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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:05:06,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:05:06,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:05:06,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:05:06,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:05:06,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:05:06,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:05:06,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:05:06,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:05:06,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:05:06,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:05:06,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:05:06,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:05:06,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:05:06,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:05:06,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:05:06,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:05:06,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:05:06,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:05:06,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:05:06,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:05:06,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:05:06,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:05:06,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:05:06,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:05:06,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:05:06,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:05:06,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:05:06,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:05:06,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:05:06,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:05:06,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:05:06,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:05:06,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:05:06,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:05:06,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:05:06,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:05:06,444 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:05:06,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:05:06,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:05:06,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:05:06,446 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:05:06,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:05:06,450 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:05:06,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:05:06,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:05:06,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:05:06,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:05:06,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:05:06,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:05:06,451 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:05:06,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:05:06,451 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:05:06,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:05:06,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:05:06,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:05:06,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:05:06,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:05:06,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:05:06,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:05:06,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:05:06,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:05:06,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:05:06,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:05:06,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:05:06,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:05:06,735 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:05:06,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:05:06,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:05:06,758 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:05:06,758 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:05:06,759 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-10-14 22:05:06,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0780e0abc/becbce6efff5494c87a2f8cb45010617/FLAGc3b33c758 [2019-10-14 22:05:07,498 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:05:07,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-10-14 22:05:07,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0780e0abc/becbce6efff5494c87a2f8cb45010617/FLAGc3b33c758 [2019-10-14 22:05:07,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0780e0abc/becbce6efff5494c87a2f8cb45010617 [2019-10-14 22:05:07,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:05:07,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:05:07,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:07,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:05:07,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:05:07,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad4c578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:07, skipping insertion in model container [2019-10-14 22:05:07,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:07" (1/1) ... [2019-10-14 22:05:07,690 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:05:07,771 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:05:08,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:08,913 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:05:09,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:09,166 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:05:09,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09 WrapperNode [2019-10-14 22:05:09,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:09,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:05:09,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:05:09,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:05:09,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (1/1) ... [2019-10-14 22:05:09,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (1/1) ... [2019-10-14 22:05:09,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (1/1) ... [2019-10-14 22:05:09,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (1/1) ... [2019-10-14 22:05:09,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (1/1) ... [2019-10-14 22:05:09,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (1/1) ... [2019-10-14 22:05:09,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (1/1) ... [2019-10-14 22:05:09,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:05:09,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:05:09,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:05:09,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:05:09,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:05:09,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:05:09,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:05:09,413 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:05:09,414 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:05:09,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:05:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:05:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:05:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:05:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:05:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:05:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:05:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:05:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:05:11,632 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:05:11,633 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:05:11,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:11 BoogieIcfgContainer [2019-10-14 22:05:11,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:05:11,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:05:11,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:05:11,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:05:11,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:05:07" (1/3) ... [2019-10-14 22:05:11,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c85343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:11, skipping insertion in model container [2019-10-14 22:05:11,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:09" (2/3) ... [2019-10-14 22:05:11,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c85343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:11, skipping insertion in model container [2019-10-14 22:05:11,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:11" (3/3) ... [2019-10-14 22:05:11,650 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label56.c [2019-10-14 22:05:11,663 