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/Problem15_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:04,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:04,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:04,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:04,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:04,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:04,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:04,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:04,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:04,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:04,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:04,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:04,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:04,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:04,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:04,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:04,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:04,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:04,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:04,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:04,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:04,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:04,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:04,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:04,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:04,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:04,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:04,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:04,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:04,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:04,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:04,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:04,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:04,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:04,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:04,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:04,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:04:04,564 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:04,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:04,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:04,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:04,567 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:04,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:04,567 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:04,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:04,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:04,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:04,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:04,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:04,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:04,570 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:04,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:04,571 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:04,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:04,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:04,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:04,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:04,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:04,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:04,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:04,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:04,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:04,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:04,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:04,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:04,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:04,916 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:04,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:04,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:04,943 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:04,943 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:04,944 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-10-13 18:04:05,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539d29ba6/34efd025803d48868b2a5e15ca6974ca/FLAG4485c9f33 [2019-10-13 18:04:05,710 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:05,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-10-13 18:04:05,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539d29ba6/34efd025803d48868b2a5e15ca6974ca/FLAG4485c9f33 [2019-10-13 18:04:05,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/539d29ba6/34efd025803d48868b2a5e15ca6974ca [2019-10-13 18:04:05,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:05,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:05,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:05,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:05,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:05,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:05" (1/1) ... [2019-10-13 18:04:05,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5efb01e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:05, skipping insertion in model container [2019-10-13 18:04:05,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:05" (1/1) ... [2019-10-13 18:04:05,883 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:05,963 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:06,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:06,911 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:07,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:07,285 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:07,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07 WrapperNode [2019-10-13 18:04:07,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:07,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:07,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:07,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:07,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (1/1) ... [2019-10-13 18:04:07,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (1/1) ... [2019-10-13 18:04:07,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (1/1) ... [2019-10-13 18:04:07,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (1/1) ... [2019-10-13 18:04:07,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (1/1) ... [2019-10-13 18:04:07,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (1/1) ... [2019-10-13 18:04:07,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (1/1) ... [2019-10-13 18:04:07,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:07,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:07,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:07,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:07,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:07,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:07,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:07,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:11,106 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:11,106 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:11,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:11 BoogieIcfgContainer [2019-10-13 18:04:11,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:11,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:11,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:11,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:11,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:05" (1/3) ... [2019-10-13 18:04:11,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758874c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:11, skipping insertion in model container [2019-10-13 18:04:11,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:07" (2/3) ... [2019-10-13 18:04:11,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758874c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:11, skipping insertion in model container [2019-10-13 18:04:11,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:11" (3/3) ... [2019-10-13 18:04:11,117 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label31.c [2019-10-13 18:04:11,128 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:11,138 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:11,152 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:11,198 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:11,199 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:11,199 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:11,199 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:11,199 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:11,199 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:11,199 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:11,200 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:04:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 18:04:11,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:11,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:11,262 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2120890949, now seen corresponding path program 1 times [2019-10-13 18:04:11,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:11,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815087492] [2019-10-13 18:04:11,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:11,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:11,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:11,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815087492] [2019-10-13 18:04:11,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:11,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:11,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919735300] [2019-10-13 18:04:11,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:11,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:11,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:11,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:11,875 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:17,946 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-10-13 18:04:17,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:17,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-10-13 18:04:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:17,978 INFO L225 Difference]: With dead ends: 1575 [2019-10-13 18:04:17,978 INFO L226 Difference]: Without dead ends: 1055 [2019-10-13 18:04:17,988 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 [2019-10-13 18:04:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-10-13 18:04:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-10-13 18:04:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-10-13 18:04:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-10-13 18:04:18,131 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 71 [2019-10-13 18:04:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:18,136 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-10-13 18:04:18,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-10-13 18:04:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 