java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:54,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:54,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:54,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:54,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:54,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:54,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:54,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:54,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:54,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:54,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:54,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:54,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:54,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:54,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:54,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:54,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:54,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:54,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:54,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:54,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:54,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:54,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:54,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:54,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:54,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:54,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:54,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:54,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:54,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:54,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:54,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:54,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:54,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:54,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:54,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:54,466 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 18:05:54,499 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:54,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:54,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:54,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:54,504 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:54,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:54,505 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:54,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:54,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:54,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:54,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:54,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:54,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:54,508 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:54,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:54,509 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:54,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:54,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:54,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:54,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:54,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:54,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:54,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:54,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:54,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:54,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:54,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:54,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:54,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:54,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:54,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:54,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:54,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:54,811 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:54,812 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label47.c [2019-10-13 18:05:54,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25325ea3d/c3d46337ba4445689d96097f62b97c44/FLAG9b99f112d [2019-10-13 18:05:55,509 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:55,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label47.c [2019-10-13 18:05:55,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25325ea3d/c3d46337ba4445689d96097f62b97c44/FLAG9b99f112d [2019-10-13 18:05:55,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25325ea3d/c3d46337ba4445689d96097f62b97c44 [2019-10-13 18:05:55,664 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:55,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:55,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:55,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:55,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:55,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:55" (1/1) ... [2019-10-13 18:05:55,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f66df1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:55, skipping insertion in model container [2019-10-13 18:05:55,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:55" (1/1) ... [2019-10-13 18:05:55,682 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:55,763 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:56,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:56,641 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:56,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:57,012 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:57,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57 WrapperNode [2019-10-13 18:05:57,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:57,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:57,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:57,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:57,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (1/1) ... [2019-10-13 18:05:57,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (1/1) ... [2019-10-13 18:05:57,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (1/1) ... [2019-10-13 18:05:57,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (1/1) ... [2019-10-13 18:05:57,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (1/1) ... [2019-10-13 18:05:57,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (1/1) ... [2019-10-13 18:05:57,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (1/1) ... [2019-10-13 18:05:57,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:57,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:57,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:57,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:57,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (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 18:05:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:57,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:57,264 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:57,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:57,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:59,574 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:59,575 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:59,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:59 BoogieIcfgContainer [2019-10-13 18:05:59,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:59,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:59,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:59,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:59,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:55" (1/3) ... [2019-10-13 18:05:59,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2e4a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:59, skipping insertion in model container [2019-10-13 18:05:59,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:57" (2/3) ... [2019-10-13 18:05:59,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e2e4a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:59, skipping insertion in model container [2019-10-13 18:05:59,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:59" (3/3) ... [2019-10-13 18:05:59,586 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label47.c [2019-10-13 18:05:59,596 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:59,604 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:59,616 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:59,647 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:59,648 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:59,648 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:59,648 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:59,648 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:59,648 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:59,648 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:59,649 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 18:05:59,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:59,687 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 18:05:59,689 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1116751826, now seen corresponding path program 1 times [2019-10-13 18:05:59,701 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:59,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179155380] [2019-10-13 18:05:59,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:59,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:59,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:00,105 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 18:06:00,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179155380] [2019-10-13 18:06:00,107 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:00,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:00,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310204598] [2019-10-13 18:06:00,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:00,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:00,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:00,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:00,130 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:06:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:05,879 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-13 18:06:05,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:05,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-10-13 18:06:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:05,922 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:06:05,922 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:06:05,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:06:06,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:06:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:06:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-13 18:06:06,056 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 71 [2019-10-13 18:06:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:06,057 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-13 18:06:06,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-13 18:06:06,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 18:06:06,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:06,071 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] [2019-10-13 18:06:06,072 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash -533653573, now seen corresponding path program 1 times [2019-10-13 18:06:06,073 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:06,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703088830] [2019-10-13 18:06:06,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:06,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:06,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:06,495 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 18:06:06,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703088830] [2019-10-13 18:06:06,496 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:06,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:06:06,497 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854619267] [2019-10-13 