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:05:11,672 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:05:11,684 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:05:11,731 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:05:11,731 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:05:11,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:05:11,731 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:05:11,731 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:05:11,731 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:05:11,732 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:05:11,732 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:05:11,772 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:05:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 22:05:11,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:11,779 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] [2019-10-14 22:05:11,781 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash -645226158, now seen corresponding path program 1 times [2019-10-14 22:05:11,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:11,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138920731] [2019-10-14 22:05:11,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:11,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:11,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:12,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138920731] [2019-10-14 22:05:12,211 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:12,211 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:05:12,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315253782] [2019-10-14 22:05:12,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:12,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:12,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:12,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:05:12,242 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:05:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:17,403 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-14 22:05:17,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:05:17,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-14 22:05:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:17,431 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:05:17,431 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:05:17,442 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 [2019-10-14 22:05:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:05:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:05:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:05:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-10-14 22:05:17,576 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 39 [2019-10-14 22:05:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:17,577 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-10-14 22:05:17,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-10-14 22:05:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-14 22:05:17,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:17,589 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:05:17,589 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash 760162007, now seen corresponding path program 1 times [2019-10-14 22:05:17,590 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:17,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592999953] [2019-10-14 22:05:17,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:17,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:17,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:05:18,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592999953] [2019-10-14 22:05:18,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444935847] [2019-10-14 22:05:18,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:18,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:05:18,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 22:05:18,324 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:18,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-14 22:05:18,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253636240] [2019-10-14 22:05:18,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:18,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:18,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:18,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:05:18,327 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-10-14 22:05:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:21,766 INFO L93 Difference]: Finished difference Result 3133 states and 5148 transitions. [2019-10-14 22:05:21,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:05:21,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2019-10-14 22:05:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:21,786 INFO L225 Difference]: With dead ends: 3133 [2019-10-14 22:05:21,787 INFO L226 Difference]: Without dead ends: 2108 [2019-10-14 22:05:21,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-10-14 22:05:21,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2078. [2019-10-14 22:05:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-10-14 22:05:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-10-14 22:05:21,897 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 206 [2019-10-14 22:05:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:21,899 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-10-14 22:05:21,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-10-14 22:05:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-14 22:05:21,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:21,913 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:05:22,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:22,120 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:22,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1337668705, now seen corresponding path program 1 times [2019-10-14 22:05:22,121 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:22,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62749112] [2019-10-14 22:05:22,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:22,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:22,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:05:22,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62749112] [2019-10-14 22:05:22,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111402274] [2019-10-14 22:05:22,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:22,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:05:22,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 22:05:22,634 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:22,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:05:22,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144035612] [2019-10-14 22:05:22,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:22,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:22,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:22,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:22,639 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-10-14 22:05:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:25,926 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-10-14 22:05:25,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:05:25,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2019-10-14 22:05:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:25,961 INFO L225 Difference]: With dead ends: 6302 [2019-10-14 22:05:25,961 INFO L226 Difference]: Without dead ends: 4230 [2019-10-14 22:05:25,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 210 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 22:05:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-10-14 22:05:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-10-14 22:05:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-10-14 22:05:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5868 transitions. [2019-10-14 22:05:26,119 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5868 transitions. Word has length 210 [2019-10-14 22:05:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:26,119 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5868 transitions. [2019-10-14 22:05:26,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5868 transitions. [2019-10-14 22:05:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-10-14 22:05:26,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:26,132 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:26,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:26,337 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash 899625711, now seen corresponding path program 1 times [2019-10-14 22:05:26,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:26,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843661570] [2019-10-14 22:05:26,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:26,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:26,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 