18:04:18,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:18,155 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, 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] [2019-10-13 18:04:18,155 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1052620642, now seen corresponding path program 1 times [2019-10-13 18:04:18,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:18,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551887047] [2019-10-13 18:04:18,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:18,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:18,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:18,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551887047] [2019-10-13 18:04:18,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074226730] [2019-10-13 18:04:18,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:18,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:18,649 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:18,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:04:18,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409935629] [2019-10-13 18:04:18,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:18,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:18,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:18,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:18,653 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-10-13 18:04:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:20,845 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-10-13 18:04:20,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:20,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-13 18:04:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:20,859 INFO L225 Difference]: With dead ends: 2976 [2019-10-13 18:04:20,860 INFO L226 Difference]: Without dead ends: 1958 [2019-10-13 18:04:20,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-10-13 18:04:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-10-13 18:04:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-10-13 18:04:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-10-13 18:04:20,949 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 140 [2019-10-13 18:04:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:20,952 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-10-13 18:04:20,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-10-13 18:04:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 18:04:20,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:20,957 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, 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] [2019-10-13 18:04:21,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:21,163 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:21,164 INFO L82 PathProgramCache]: Analyzing trace with hash -737037300, now seen corresponding path program 1 times [2019-10-13 18:04:21,164 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:21,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267510208] [2019-10-13 18:04:21,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:21,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:21,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:21,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267510208] [2019-10-13 18:04:21,532 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:21,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:04:21,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499835922] [2019-10-13 18:04:21,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:21,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:21,534 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-10-13 18:04:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:27,269 INFO L93 Difference]: Finished difference Result 5861 states and 8774 transitions. [2019-10-13 18:04:27,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:04:27,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 157 [2019-10-13 18:04:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:27,295 INFO L225 Difference]: With dead ends: 5861 [2019-10-13 18:04:27,295 INFO L226 Difference]: Without dead ends: 3912 [2019-10-13 18:04:27,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2019-10-13 18:04:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934. [2019-10-13 18:04:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-10-13 18:04:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-10-13 18:04:27,427 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 157 [2019-10-13 18:04:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:27,429 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-10-13 18:04:27,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-10-13 18:04:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-10-13 18:04:27,435 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:27,436 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:27,436 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:27,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2140205233, now seen corresponding path program 1 times [2019-10-13 18:04:27,437 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:27,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334753612] [2019-10-13 18:04:27,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:27,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:27,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:28,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334753612] [2019-10-13 18:04:28,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643242137] [2019-10-13 18:04:28,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:28,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:28,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:28,356 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:28,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:04:28,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668411893] [2019-10-13 18:04:28,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:28,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:28,360 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 3 states. [2019-10-13 18:04:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:30,581 INFO L93 Difference]: Finished difference Result 7426 states and 10578 transitions. [2019-10-13 18:04:30,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:30,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2019-10-13 18:04:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:30,606 INFO L225 Difference]: With dead ends: 7426 [2019-10-13 18:04:30,606 INFO L226 Difference]: Without dead ends: 4498 [2019-10-13 18:04:30,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2019-10-13 18:04:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4495. [2019-10-13 18:04:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4495 states. [2019-10-13 18:04:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 6012 transitions. [2019-10-13 18:04:30,726 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 6012 transitions. Word has length 345 [2019-10-13 18:04:30,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:30,727 INFO L462 AbstractCegarLoop]: Abstraction has 4495 states and 6012 transitions. [2019-10-13 18:04:30,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 6012 transitions. [2019-10-13 18:04:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2019-10-13 18:04:30,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:30,740 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:04:30,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:30,948 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash 903358243, now seen corresponding path program 1 times [2019-10-13 18:04:30,949 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:30,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550334338] [2019-10-13 18:04:30,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:30,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:30,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 18:04:31,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550334338] [2019-10-13 18:04:31,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656216954] [2019-10-13 18:04:31,502 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 [2019-10-13 18:04:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:31,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 359 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:04:31,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:31,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:04:31,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018634070] [2019-10-13 18:04:31,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:04:31,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:31,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:04:31,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:04:31,841 INFO L87 Difference]: Start difference. First operand 4495 states and 6012 transitions. Second operand 11 states. [2019-10-13 18:04:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:41,856 INFO L93 Difference]: Finished difference Result 13394 states and 21471 transitions. [2019-10-13 18:04:41,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 18:04:41,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 437 [2019-10-13 18:04:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:41,922 INFO L225 Difference]: With dead ends: 13394 [2019-10-13 18:04:41,922 INFO L226 Difference]: Without dead ends: 8905 [2019-10-13 18:04:41,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-10-13 18:04:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8905 states. [2019-10-13 18:04:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8905 to 8155. [2019-10-13 18:04:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8155 states. [2019-10-13 18:04:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8155 states to 8155 states and 11732 transitions. [2019-10-13 18:04:42,283 INFO L78 Accepts]: Start accepts. Automaton has 8155 states and 11732 transitions. Word has length 437 [2019-10-13 18:04:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:42,284 INFO L462 AbstractCegarLoop]: Abstraction has 8155 states and 11732 transitions. [2019-10-13 18:04:42,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:04:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 8155 states and 11732 transitions. [2019-10-13 18:04:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2019-10-13 18:04:42,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:42,304 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:04:42,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:42,509 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash -939917433, now seen corresponding path program 1 times [2019-10-13 18:04:42,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:42,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471388372] [2019-10-13 18:04:42,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:42,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:42,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat