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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:03:44,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:03:44,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:03:44,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:03:44,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:03:44,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:03:44,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:03:44,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:03:45,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:03:45,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:03:45,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:03:45,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:03:45,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:03:45,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:03:45,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:03:45,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:03:45,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:03:45,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:03:45,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:03:45,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:03:45,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:03:45,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:03:45,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:03:45,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:03:45,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:03:45,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:03:45,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:03:45,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:03:45,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:03:45,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:03:45,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:03:45,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:03:45,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:03:45,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:03:45,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:03:45,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:03:45,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:03:45,074 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:03:45,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:03:45,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:03:45,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:03:45,078 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:03:45,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:03:45,078 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:03:45,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:03:45,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:03:45,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:03:45,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:03:45,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:03:45,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:03:45,081 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:03:45,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:03:45,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:03:45,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:03:45,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:03:45,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:03:45,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:03:45,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:03:45,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:45,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:03:45,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:03:45,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:03:45,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:03:45,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:03:45,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:03:45,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:03:45,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:03:45,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:03:45,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:03:45,381 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:03:45,381 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:03:45,382 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-14 22:03:45,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b997655aa/889ae96ce3fa401ebfaf80a8141dff3b/FLAGc27c1da9e [2019-10-14 22:03:46,087 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:03:46,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-14 22:03:46,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b997655aa/889ae96ce3fa401ebfaf80a8141dff3b/FLAGc27c1da9e [2019-10-14 22:03:46,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b997655aa/889ae96ce3fa401ebfaf80a8141dff3b [2019-10-14 22:03:46,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:03:46,362 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:03:46,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:46,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:03:46,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:03:46,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:46" (1/1) ... [2019-10-14 22:03:46,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1168eabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:46, skipping insertion in model container [2019-10-14 22:03:46,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:46" (1/1) ... [2019-10-14 22:03:46,378 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:03:46,441 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:03:47,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:47,248 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:03:47,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:47,825 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:03:47,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47 WrapperNode [2019-10-14 22:03:47,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:47,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:03:47,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:03:47,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:03:47,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (1/1) ... [2019-10-14 22:03:47,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (1/1) ... [2019-10-14 22:03:47,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (1/1) ... [2019-10-14 22:03:47,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (1/1) ... [2019-10-14 22:03:47,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (1/1) ... [2019-10-14 22:03:47,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (1/1) ... [2019-10-14 22:03:48,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (1/1) ... [2019-10-14 22:03:48,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:03:48,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:03:48,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:03:48,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:03:48,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:03:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:03:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:03:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:03:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:03:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:03:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:03:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:03:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:03:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:03:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:03:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:03:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:03:50,408 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:03:50,409 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:03:50,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:50 BoogieIcfgContainer [2019-10-14 22:03:50,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:03:50,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:03:50,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:03:50,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:03:50,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:03:46" (1/3) ... [2019-10-14 22:03:50,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47defb14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:50, skipping insertion in model container [2019-10-14 22:03:50,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:47" (2/3) ... [2019-10-14 22:03:50,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47defb14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:50, skipping insertion in model container [2019-10-14 22:03:50,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:50" (3/3) ... [2019-10-14 22:03:50,426 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-10-14 22:03:50,439 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:03:50,449 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:03:50,461 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:03:50,507 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:03:50,508 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:03:50,508 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:03:50,508 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:03:50,508 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:03:50,508 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:03:50,509 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:03:50,509 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:03:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:03:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 22:03:50,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:50,565 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:50,568 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash -586545963, now seen corresponding path program 1 times [2019-10-14 22:03:50,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:50,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275401021] [2019-10-14 22:03:50,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:50,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:50,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:51,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275401021] [2019-10-14 22:03:51,044 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:51,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:03:51,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556615754] [2019-10-14 22:03:51,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:51,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:51,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:51,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:03:51,071 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:03:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:55,996 INFO L93 Difference]: Finished difference Result 1515 states and 2847 transitions. [2019-10-14 22:03:56,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:56,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2019-10-14 22:03:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:56,029 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:03:56,029 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:03:56,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:03:56,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:03:56,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:03:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1629 transitions. [2019-10-14 22:03:56,158 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1629 transitions. Word has length 60 [2019-10-14 22:03:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:56,159 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1629 transitions. [2019-10-14 22:03:56,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1629 transitions. [2019-10-14 22:03:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 22:03:56,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:56,167 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, 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] [2019-10-14 22:03:56,168 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1735550147, now seen corresponding path program 1 times [2019-10-14 22:03:56,169 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:56,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350121332] [2019-10-14 22:03:56,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:56,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:56,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:56,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350121332] [2019-10-14 22:03:56,481 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:56,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:03:56,482 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300427602] [2019-10-14 22:03:56,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:56,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:56,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:56,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:56,488 INFO L87 Difference]: Start difference. First operand 1031 states and 1629 transitions. Second operand 8 states. [2019-10-14 22:04:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:04,290 INFO L93 Difference]: Finished difference Result 3898 states and 6463 transitions. [2019-10-14 22:04:04,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:04:04,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2019-10-14 22:04:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:04,317 INFO L225 Difference]: With dead ends: 3898 [2019-10-14 22:04:04,317 INFO L226 Difference]: Without dead ends: 2873 [2019-10-14 22:04:04,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:04:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2019-10-14 22:04:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2811. [2019-10-14 22:04:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2019-10-14 22:04:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4308 transitions. [2019-10-14 22:04:04,434 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4308 transitions. Word has length 135 [2019-10-14 22:04:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:04,435 INFO L462 AbstractCegarLoop]: Abstraction has 2811 states and 4308 transitions. [2019-10-14 22:04:04,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:04:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4308 transitions. [2019-10-14 22:04:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-14 22:04:04,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:04,441 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, 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] [2019-10-14 22:04:04,442 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:04,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:04,442 INFO L82 PathProgramCache]: Analyzing trace with hash -98267403, now seen corresponding path program 1 times [2019-10-14 22:04:04,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:04,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458509260] [2019-10-14 22:04:04,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:04,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:04,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:04,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458509260] [2019-10-14 22:04:04,712 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:04,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:04,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718451487] [2019-10-14 22:04:04,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:04,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:04,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:04,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:04,723 INFO L87 Difference]: Start difference. First operand 2811 states and 4308 transitions. Second operand 9 states. [2019-10-14 22:04:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:10,346 INFO L93 Difference]: Finished difference Result 9864 states and 15975 transitions. [2019-10-14 22:04:10,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:04:10,348 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 139 [2019-10-14 22:04:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:10,393 INFO L225 Difference]: With dead ends: 9864 [2019-10-14 22:04:10,393 INFO L226 Difference]: Without dead ends: 7059 [2019-10-14 22:04:10,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:04:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2019-10-14 22:04:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7025. [2019-10-14 22:04:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7025 states. [2019-10-14 22:04:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7025 states to 7025 states and 10407 transitions. [2019-10-14 22:04:10,663 INFO L78 Accepts]: Start accepts. Automaton has 7025 states and 10407 transitions. Word has length 139 [2019-10-14 22:04:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:10,664 INFO L462 AbstractCegarLoop]: Abstraction has 7025 states and 10407 transitions. [2019-10-14 22:04:10,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7025 states and 10407 transitions. [2019-10-14 22:04:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-14 22:04:10,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:10,680 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:10,680 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash 396142693, now seen corresponding path program 1 times [2019-10-14 22:04:10,681 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:10,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828288489] [2019-10-14 22:04:10,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:10,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:10,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:04:11,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828288489] [2019-10-14 22:04:11,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144812103] [2019-10-14 22:04:11,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:11,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:11,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:11,396 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:11,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:04:11,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617375429] [2019-10-14 22:04:11,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:11,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:11,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:11,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:11,400 INFO L87 Difference]: Start difference. First operand 7025 states and 10407 transitions. Second operand 11 states. [2019-10-14 22:04:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:16,109 INFO L93 Difference]: Finished difference Result 17510 states and 26759 transitions. [2019-10-14 22:04:16,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:04:16,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 234 [2019-10-14 22:04:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:16,167 INFO L225 Difference]: With dead ends: 17510 [2019-10-14 22:04:16,167 INFO L226 Difference]: Without dead ends: 10491 [2019-10-14 22:04:16,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:04:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2019-10-14 22:04:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 8063. [2019-10-14 22:04:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8063 states. [2019-10-14 22:04:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8063 states to 8063 states and 11784 transitions. [2019-10-14 22:04:16,488 INFO L78 Accepts]: Start accepts. Automaton has 8063 states and 11784 transitions. Word has length 234 [2019-10-14 22:04:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:16,490 INFO L462 AbstractCegarLoop]: Abstraction has 8063 states and 11784 transitions. [2019-10-14 22:04:16,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:04:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 8063 states and 11784 transitions. [2019-10-14 22:04:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-10-14 22:04:16,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:16,497 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:16,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:16,711 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:16,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1136292925, now seen corresponding path program 1 times [2019-10-14 22:04:16,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:16,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254507356] [2019-10-14 22:04:16,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:16,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:16,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 106 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:17,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254507356] [2019-10-14 22:04:17,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905887734] [2019-10-14 22:04:17,237 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 [2019-10-14 22:04:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:17,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:17,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 22:04:17,494 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:17,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:17,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157582876] [2019-10-14 22:04:17,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:17,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:17,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:17,496 INFO L87 Difference]: Start difference. First operand 8063 states and 11784 transitions. Second operand 5 states. [2019-10-14 22:04:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:20,392 INFO L93 Difference]: Finished difference Result 18225 states and 26754 transitions. [2019-10-14 22:04:20,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:04:20,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2019-10-14 22:04:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:20,477 INFO L225 Difference]: With dead ends: 18225 [2019-10-14 22:04:20,478 INFO L226 Difference]: Without dead ends: 10168 [2019-10-14 22:04:20,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10168 states. [2019-10-14 22:04:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10168 to 9101. [2019-10-14 22:04:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9101 states. [2019-10-14 22:04:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9101 states to 9101 states and 12176 transitions. [2019-10-14 22:04:20,872 INFO L78 Accepts]: Start accepts. Automaton has 9101 states and 12176 transitions. Word has length 310 [2019-10-14 22:04:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:20,874 INFO L462 AbstractCegarLoop]: Abstraction has 9101 states and 12176 transitions. [2019-10-14 22:04:20,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9101 states and 12176 transitions. [2019-10-14 22:04:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-10-14 22:04:20,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:20,894 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:21,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:21,105 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1283701567, now seen corresponding path program 1 times [2019-10-14 22:04:21,106 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:21,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34018590] [2019-10-14 22:04:21,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:04:21,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34018590] [2019-10-14 22:04:21,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244811593] [2019-10-14 22:04:21,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:21,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:21,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:22,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:22,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:22,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193454977] [2019-10-14 22:04:22,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:22,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:22,146 INFO L87 Difference]: Start difference. First operand 9101 states and 12176 transitions. Second operand 11 states.