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/Problem16_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:09:16,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:09:16,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:09:16,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:09:16,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:09:16,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:09:16,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:09:16,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:09:16,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:09:16,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:09:16,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:09:16,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:09:16,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:09:16,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:09:16,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:09:16,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:09:16,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:09:16,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:09:16,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:09:16,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:09:16,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:09:16,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:09:16,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:09:16,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:09:16,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:09:16,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:09:16,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:09:16,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:09:16,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:09:16,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:09:16,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:09:16,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:09:16,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:09:16,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:09:16,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:09:16,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:09:16,090 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 20:09:16,105 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:09:16,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:09:16,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:09:16,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:09:16,106 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:09:16,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:09:16,107 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:09:16,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:09:16,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:09:16,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:09:16,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:09:16,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:09:16,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:09:16,108 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:09:16,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:09:16,109 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:09:16,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:09:16,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:09:16,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:09:16,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:09:16,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:09:16,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:09:16,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:09:16,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:09:16,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:09:16,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:09:16,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:09:16,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:09:16,111 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 20:09:16,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:09:16,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:09:16,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:09:16,417 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:09:16,417 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:09:16,418 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-10-13 20:09:16,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84219cd2b/568c06e4be6c4b929c048a16f63a0d14/FLAG3005daadb [2019-10-13 20:09:17,207 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:09:17,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-10-13 20:09:17,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84219cd2b/568c06e4be6c4b929c048a16f63a0d14/FLAG3005daadb [2019-10-13 20:09:17,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84219cd2b/568c06e4be6c4b929c048a16f63a0d14 [2019-10-13 20:09:17,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:09:17,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:09:17,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:17,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:09:17,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:09:17,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:17" (1/1) ... [2019-10-13 20:09:17,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:17, skipping insertion in model container [2019-10-13 20:09:17,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:17" (1/1) ... [2019-10-13 20:09:17,427 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:09:17,529 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:09:18,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:18,311 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:09:18,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:18,741 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:09:18,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18 WrapperNode [2019-10-13 20:09:18,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:18,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:09:18,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:09:18,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:09:18,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (1/1) ... [2019-10-13 20:09:18,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (1/1) ... [2019-10-13 20:09:18,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (1/1) ... [2019-10-13 20:09:18,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (1/1) ... [2019-10-13 20:09:18,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (1/1) ... [2019-10-13 20:09:18,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (1/1) ... [2019-10-13 20:09:18,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (1/1) ... [2019-10-13 20:09:18,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:09:18,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:09:18,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:09:18,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:09:18,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (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 20:09:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:09:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:09:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:09:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:09:19,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:09:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:09:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:09:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:09:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:09:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:09:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:09:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:09:19,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:09:21,486 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:09:21,486 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:09:21,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:21 BoogieIcfgContainer [2019-10-13 20:09:21,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:09:21,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:09:21,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:09:21,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:09:21,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:17" (1/3) ... [2019-10-13 20:09:21,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22681042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:21, skipping insertion in model container [2019-10-13 20:09:21,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:18" (2/3) ... [2019-10-13 20:09:21,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22681042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:21, skipping insertion in model container [2019-10-13 20:09:21,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:21" (3/3) ... [2019-10-13 20:09:21,499 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label16.c [2019-10-13 20:09:21,511 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:09:21,521 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:09:21,536 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:09:21,568 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:09:21,568 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:09:21,568 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:09:21,569 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:09:21,569 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:09:21,569 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:09:21,569 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:09:21,569 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:09:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:09:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 20:09:21,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:21,615 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:21,617 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1899898085, now seen corresponding path program 1 times [2019-10-13 20:09:21,635 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:21,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292987105] [2019-10-13 20:09:21,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:21,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:21,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:21,992 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 20:09:21,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292987105] [2019-10-13 20:09:21,993 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:21,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:09:21,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622547273] [2019-10-13 20:09:21,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:09:22,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:22,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:09:22,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:22,019 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:09:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:24,401 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:09:24,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:09:24,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-10-13 20:09:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:24,431 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:09:24,431 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:09:24,442 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 [2019-10-13 20:09:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:09:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:09:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:09:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-10-13 20:09:24,551 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 48 [2019-10-13 20:09:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:24,552 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-10-13 20:09:24,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:09:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-10-13 20:09:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 20:09:24,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:24,559 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, 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] [2019-10-13 20:09:24,559 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:24,560 INFO L82 PathProgramCache]: Analyzing trace with hash 301606541, now seen corresponding path program 1 times [2019-10-13 20:09:24,560 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:24,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270362541] [2019-10-13 20:09:24,560 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:24,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:24,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:24,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270362541] [2019-10-13 20:09:24,834 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:24,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:24,834 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609838120] [2019-10-13 20:09:24,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:24,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:24,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:24,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:24,839 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-10-13 20:09:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:31,384 INFO L93 Difference]: Finished difference Result 2808 states and 4912 transitions. [2019-10-13 20:09:31,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 20:09:31,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-13 20:09:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:31,413 INFO L225 Difference]: With dead ends: 2808 [2019-10-13 20:09:31,413 INFO L226 Difference]: Without dead ends: 2132 [2019-10-13 20:09:31,417 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:09:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2019-10-13 20:09:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2087. [2019-10-13 20:09:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-10-13 20:09:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-10-13 20:09:31,581 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 123 [2019-10-13 20:09:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:31,584 INFO L462 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-10-13 20:09:31,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-10-13 20:09:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 20:09:31,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:31,602 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, 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] [2019-10-13 20:09:31,602 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1614630469, now seen corresponding path program 1 times [2019-10-13 20:09:31,603 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:31,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659618967] [2019-10-13 20:09:31,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:31,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:31,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:31,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659618967] [2019-10-13 20:09:31,836 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:31,836 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:31,836 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586938851] [2019-10-13 20:09:31,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:31,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:31,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:31,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:31,845 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-10-13 20:09:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:34,796 INFO L93 Difference]: Finished difference Result 5623 states and 9425 transitions. [2019-10-13 20:09:34,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:09:34,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-10-13 20:09:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:34,822 INFO L225 Difference]: With dead ends: 5623 [2019-10-13 20:09:34,823 INFO L226 Difference]: Without dead ends: 3542 [2019-10-13 20:09:34,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:09:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-10-13 20:09:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-10-13 20:09:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-10-13 20:09:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5697 transitions. [2019-10-13 20:09:34,940 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5697 transitions. Word has length 127 [2019-10-13 20:09:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:34,941 INFO L462 AbstractCegarLoop]: Abstraction has 3503 states and 5697 transitions. [2019-10-13 20:09:34,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5697 transitions. [2019-10-13 20:09:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 20:09:34,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:34,943 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, 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] [2019-10-13 20:09:34,943 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:34,944 INFO L82 PathProgramCache]: Analyzing trace with hash 939099681, now seen corresponding path program 1 times [2019-10-13 20:09:34,944 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:34,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172070077] [2019-10-13 20:09:34,944 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:34,944 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:34,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:35,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172070077] [2019-10-13 20:09:35,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:35,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:35,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450232415] [2019-10-13 20:09:35,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:35,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:35,119 INFO L87 Difference]: Start difference. First operand 3503 states and 5697 transitions. Second operand 6 states. [2019-10-13 20:09:37,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:37,751 INFO L93 Difference]: Finished difference Result 7817 states and 13132 transitions. [2019-10-13 20:09:37,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:37,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-13 20:09:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:37,785 INFO L225 Difference]: With dead ends: 7817 [2019-10-13 20:09:37,785 INFO L226 Difference]: Without dead ends: 4320 [2019-10-13 20:09:37,798 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 20:09:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2019-10-13 20:09:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 4279. [2019-10-13 20:09:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4279 states. [2019-10-13 20:09:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 6768 transitions. [2019-10-13 20:09:37,935 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 6768 transitions. Word has length 129 [2019-10-13 20:09:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:37,937 INFO L462 AbstractCegarLoop]: Abstraction has 4279 states and 6768 transitions. [2019-10-13 20:09:37,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 6768 transitions. [2019-10-13 20:09:37,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 20:09:37,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:37,941 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, 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] [2019-10-13 20:09:37,942 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1902020488, now seen corresponding path program 1 times [2019-10-13 20:09:37,942 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:37,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574609866] [2019-10-13 20:09:37,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:37,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:37,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:38,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574609866] [2019-10-13 20:09:38,066 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:38,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:38,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401508765] [2019-10-13 20:09:38,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:38,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:38,068 INFO L87 Difference]: Start difference. First operand 4279 states and 6768 transitions. Second operand 6 states. [2019-10-13 20:09:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:40,815 INFO L93 Difference]: Finished difference Result 11663 states and 19030 transitions. [2019-10-13 20:09:40,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:40,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-10-13 20:09:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:40,862 INFO L225 Difference]: With dead ends: 11663 [2019-10-13 20:09:40,862 INFO L226 Difference]: Without dead ends: 7390 [2019-10-13 20:09:40,878 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 20:09:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2019-10-13 20:09:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 7362. [2019-10-13 20:09:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7362 states. [2019-10-13 20:09:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 10905 transitions. [2019-10-13 20:09:41,157 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 10905 transitions. Word has length 132 [2019-10-13 20:09:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:41,158 INFO L462 AbstractCegarLoop]: Abstraction has 7362 states and 10905 transitions. [2019-10-13 20:09:41,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 10905 transitions. [2019-10-13 20:09:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 20:09:41,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:41,160 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, 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] [2019-10-13 20:09:41,160 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1440393839, now seen corresponding path program 1 times [2019-10-13 20:09:41,161 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:41,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086202543] [2019-10-13 20:09:41,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:41,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:41,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:41,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086202543] [2019-10-13 20:09:41,266 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:41,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:41,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308412681] [2019-10-13 20:09:41,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:41,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:41,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:41,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:41,268 INFO L87 Difference]: Start difference. First operand 7362 states and 10905 transitions. Second operand 6 states. [2019-10-13 20:09:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:45,540 INFO L93 Difference]: Finished difference Result 16133 states and 24072 transitions. [2019-10-13 20:09:45,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:45,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-10-13 20:09:45,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:45,595 INFO L225 Difference]: With dead ends: 16133 [2019-10-13 20:09:45,596 INFO L226 Difference]: Without dead ends: 8777 [2019-10-13 20:09:45,617 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 20:09:45,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2019-10-13 20:09:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 7746. [2019-10-13 20:09:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7746 states. [2019-10-13 20:09:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 10527 transitions. [2019-10-13 20:09:45,937 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 10527 transitions. Word has length 137 [2019-10-13 20:09:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:45,938 INFO L462 AbstractCegarLoop]: Abstraction has 7746 states and 10527 transitions. [2019-10-13 20:09:45,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 10527 transitions. [2019-10-13 20:09:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 20:09:45,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:45,948 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, 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] [2019-10-13 20:09:45,948 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash -37681811, now seen corresponding path program 1 times [2019-10-13 20:09:45,949 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:45,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056359783] [2019-10-13 20:09:45,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:45,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:45,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:09:46,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056359783] [2019-10-13 20:09:46,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506427145] [2019-10-13 20:09:46,099 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 20:09:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:46,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:09:46,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:46,268 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:46,318 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:09:46,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 20:09:46,319 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126110935] [2019-10-13 20:09:46,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:09:46,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:46,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:09:46,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:46,321 INFO L87 Difference]: Start difference. First operand 7746 states and 10527 transitions. Second operand 4 states. [2019-10-13 20:09:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:49,785 INFO L93 Difference]: Finished difference Result 22600 states and 31225 transitions. [2019-10-13 20:09:49,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:09:49,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-10-13 20:09:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:49,842 INFO L225 Difference]: With dead ends: 22600 [2019-10-13 20:09:49,842 INFO L226 Difference]: Without dead ends: 14860 [2019-10-13 20:09:49,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14860 states. [2019-10-13 20:09:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14860 to 12439. [2019-10-13 20:09:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12439 states. [2019-10-13 20:09:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12439 states to 12439 states and 16201 transitions. [2019-10-13 20:09:50,216 INFO L78 Accepts]: Start accepts. Automaton has 12439 states and 16201 transitions. Word has length 139 [2019-10-13 20:09:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:50,217 INFO L462 AbstractCegarLoop]: Abstraction has 12439 states and 16201 transitions. [2019-10-13 20:09:50,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:09:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 12439 states and 16201 transitions. [2019-10-13 20:09:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2019-10-13 20:09:50,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:50,242 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:50,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:50,445 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1505126243, now seen corresponding path program 1 times [2019-10-13 20:09:50,447 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:50,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767091193] [2019-10-13 20:09:50,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:50,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:50,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 314 proven. 155 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2019-10-13 20:09:51,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767091193] [2019-10-13 20:09:51,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247151331] [2019-10-13 20:09:51,372 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 20:09:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:51,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:09:51,587 INFO L279 TraceCheckSpWp]: Computing forward predicates...