18:06:06,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:06:06,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:06:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:06,500 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-13 18:06:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:10,777 INFO L93 Difference]: Finished difference Result 3118 states and 4964 transitions. [2019-10-13 18:06:10,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:06:10,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 154 [2019-10-13 18:06:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:10,795 INFO L225 Difference]: With dead ends: 3118 [2019-10-13 18:06:10,795 INFO L226 Difference]: Without dead ends: 2093 [2019-10-13 18:06:10,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:06:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2019-10-13 18:06:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2075. [2019-10-13 18:06:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2019-10-13 18:06:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2956 transitions. [2019-10-13 18:06:10,903 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2956 transitions. Word has length 154 [2019-10-13 18:06:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:10,906 INFO L462 AbstractCegarLoop]: Abstraction has 2075 states and 2956 transitions. [2019-10-13 18:06:10,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:06:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2956 transitions. [2019-10-13 18:06:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 18:06:10,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:10,919 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] [2019-10-13 18:06:10,919 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -564206834, now seen corresponding path program 1 times [2019-10-13 18:06:10,921 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:10,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194653284] [2019-10-13 18:06:10,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:10,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:10,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:06:11,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194653284] [2019-10-13 18:06:11,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675651986] [2019-10-13 18:06:11,251 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 18:06:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:11,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:11,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:11,440 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 18:06:11,440 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:11,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 18:06:11,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386458401] [2019-10-13 18:06:11,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:06:11,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:11,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:06:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:06:11,443 INFO L87 Difference]: Start difference. First operand 2075 states and 2956 transitions. Second operand 3 states. [2019-10-13 18:06:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:13,121 INFO L93 Difference]: Finished difference Result 3102 states and 4277 transitions. [2019-10-13 18:06:13,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:06:13,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-10-13 18:06:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:13,140 INFO L225 Difference]: With dead ends: 3102 [2019-10-13 18:06:13,140 INFO L226 Difference]: Without dead ends: 3100 [2019-10-13 18:06:13,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:06:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2019-10-13 18:06:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2755. [2019-10-13 18:06:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2755 states. [2019-10-13 18:06:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 3884 transitions. [2019-10-13 18:06:13,220 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 3884 transitions. Word has length 171 [2019-10-13 18:06:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:13,221 INFO L462 AbstractCegarLoop]: Abstraction has 2755 states and 3884 transitions. [2019-10-13 18:06:13,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:06:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 3884 transitions. [2019-10-13 18:06:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-10-13 18:06:13,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:13,227 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 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 18:06:13,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:13,433 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:13,434 INFO L82 PathProgramCache]: Analyzing trace with hash 569848127, now seen corresponding path program 1 times [2019-10-13 18:06:13,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:13,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66107725] [2019-10-13 18:06:13,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:13,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:13,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:06:13,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66107725] [2019-10-13 18:06:13,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157956524] [2019-10-13 18:06:13,941 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 18:06:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:14,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:14,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:14,199 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:14,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:06:14,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290122313] [2019-10-13 18:06:14,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:06:14,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:06:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:14,202 INFO L87 Difference]: Start difference. First operand 2755 states and 3884 transitions. Second operand 12 states. [2019-10-13 18:06:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:21,953 INFO L93 Difference]: Finished difference Result 7991 states and 11355 transitions. [2019-10-13 18:06:21,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 18:06:21,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 286 [2019-10-13 18:06:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:21,990 INFO L225 Difference]: With dead ends: 7991 [2019-10-13 18:06:21,990 INFO L226 Difference]: Without dead ends: 5242 [2019-10-13 18:06:22,000 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:06:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2019-10-13 18:06:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4510. [2019-10-13 18:06:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4510 states. [2019-10-13 18:06:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5583 transitions. [2019-10-13 18:06:22,132 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5583 transitions. Word has length 286 [2019-10-13 18:06:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:22,134 INFO L462 AbstractCegarLoop]: Abstraction has 4510 states and 5583 transitions. [2019-10-13 18:06:22,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:06:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5583 transitions. [2019-10-13 18:06:22,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2019-10-13 18:06:22,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:22,155 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:22,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:22,367 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1703405511, now seen corresponding path program 1 times [2019-10-13 18:06:22,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:22,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873440572] [2019-10-13 18:06:22,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:22,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:22,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 587 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2019-10-13 18:06:23,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873440572] [2019-10-13 18:06:23,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402550262] [2019-10-13 18:06:23,251 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 18:06:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:23,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:23,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 590 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2019-10-13 18:06:23,633 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:23,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:23,633 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922749980] [2019-10-13 18:06:23,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:23,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:23,636 INFO L87 Difference]: Start difference. First operand 4510 states and 5583 transitions. Second operand 11 states. [2019-10-13 18:06:29,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:29,867 INFO L93 Difference]: Finished difference Result 10080 states and 12704 transitions. [2019-10-13 18:06:29,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 18:06:29,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 640 [2019-10-13 18:06:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:29,893 INFO L225 Difference]: With dead ends: 10080 [2019-10-13 18:06:29,894 INFO L226 Difference]: Without dead ends: 5576 [2019-10-13 18:06:29,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:06:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2019-10-13 18:06:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 5560. [2019-10-13 18:06:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5560 states. [2019-10-13 18:06:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6810 transitions. [2019-10-13 18:06:30,027 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6810 transitions. Word has length 640 [2019-10-13 18:06:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:30,029 INFO L462 AbstractCegarLoop]: Abstraction has 5560 states and 6810 transitions. [2019-10-13 18:06:30,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6810 transitions. [2019-10-13 18:06:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2019-10-13 18:06:30,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:30,061 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:30,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:30,274 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:30,288 INFO L82 PathProgramCache]: Analyzing trace with hash 319020650, now seen corresponding path program 1 times [2019-10-13 18:06:30,288 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:30,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494459220] [2019-10-13 18:06:30,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:30,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:30,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 324 proven. 20 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2019-10-13 18:06:31,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494459220] [2019-10-13 18:06:31,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602325815] [2019-10-13 18:06:31,073 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 [2019-10-13 18:06:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:31,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:31,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2019-10-13 18:06:31,787 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:31,787 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 18:06:31,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301010117] [2019-10-13 18:06:31,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:06:31,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:06:31,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:31,790 INFO L87 Difference]: Start difference. First operand 5560 states and 6810 transitions. Second operand 3 states.