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/Problem11_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:58:32,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:58:32,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:58:32,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:58:32,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:58:32,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:58:32,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:58:32,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:58:32,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:58:32,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:58:32,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:58:32,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:58:32,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:58:32,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:58:32,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:58:32,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:58:32,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:58:32,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:58:32,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:58:32,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:58:32,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:58:32,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:58:32,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:58:32,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:58:32,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:58:32,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:58:32,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:58:32,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:58:32,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:58:32,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:58:32,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:58:32,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:58:32,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:58:32,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:58:32,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:58:32,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:58:32,543 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 21:58:32,556 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:58:32,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:58:32,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:58:32,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:58:32,558 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:58:32,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:58:32,558 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:58:32,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:58:32,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:58:32,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:58:32,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:58:32,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:58:32,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:58:32,560 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:58:32,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:58:32,560 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:58:32,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:58:32,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:58:32,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:58:32,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:58:32,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:58:32,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:58:32,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:58:32,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:58:32,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:58:32,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:58:32,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:58:32,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:58:32,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:58:32,867 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:58:32,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:58:32,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:58:32,884 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:58:32,885 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:58:32,886 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-10-14 21:58:32,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cde3fdb7/818957f32609496eab80ef2e42ee8179/FLAG12d0752a5 [2019-10-14 21:58:33,514 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:58:33,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-10-14 21:58:33,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cde3fdb7/818957f32609496eab80ef2e42ee8179/FLAG12d0752a5 [2019-10-14 21:58:33,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cde3fdb7/818957f32609496eab80ef2e42ee8179 [2019-10-14 21:58:33,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:58:33,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:58:33,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:58:33,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:58:33,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:58:33,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:33" (1/1) ... [2019-10-14 21:58:33,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39cbab6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:33, skipping insertion in model container [2019-10-14 21:58:33,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:33" (1/1) ... [2019-10-14 21:58:33,795 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:58:33,862 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:58:34,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:58:34,579 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:58:34,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:58:34,825 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:58:34,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34 WrapperNode [2019-10-14 21:58:34,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:58:34,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:58:34,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:58:34,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:58:34,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ... [2019-10-14 21:58:34,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ... [2019-10-14 21:58:34,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ... [2019-10-14 21:58:34,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ... [2019-10-14 21:58:34,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ... [2019-10-14 21:58:35,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ... [2019-10-14 21:58:35,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ... [2019-10-14 21:58:35,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:58:35,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:58:35,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:58:35,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:58:35,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (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 21:58:35,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:58:35,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:58:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:58:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:58:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:58:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:58:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:58:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:58:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:58:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:58:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:58:36,941 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:58:36,942 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:58:36,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:36 BoogieIcfgContainer [2019-10-14 21:58:36,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:58:36,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:58:36,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:58:36,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:58:36,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:58:33" (1/3) ... [2019-10-14 21:58:36,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3369a7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:36, skipping insertion in model container [2019-10-14 21:58:36,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (2/3) ... [2019-10-14 21:58:36,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3369a7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:36, skipping insertion in model container [2019-10-14 21:58:36,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:36" (3/3) ... [2019-10-14 21:58:36,956 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label10.c [2019-10-14 21:58:36,967 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:58:36,978 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:58:36,989 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:58:37,032 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:58:37,032 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:58:37,034 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:58:37,034 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:58:37,034 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:58:37,034 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:58:37,034 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:58:37,035 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:58:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:58:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:58:37,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:37,094 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] [2019-10-14 21:58:37,097 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:37,104 INFO L82 PathProgramCache]: Analyzing trace with hash 734030971, now seen corresponding path program 1 times [2019-10-14 21:58:37,114 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:37,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838128781] [2019-10-14 21:58:37,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:37,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:37,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:37,450 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 21:58:37,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838128781] [2019-10-14 21:58:37,452 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:37,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:58:37,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508212818] [2019-10-14 21:58:37,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:58:37,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:58:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:58:37,475 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:58:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:40,847 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-10-14 21:58:40,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:58:40,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-14 21:58:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:40,870 INFO L225 Difference]: With dead ends: 1009 [2019-10-14 21:58:40,870 INFO L226 Difference]: Without dead ends: 633 [2019-10-14 21:58:40,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:40,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-14 21:58:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-10-14 21:58:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 21:58:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-10-14 21:58:40,996 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 28 [2019-10-14 21:58:40,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:40,997 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-10-14 21:58:40,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:58:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-10-14 21:58:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 21:58:41,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:41,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:41,003 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1011694458, now seen corresponding path program 1 times [2019-10-14 21:58:41,004 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:41,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819880893] [2019-10-14 21:58:41,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:41,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:41,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:41,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819880893] [2019-10-14 21:58:41,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:41,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:58:41,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173307659] [2019-10-14 21:58:41,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:58:41,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:41,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:58:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:58:41,423 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-10-14 21:58:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:44,578 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-10-14 21:58:44,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:58:44,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 100 [2019-10-14 21:58:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:44,595 INFO L225 Difference]: With dead ends: 2436 [2019-10-14 21:58:44,595 INFO L226 Difference]: Without dead ends: 1816 [2019-10-14 21:58:44,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:58:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-10-14 21:58:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-10-14 21:58:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-10-14 21:58:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2527 transitions. [2019-10-14 21:58:44,699 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2527 transitions. Word has length 100 [2019-10-14 21:58:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:44,700 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2527 transitions. [2019-10-14 21:58:44,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:58:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2527 transitions. [2019-10-14 21:58:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 21:58:44,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:44,703 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:44,703 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash -356402163, now seen corresponding path program 1 times [2019-10-14 21:58:44,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:44,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077126221] [2019-10-14 21:58:44,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:44,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:44,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:44,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077126221] [2019-10-14 21:58:44,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945552286] [2019-10-14 21:58:44,901 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 21:58:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:44,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:44,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:45,054 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:45,055 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:58:45,055 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883098000] [2019-10-14 21:58:45,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:45,056 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:45,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:45,057 INFO L87 Difference]: Start difference. First operand 1777 states and 2527 transitions. Second operand 3 states. [2019-10-14 21:58:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:46,126 INFO L93 Difference]: Finished difference Result 4128 states and 5882 transitions. [2019-10-14 21:58:46,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:46,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-10-14 21:58:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:46,141 INFO L225 Difference]: With dead ends: 4128 [2019-10-14 21:58:46,141 INFO L226 Difference]: Without dead ends: 2357 [2019-10-14 21:58:46,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-10-14 21:58:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2349. [2019-10-14 21:58:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-14 21:58:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3262 transitions. [2019-10-14 21:58:46,219 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3262 transitions. Word has length 101 [2019-10-14 21:58:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:46,220 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3262 transitions. [2019-10-14 21:58:46,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3262 transitions. [2019-10-14 21:58:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:58:46,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:46,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:46,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:46,436 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash 306354774, now seen corresponding path program 1 times [2019-10-14 21:58:46,437 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:46,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462556966] [2019-10-14 21:58:46,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:46,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:46,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:46,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462556966] [2019-10-14 21:58:46,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591210755] [2019-10-14 21:58:46,693 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 21:58:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:46,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:46,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:46,807 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:46,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:58:46,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843755765] [2019-10-14 21:58:46,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:46,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:46,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:46,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:46,811 INFO L87 Difference]: Start difference. First operand 2349 states and 3262 transitions. Second operand 3 states. [2019-10-14 21:58:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:47,915 INFO L93 Difference]: Finished difference Result 4704 states and 6572 transitions. [2019-10-14 21:58:47,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:47,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2019-10-14 21:58:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:47,936 INFO L225 Difference]: With dead ends: 4704 [2019-10-14 21:58:47,936 INFO L226 Difference]: Without dead ends: 2361 [2019-10-14 21:58:47,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2019-10-14 21:58:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2349. [2019-10-14 21:58:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-14 21:58:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3200 transitions. [2019-10-14 21:58:48,037 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3200 transitions. Word has length 102 [2019-10-14 21:58:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:48,040 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3200 transitions. [2019-10-14 21:58:48,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3200 transitions. [2019-10-14 21:58:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:58:48,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:48,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:48,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:48,251 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1268458330, now seen corresponding path program 1 times [2019-10-14 21:58:48,252 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:48,253 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701421930] [2019-10-14 21:58:48,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:48,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:48,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:48,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701421930] [2019-10-14 21:58:48,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:48,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:58:48,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310816034] [2019-10-14 21:58:48,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:58:48,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:58:48,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:48,441 INFO L87 Difference]: Start difference. First operand 2349 states and 3200 transitions. Second operand 7 states. [2019-10-14 21:58:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:50,811 INFO L93 Difference]: Finished difference Result 6927 states and 10053 transitions. [2019-10-14 21:58:50,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:58:50,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-10-14 21:58:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:50,839 INFO L225 Difference]: With dead ends: 6927 [2019-10-14 21:58:50,840 INFO L226 Difference]: Without dead ends: 4584 [2019-10-14 21:58:50,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:58:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2019-10-14 21:58:51,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4339. [2019-10-14 21:58:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4339 states. [2019-10-14 21:58:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 5749 transitions. [2019-10-14 21:58:51,028 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 5749 transitions. Word has length 126 [2019-10-14 21:58:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:51,028 INFO L462 AbstractCegarLoop]: Abstraction has 4339 states and 5749 transitions. [2019-10-14 21:58:51,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:58:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 5749 transitions. [2019-10-14 21:58:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 21:58:51,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:51,032 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:51,033 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1769948106, now seen corresponding path program 1 times [2019-10-14 21:58:51,033 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:51,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334500752] [2019-10-14 21:58:51,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:51,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:51,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:58:51,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334500752] [2019-10-14 21:58:51,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841435671] [2019-10-14 21:58:51,328 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 21:58:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:51,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:58:51,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:51,493 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:51,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 21:58:51,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650255562] [2019-10-14 21:58:51,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:58:51,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:58:51,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:58:51,495 INFO L87 Difference]: Start difference. First operand 4339 states and 5749 transitions. Second operand 8 states. [2019-10-14 21:58:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:53,849 INFO L93 Difference]: Finished difference Result 10686 states and 15152 transitions. [2019-10-14 21:58:53,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:58:53,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 173 [2019-10-14 21:58:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:53,884 INFO L225 Difference]: With dead ends: 10686 [2019-10-14 21:58:53,884 INFO L226 Difference]: Without dead ends: 6353 [2019-10-14 21:58:53,898 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:58:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2019-10-14 21:58:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6072. [2019-10-14 21:58:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6072 states. [2019-10-14 21:58:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 7774 transitions. [2019-10-14 21:58:54,081 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 7774 transitions. Word has length 173 [2019-10-14 21:58:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:54,082 INFO L462 AbstractCegarLoop]: Abstraction has 6072 states and 7774 transitions. [2019-10-14 21:58:54,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:58:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 7774 transitions. [2019-10-14 21:58:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-14 21:58:54,087 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:54,087 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:58:54,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:54,299 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash 651997042, now seen corresponding path program 1 times [2019-10-14 21:58:54,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:54,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131438275] [2019-10-14 21:58:54,300 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:54,300 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:54,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:58:54,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131438275] [2019-10-14 21:58:54,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042299956] [2019-10-14 21:58:54,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:54,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:58:54,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:58:54,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:54,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:58:54,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082662457] [2019-10-14 21:58:54,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:54,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:54,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:54,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:54,875 INFO L87 Difference]: Start difference. First operand 6072 states and 7774 transitions. Second operand 3 states. [2019-10-14 21:58:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:56,214 INFO L93 Difference]: Finished difference Result 13284 states and 16998 transitions. [2019-10-14 21:58:56,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:56,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-10-14 21:58:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:56,265 INFO L225 Difference]: With dead ends: 13284 [2019-10-14 21:58:56,266 INFO L226 Difference]: Without dead ends: 7218 [2019-10-14 21:58:56,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7218 states. [2019-10-14 21:58:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7218 to 6462. [2019-10-14 21:58:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6462 states. [2019-10-14 21:58:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 8221 transitions. [2019-10-14 21:58:56,547 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 8221 transitions. Word has length 191 [2019-10-14 21:58:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:56,548 INFO L462 AbstractCegarLoop]: Abstraction has 6462 states and 8221 transitions. [2019-10-14 21:58:56,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 8221 transitions. [2019-10-14 21:58:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-14 21:58:56,554 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:56,554 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:58:56,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:56,764 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2031643392, now seen corresponding path program 1 times [2019-10-14 21:58:56,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:56,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147680529] [2019-10-14 21:58:56,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:56,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:56,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 41 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:58:57,126 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147680529] [2019-10-14 21:58:57,126 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278732631] [2019-10-14 21:58:57,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:57,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:58:57,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:57,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:58:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:58:57,347 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:57,347 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2019-10-14 21:58:57,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486271074] [2019-10-14 21:58:57,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:58:57,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:58:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:58:57,352 INFO L87 Difference]: Start difference. First operand 6462 states and 8221 transitions. Second operand 5 states. [2019-10-14 21:58:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:59,093 INFO L93 Difference]: Finished difference Result 12989 states and 16642 transitions. [2019-10-14 21:58:59,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:58:59,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 195 [2019-10-14 21:58:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:59,117 INFO L225 Difference]: With dead ends: 12989 [2019-10-14 21:58:59,117 INFO L226 Difference]: Without dead ends: 6533 [2019-10-14 21:58:59,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:58:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2019-10-14 21:58:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6500. [2019-10-14 21:58:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6500 states. [2019-10-14 21:58:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 8312 transitions. [2019-10-14 21:58:59,281 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 8312 transitions. Word has length 195 [2019-10-14 21:58:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:59,282 INFO L462 AbstractCegarLoop]: Abstraction has 6500 states and 8312 transitions. [2019-10-14 21:58:59,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:58:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 8312 transitions. [2019-10-14 21:58:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 21:58:59,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:59,287 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:58:59,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:59,491 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065224, now seen corresponding path program 1 times [2019-10-14 21:58:59,492 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:59,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571164075] [2019-10-14 21:58:59,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:59,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:59,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:58:59,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571164075] [2019-10-14 21:58:59,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361735339] [2019-10-14 21:58:59,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:59,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:59,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:00,161 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:00,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:59:00,161 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846883673] [2019-10-14 21:59:00,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:59:00,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:00,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:59:00,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:59:00,163 INFO L87 Difference]: Start difference. First operand 6500 states and 8312 transitions. Second operand 11 states. [2019-10-14 21:59:03,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:03,838 INFO L93 Difference]: Finished difference Result 14922 states and 20088 transitions. [2019-10-14 21:59:03,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:59:03,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 230 [2019-10-14 21:59:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:03,870 INFO L225 Difference]: With dead ends: 14922 [2019-10-14 21:59:03,870 INFO L226 Difference]: Without dead ends: 8428 [2019-10-14 21:59:03,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:59:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2019-10-14 21:59:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8268. [2019-10-14 21:59:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8268 states. [2019-10-14 21:59:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8268 states to 8268 states and 10473 transitions. [2019-10-14 21:59:04,069 INFO L78 Accepts]: Start accepts. Automaton has 8268 states and 10473 transitions. Word has length 230 [2019-10-14 21:59:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:04,070 INFO L462 AbstractCegarLoop]: Abstraction has 8268 states and 10473 transitions. [2019-10-14 21:59:04,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:59:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 8268 states and 10473 transitions. [2019-10-14 21:59:04,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-10-14 21:59:04,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:04,076 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:59:04,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:04,287 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:04,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:04,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2138370387, now seen corresponding path program 1 times [2019-10-14 21:59:04,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:04,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804175447] [2019-10-14 21:59:04,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:04,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:04,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 114 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:04,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804175447] [2019-10-14 21:59:04,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148551024] [2019-10-14 21:59:04,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:04,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:59:04,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:04,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:04,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:04,900 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2019-10-14 21:59:05,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:05,173 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:05,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-10-14 21:59:05,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152574036] [2019-10-14 21:59:05,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:59:05,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:05,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:59:05,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:59:05,175 INFO L87 Difference]: Start difference. First operand 8268 states and 10473 transitions. Second operand 15 states. [2019-10-14 21:59:07,661 WARN L191 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28