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/Problem10_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:56:46,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:56:46,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:56:46,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:56:46,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:56:46,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:56:46,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:56:46,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:56:46,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:56:46,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:56:46,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:56:46,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:56:46,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:56:46,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:56:46,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:56:46,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:56:46,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:56:46,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:56:46,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:56:46,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:56:46,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:56:46,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:56:46,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:56:46,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:56:46,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:56:46,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:56:46,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:56:46,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:56:46,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:56:46,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:56:46,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:56:46,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:56:46,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:56:46,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:56:46,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:56:46,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:56:46,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:56:46,440 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:56:46,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:56:46,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:56:46,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:56:46,442 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:56:46,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:56:46,444 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:56:46,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:56:46,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:56:46,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:56:46,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:56:46,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:56:46,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:56:46,445 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:56:46,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:56:46,446 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:56:46,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:56:46,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:56:46,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:56:46,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:56:46,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:56:46,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:56:46,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:56:46,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:56:46,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:56:46,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:56:46,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:56:46,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:56:46,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:56:46,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:56:46,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:56:46,726 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:56:46,728 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:56:46,728 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:56:46,729 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label14.c [2019-10-14 21:56:46,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e36ea2625/d140b5baf24647c691d70a4b9ba818ae/FLAGf4c8b52d5 [2019-10-14 21:56:47,339 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:56:47,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label14.c [2019-10-14 21:56:47,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e36ea2625/d140b5baf24647c691d70a4b9ba818ae/FLAGf4c8b52d5 [2019-10-14 21:56:47,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e36ea2625/d140b5baf24647c691d70a4b9ba818ae [2019-10-14 21:56:47,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:56:47,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:56:47,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:47,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:56:47,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:56:47,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a73aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:47, skipping insertion in model container [2019-10-14 21:56:47,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:47" (1/1) ... [2019-10-14 21:56:47,686 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:56:47,738 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:56:48,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:48,264 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:56:48,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:48,439 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:56:48,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48 WrapperNode [2019-10-14 21:56:48,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:48,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:56:48,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:56:48,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:56:48,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (1/1) ... [2019-10-14 21:56:48,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (1/1) ... [2019-10-14 21:56:48,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (1/1) ... [2019-10-14 21:56:48,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (1/1) ... [2019-10-14 21:56:48,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (1/1) ... [2019-10-14 21:56:48,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (1/1) ... [2019-10-14 21:56:48,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (1/1) ... [2019-10-14 21:56:48,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:56:48,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:56:48,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:56:48,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:56:48,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:56:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:56:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:56:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:56:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:56:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:56:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:56:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:56:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:56:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:56:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:56:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:56:49,922 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:56:49,922 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:56:49,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:49 BoogieIcfgContainer [2019-10-14 21:56:49,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:56:49,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:56:49,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:56:49,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:56:49,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:56:47" (1/3) ... [2019-10-14 21:56:49,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e887e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:49, skipping insertion in model container [2019-10-14 21:56:49,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:48" (2/3) ... [2019-10-14 21:56:49,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e887e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:49, skipping insertion in model container [2019-10-14 21:56:49,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:49" (3/3) ... [2019-10-14 21:56:49,932 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label14.c [2019-10-14 21:56:49,942 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:56:49,951 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:56:49,963 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:56:50,005 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:56:50,006 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:56:50,006 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:56:50,006 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:56:50,006 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:56:50,007 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:56:50,007 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:56:50,007 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:56:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:56:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:56:50,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:50,060 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] [2019-10-14 21:56:50,063 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:50,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1721053394, now seen corresponding path program 1 times [2019-10-14 21:56:50,082 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:50,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089214989] [2019-10-14 21:56:50,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:50,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:50,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:50,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089214989] [2019-10-14 21:56:50,489 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:56:50,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:56:50,490 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842559719] [2019-10-14 21:56:50,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:56:50,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:56:50,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:56:50,513 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:56:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:52,636 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-10-14 21:56:52,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:56:52,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-10-14 21:56:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:52,655 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:56:52,655 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:56:52,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:56:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:56:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-10-14 21:56:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-14 21:56:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-10-14 21:56:52,751 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 37 [2019-10-14 21:56:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:52,752 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-10-14 21:56:52,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:56:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-10-14 21:56:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 21:56:52,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:52,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:52,762 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:52,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1761481729, now seen corresponding path program 1 times [2019-10-14 21:56:52,763 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:52,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129806003] [2019-10-14 21:56:52,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:52,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:52,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:53,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129806003] [2019-10-14 21:56:53,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199816973] [2019-10-14 21:56:53,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:56:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:53,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:56:53,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:56:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:53,432 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:56:53,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-14 21:56:53,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087902065] [2019-10-14 21:56:53,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:56:53,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:53,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:56:53,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:56:53,436 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 5 states. [2019-10-14 21:56:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:54,422 INFO L93 Difference]: Finished difference Result 1031 states and 1586 transitions. [2019-10-14 21:56:54,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:56:54,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-14 21:56:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:54,428 INFO L225 Difference]: With dead ends: 1031 [2019-10-14 21:56:54,428 INFO L226 Difference]: Without dead ends: 596 [2019-10-14 21:56:54,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:56:54,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-10-14 21:56:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2019-10-14 21:56:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-10-14 21:56:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 865 transitions. [2019-10-14 21:56:54,487 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 865 transitions. Word has length 156 [2019-10-14 21:56:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:54,488 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 865 transitions. [2019-10-14 21:56:54,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:56:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 865 transitions. [2019-10-14 21:56:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 21:56:54,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:54,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:54,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:56:54,709 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 630639194, now seen corresponding path program 1 times [2019-10-14 21:56:54,710 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:54,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003557460] [2019-10-14 21:56:54,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:54,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:54,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:55,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003557460] [2019-10-14 21:56:55,094 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:56:55,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:56:55,094 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274966274] [2019-10-14 21:56:55,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:56:55,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:55,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:56:55,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:56:55,106 INFO L87 Difference]: Start difference. First operand 590 states and 865 transitions. Second operand 9 states. [2019-10-14 21:56:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:56:57,135 INFO L93 Difference]: Finished difference Result 1939 states and 3010 transitions. [2019-10-14 21:56:57,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:56:57,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2019-10-14 21:56:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:56:57,145 INFO L225 Difference]: With dead ends: 1939 [2019-10-14 21:56:57,145 INFO L226 Difference]: Without dead ends: 1355 [2019-10-14 21:56:57,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:56:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-10-14 21:56:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 894. [2019-10-14 21:56:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-10-14 21:56:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1190 transitions. [2019-10-14 21:56:57,194 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1190 transitions. Word has length 163 [2019-10-14 21:56:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:56:57,195 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1190 transitions. [2019-10-14 21:56:57,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:56:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1190 transitions. [2019-10-14 21:56:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-14 21:56:57,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:57,200 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:57,200 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash -545211835, now seen corresponding path program 1 times [2019-10-14 21:56:57,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:57,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088633460] [2019-10-14 21:56:57,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:57,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:57,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:56:58,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088633460] [2019-10-14 21:56:58,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184895416] [2019-10-14 21:56:58,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:56:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:58,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:56:58,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:56:58,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:56:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:56:58,417 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:56:58,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-10-14 21:56:58,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469864945] [2019-10-14 21:56:58,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:56:58,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:56:58,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:56:58,421 INFO L87 Difference]: Start difference. First operand 894 states and 1190 transitions. Second operand 15 states. [2019-10-14 21:57:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:03,270 INFO L93 Difference]: Finished difference Result 2114 states and 2917 transitions. [2019-10-14 21:57:03,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:57:03,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 226 [2019-10-14 21:57:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:03,286 INFO L225 Difference]: With dead ends: 2114 [2019-10-14 21:57:03,286 INFO L226 Difference]: Without dead ends: 1369 [2019-10-14 21:57:03,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 21:57:03,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2019-10-14 21:57:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1051. [2019-10-14 21:57:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-10-14 21:57:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1323 transitions. [2019-10-14 21:57:03,376 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1323 transitions. Word has length 226 [2019-10-14 21:57:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:03,378 INFO L462 AbstractCegarLoop]: Abstraction has 1051 states and 1323 transitions. [2019-10-14 21:57:03,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:57:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1323 transitions. [2019-10-14 21:57:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-10-14 21:57:03,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:03,385 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:57:03,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:03,599 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1220888374, now seen corresponding path program 1 times [2019-10-14 21:57:03,600 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:03,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022396380] [2019-10-14 21:57:03,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:03,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:03,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:03,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022396380] [2019-10-14 21:57:03,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876717186] [2019-10-14 21:57:03,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:04,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:04,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:04,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:57:04,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217949677] [2019-10-14 21:57:04,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:57:04,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:57:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:04,138 INFO L87 Difference]: Start difference. First operand 1051 states and 1323 transitions. Second operand 11 states. [2019-10-14 21:57:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:07,241 INFO L93 Difference]: Finished difference Result 3243 states and 4611 transitions. [2019-10-14 21:57:07,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:57:07,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 241 [2019-10-14 21:57:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:07,279 INFO L225 Difference]: With dead ends: 3243 [2019-10-14 21:57:07,279 INFO L226 Difference]: Without dead ends: 1258 [2019-10-14 21:57:07,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:57:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2019-10-14 21:57:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1228. [2019-10-14 21:57:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-10-14 21:57:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1503 transitions. [2019-10-14 21:57:07,331 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1503 transitions. Word has length 241 [2019-10-14 21:57:07,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:07,332 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1503 transitions. [2019-10-14 21:57:07,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:57:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1503 transitions. [2019-10-14 21:57:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-10-14 21:57:07,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:07,338 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:57:07,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:07,546 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:07,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1555176578, now seen corresponding path program 1 times [2019-10-14 21:57:07,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:07,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993015537] [2019-10-14 21:57:07,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:07,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:07,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 60 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:57:07,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993015537] [2019-10-14 21:57:07,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537656644] [2019-10-14 21:57:07,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:07,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:57:07,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:57:08,007 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:08,007 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:57:08,007 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385251622] [2019-10-14 21:57:08,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:08,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:08,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:08,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:08,009 INFO L87 Difference]: Start difference. First operand 1228 states and 1503 transitions. Second operand 5 states. [2019-10-14 21:57:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:08,799 INFO L93 Difference]: Finished difference Result 2281 states and 2775 transitions. [2019-10-14 21:57:08,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:08,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2019-10-14 21:57:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:08,806 INFO L225 Difference]: With dead ends: 2281 [2019-10-14 21:57:08,806 INFO L226 Difference]: Without dead ends: 1218 [2019-10-14 21:57:08,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-10-14 21:57:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1196. [2019-10-14 21:57:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2019-10-14 21:57:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1370 transitions. [2019-10-14 21:57:08,840 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1370 transitions. Word has length 251 [2019-10-14 21:57:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:08,840 INFO L462 AbstractCegarLoop]: Abstraction has 1196 states and 1370 transitions. [2019-10-14 21:57:08,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1370 transitions. [2019-10-14 21:57:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-10-14 21:57:08,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:08,847 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:09,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:09,051 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:09,051 INFO L82 PathProgramCache]: Analyzing trace with hash 677384141, now seen corresponding path program 1 times [2019-10-14 21:57:09,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:09,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48205448] [2019-10-14 21:57:09,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:09,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:09,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 245 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 21:57:10,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48205448] [2019-10-14 21:57:10,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745474220] [2019-10-14 21:57:10,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:10,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:57:10,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:10,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:10,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:10,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:10,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:10,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:10,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:10,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:10,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:22,755 WARN L191 SmtUtils]: Spent 11.82 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-10-14 21:57:22,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:57:22,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:57:23,138 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:23,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-10-14 21:57:23,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503069175] [2019-10-14 21:57:23,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:57:23,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:57:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:57:23,141 INFO L87 Difference]: Start difference. First operand 1196 states and 1370 transitions. Second operand 24 states.