177 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 22:05:26,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843661570] [2019-10-14 22:05:26,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422617134] [2019-10-14 22:05:26,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:26,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 22:05:27,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:27,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:05:27,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172963428] [2019-10-14 22:05:27,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:27,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:27,082 INFO L87 Difference]: Start difference. First operand 4208 states and 5868 transitions. Second operand 11 states. [2019-10-14 22:05:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:31,389 INFO L93 Difference]: Finished difference Result 10864 states and 15768 transitions. [2019-10-14 22:05:31,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:05:31,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 314 [2019-10-14 22:05:31,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:31,421 INFO L225 Difference]: With dead ends: 10864 [2019-10-14 22:05:31,421 INFO L226 Difference]: Without dead ends: 6662 [2019-10-14 22:05:31,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:05:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-10-14 22:05:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4930. [2019-10-14 22:05:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2019-10-14 22:05:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 6891 transitions. [2019-10-14 22:05:31,586 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 6891 transitions. Word has length 314 [2019-10-14 22:05:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:31,588 INFO L462 AbstractCegarLoop]: Abstraction has 4930 states and 6891 transitions. [2019-10-14 22:05:31,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 6891 transitions. [2019-10-14 22:05:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-10-14 22:05:31,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:31,597 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-10-14 22:05:31,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:31,801 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:31,802 INFO L82 PathProgramCache]: Analyzing trace with hash 410038599, now seen corresponding path program 1 times [2019-10-14 22:05:31,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:31,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790030688] [2019-10-14 22:05:31,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:31,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:31,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 96 proven. 206 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-14 22:05:32,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790030688] [2019-10-14 22:05:32,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029218481] [2019-10-14 22:05:32,414 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 22:05:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:32,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:05:32,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2019-10-14 22:05:32,826 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:32,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:05:32,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334252845] [2019-10-14 22:05:32,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:32,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:32,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:32,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:32,829 INFO L87 Difference]: Start difference. First operand 4930 states and 6891 transitions. Second operand 5 states. [2019-10-14 22:05:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:35,628 INFO L93 Difference]: Finished difference Result 11257 states and 15760 transitions. [2019-10-14 22:05:35,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:05:35,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 390 [2019-10-14 22:05:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:35,661 INFO L225 Difference]: With dead ends: 11257 [2019-10-14 22:05:35,661 INFO L226 Difference]: Without dead ends: 6333 [2019-10-14 22:05:35,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2019-10-14 22:05:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 6307. [2019-10-14 22:05:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6307 states. [2019-10-14 22:05:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 8081 transitions. [2019-10-14 22:05:35,822 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 8081 transitions. Word has length 390 [2019-10-14 22:05:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:35,830 INFO L462 AbstractCegarLoop]: Abstraction has 6307 states and 8081 transitions. [2019-10-14 22:05:35,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 8081 transitions. [2019-10-14 22:05:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2019-10-14 22:05:35,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:35,844 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:36,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:36,052 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash 693084043, now seen corresponding path program 1 times [2019-10-14 22:05:36,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:36,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644910381] [2019-10-14 22:05:36,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:36,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:36,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 212 proven. 100 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-14 22:05:36,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644910381] [2019-10-14 22:05:36,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416802042] [2019-10-14 22:05:36,770 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 22:05:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:36,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:36,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 22:05:37,116 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:37,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:05:37,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546682721] [2019-10-14 22:05:37,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:37,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:37,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:37,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:37,119 INFO L87 Difference]: Start difference. First operand 6307 states and 8081 transitions. Second operand 11 states. [2019-10-14 22:05:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:44,911 INFO L93 Difference]: Finished difference Result 18273 states and 25286 transitions. [2019-10-14 22:05:44,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 22:05:44,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 504 [2019-10-14 22:05:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:44,979 INFO L225 Difference]: With dead ends: 18273 [2019-10-14 22:05:44,980 INFO L226 Difference]: Without dead ends: 11972 [2019-10-14 22:05:44,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 518 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-10-14 22:05:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11972 states. [2019-10-14 22:05:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11972 to 11246. [2019-10-14 22:05:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11246 states. [2019-10-14 22:05:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 14689 transitions. [2019-10-14 22:05:45,336 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 14689 transitions. Word has length 504 [2019-10-14 22:05:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:45,337 INFO L462 AbstractCegarLoop]: Abstraction has 11246 states and 14689 transitions. [2019-10-14 22:05:45,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 14689 transitions. [2019-10-14 22:05:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2019-10-14 22:05:45,390 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:45,390 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, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:45,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:45,594 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:45,595 INFO L82 PathProgramCache]: Analyzing trace with hash -599196249, now seen corresponding path program 1 times [2019-10-14 22:05:45,595 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:45,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750593747] [2019-10-14 22:05:45,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:45,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:45,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat