [2019-10-13 20:02:11,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320903413] [2019-10-13 20:02:11,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:02:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:11,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:02:11,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:02:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 20:02:12,004 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:02:12,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:02:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:02:12,329 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:02:12,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-13 20:02:12,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508842739] [2019-10-13 20:02:12,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:02:12,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:02:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:02:12,332 INFO L87 Difference]: Start difference. First operand 890 states and 1141 transitions. Second operand 5 states. [2019-10-13 20:02:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:13,227 INFO L93 Difference]: Finished difference Result 1943 states and 2493 transitions. [2019-10-13 20:02:13,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:02:13,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2019-10-13 20:02:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:13,235 INFO L225 Difference]: With dead ends: 1943 [2019-10-13 20:02:13,235 INFO L226 Difference]: Without dead ends: 1059 [2019-10-13 20:02:13,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:02:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2019-10-13 20:02:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1047. [2019-10-13 20:02:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-10-13 20:02:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1325 transitions. [2019-10-13 20:02:13,295 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1325 transitions. Word has length 189 [2019-10-13 20:02:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:13,296 INFO L462 AbstractCegarLoop]: Abstraction has 1047 states and 1325 transitions. [2019-10-13 20:02:13,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:02:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1325 transitions. [2019-10-13 20:02:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-13 20:02:13,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:13,305 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:02:13,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:02:13,512 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -608870379, now seen corresponding path program 1 times [2019-10-13 20:02:13,514 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:13,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521392948] [2019-10-13 20:02:13,517 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:13,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:13,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 111 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-13 20:02:14,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521392948] [2019-10-13 20:02:14,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325286304] [2019-10-13 20:02:14,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:02:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:14,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:02:14,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:02:14,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:02:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 20:02:14,635 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:02:14,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:02:14,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:02:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 111 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-13 20:02:14,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1447847447] [2019-10-13 20:02:14,987 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 260 [2019-10-13 20:02:15,049 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:02:15,050 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:02:19,397 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.