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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:13,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:13,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:13,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:13,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:13,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:13,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:13,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:13,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:13,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:13,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:13,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:13,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:13,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:13,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:13,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:13,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:13,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:13,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:13,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:13,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:13,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:13,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:13,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:13,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:06:13,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:13,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:13,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:13,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:13,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:13,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:13,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:13,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:13,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:13,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:13,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:13,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:06:13,100 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:13,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:13,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:13,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:13,103 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:13,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:13,103 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:13,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:13,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:13,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:13,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:13,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:13,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:13,104 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:13,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:13,105 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:13,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:13,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:13,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:13,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:13,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:13,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:13,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:13,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:13,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:13,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:13,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:13,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:13,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:13,381 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:13,401 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:13,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:13,409 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:13,409 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:13,410 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-10-13 18:06:13,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eaeae477/3d7f3a452f064486b19cf0a3dfca24d8/FLAG222ade97d [2019-10-13 18:06:14,192 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:14,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-10-13 18:06:14,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eaeae477/3d7f3a452f064486b19cf0a3dfca24d8/FLAG222ade97d [2019-10-13 18:06:14,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eaeae477/3d7f3a452f064486b19cf0a3dfca24d8 [2019-10-13 18:06:14,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:14,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:14,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:14,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:14,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:14,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@580da5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:14, skipping insertion in model container [2019-10-13 18:06:14,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:14" (1/1) ... [2019-10-13 18:06:14,351 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:14,430 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:15,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:15,462 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:15,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:15,711 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:15,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15 WrapperNode [2019-10-13 18:06:15,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:15,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:15,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:15,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:15,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (1/1) ... [2019-10-13 18:06:15,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (1/1) ... [2019-10-13 18:06:15,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (1/1) ... [2019-10-13 18:06:15,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (1/1) ... [2019-10-13 18:06:15,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (1/1) ... [2019-10-13 18:06:15,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (1/1) ... [2019-10-13 18:06:15,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (1/1) ... [2019-10-13 18:06:15,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:15,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:15,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:15,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:15,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:16,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:16,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:16,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:18,706 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:18,707 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:18,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:18 BoogieIcfgContainer [2019-10-13 18:06:18,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:18,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:18,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:18,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:18,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:14" (1/3) ... [2019-10-13 18:06:18,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611047d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:18, skipping insertion in model container [2019-10-13 18:06:18,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:15" (2/3) ... [2019-10-13 18:06:18,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611047d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:18, skipping insertion in model container [2019-10-13 18:06:18,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:18" (3/3) ... [2019-10-13 18:06:18,724 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label58.c [2019-10-13 18:06:18,735 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:18,745 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:18,757 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:18,803 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:18,803 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:18,804 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:18,804 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:18,804 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:18,804 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:18,804 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:18,804 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:06:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 18:06:18,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:18,866 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:18,869 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash -129772806, now seen corresponding path program 1 times [2019-10-13 18:06:18,892 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:18,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582339863] [2019-10-13 18:06:18,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:18,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:18,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:19,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582339863] [2019-10-13 18:06:19,436 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:19,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:19,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217275947] [2019-10-13 18:06:19,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:19,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:19,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:19,463 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:06:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:24,602 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:06:24,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:24,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-13 18:06:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:24,638 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:06:24,639 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:06:24,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:06:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:06:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:06:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-10-13 18:06:24,793 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 57 [2019-10-13 18:06:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:24,795 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-10-13 18:06:24,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-10-13 18:06:24,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-13 18:06:24,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:24,822 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2019-10-13 18:06:24,823 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1170986303, now seen corresponding path program 1 times [2019-10-13 18:06:24,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:24,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401161590] [2019-10-13 18:06:24,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:24,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:24,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 100 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:06:25,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401161590] [2019-10-13 18:06:25,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413561867] [2019-10-13 18:06:25,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:25,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:25,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 18:06:25,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:25,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:06:25,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215721656] [2019-10-13 18:06:25,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:25,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:25,573 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-10-13 18:06:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:28,763 INFO L93 Difference]: Finished difference Result 3131 states and 5147 transitions. [2019-10-13 18:06:28,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:06:28,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-10-13 18:06:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:28,778 INFO L225 Difference]: With dead ends: 3131 [2019-10-13 18:06:28,779 INFO L226 Difference]: Without dead ends: 2106 [2019-10-13 18:06:28,783 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-13 18:06:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078. [2019-10-13 18:06:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-10-13 18:06:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3239 transitions. [2019-10-13 18:06:28,861 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3239 transitions. Word has length 224 [2019-10-13 18:06:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:28,862 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3239 transitions. [2019-10-13 18:06:28,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3239 transitions. [2019-10-13 18:06:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-13 18:06:28,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:28,868 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2019-10-13 18:06:29,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:29,073 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:29,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1948862471, now seen corresponding path program 1 times [2019-10-13 18:06:29,075 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:29,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208198802] [2019-10-13 18:06:29,075 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:29,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:29,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 100 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:06:29,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208198802] [2019-10-13 18:06:29,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170400652] [2019-10-13 18:06:29,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:29,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:29,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 18:06:29,606 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:29,606 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:29,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109574542] [2019-10-13 18:06:29,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:29,608 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:29,609 INFO L87 Difference]: Start difference. First operand 2078 states and 3239 transitions. Second operand 5 states. [2019-10-13 18:06:32,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:32,482 INFO L93 Difference]: Finished difference Result 6302 states and 10079 transitions. [2019-10-13 18:06:32,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:06:32,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2019-10-13 18:06:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:32,507 INFO L225 Difference]: With dead ends: 6302 [2019-10-13 18:06:32,507 INFO L226 Difference]: Without dead ends: 4230 [2019-10-13 18:06:32,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:06:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-10-13 18:06:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-10-13 18:06:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-10-13 18:06:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5867 transitions. [2019-10-13 18:06:32,632 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5867 transitions. Word has length 228 [2019-10-13 18:06:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:32,633 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5867 transitions. [2019-10-13 18:06:32,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5867 transitions. [2019-10-13 18:06:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-10-13 18:06:32,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:32,643 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:32,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:32,855 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:32,856 INFO L82 PathProgramCache]: Analyzing trace with hash 151732998, now seen corresponding path program 1 times [2019-10-13 18:06:32,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:32,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259590442] [2019-10-13 18:06:32,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:32,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:32,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 231 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 18:06:33,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259590442] [2019-10-13 18:06:33,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104810107] [2019-10-13 18:06:33,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:33,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 354 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 18:06:33,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:33,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:06:33,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063164093] [2019-10-13 18:06:33,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:33,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:33,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:33,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:33,626 INFO L87 Difference]: Start difference. First operand 4208 states and 5867 transitions. Second operand 11 states. [2019-10-13 18:06:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:37,967 INFO L93 Difference]: Finished difference Result 10864 states and 15765 transitions. [2019-10-13 18:06:37,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:06:37,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 347 [2019-10-13 18:06:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:37,997 INFO L225 Difference]: With dead ends: 10864 [2019-10-13 18:06:37,997 INFO L226 Difference]: Without dead ends: 6662 [2019-10-13 18:06:38,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 354 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:06:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-10-13 18:06:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4591. [2019-10-13 18:06:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4591 states. [2019-10-13 18:06:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6444 transitions. [2019-10-13 18:06:38,137 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 6444 transitions. Word has length 347 [2019-10-13 18:06:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:38,138 INFO L462 AbstractCegarLoop]: Abstraction has 4591 states and 6444 transitions. [2019-10-13 18:06:38,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 6444 transitions. [2019-10-13 18:06:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2019-10-13 18:06:38,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:38,148 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:38,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:38,353 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2030428242, now seen corresponding path program 1 times [2019-10-13 18:06:38,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:38,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309948388] [2019-10-13 18:06:38,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:38,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:38,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 150 proven. 221 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-10-13 18:06:39,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309948388] [2019-10-13 18:06:39,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573601786] [2019-10-13 18:06:39,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:39,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:39,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-10-13 18:06:39,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:39,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:39,406 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610041076] [2019-10-13 18:06:39,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:39,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:39,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:39,408 INFO L87 Difference]: Start difference. First operand 4591 states and 6444 transitions. Second operand 5 states. [2019-10-13 18:06:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:42,357 INFO L93 Difference]: Finished difference Result 10581 states and 14860 transitions. [2019-10-13 18:06:42,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:06:42,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2019-10-13 18:06:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:42,385 INFO L225 Difference]: With dead ends: 10581 [2019-10-13 18:06:42,385 INFO L226 Difference]: Without dead ends: 5996 [2019-10-13 18:06:42,398 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 425 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2019-10-13 18:06:42,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5968. [2019-10-13 18:06:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5968 states. [2019-10-13 18:06:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7680 transitions. [2019-10-13 18:06:42,538 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 7680 transitions. Word has length 423 [2019-10-13 18:06:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:42,546 INFO L462 AbstractCegarLoop]: Abstraction has 5968 states and 7680 transitions. [2019-10-13 18:06:42,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 7680 transitions. [2019-10-13 18:06:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2019-10-13 18:06:42,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:42,564 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:42,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:42,769 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:42,770 INFO L82 PathProgramCache]: Analyzing trace with hash -603942422, now seen corresponding path program 1 times [2019-10-13 18:06:42,771 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:42,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032208032] [2019-10-13 18:06:42,771 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:42,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:42,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 266 proven. 114 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-13 18:06:43,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032208032] [2019-10-13 18:06:43,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505321086] [2019-10-13 18:06:43,805 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 [2019-10-13 18:06:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:44,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:44,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 443 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 18:06:44,391 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:44,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:44,392 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628701615] [2019-10-13 18:06:44,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:44,395 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:44,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:44,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:44,395 INFO L87 Difference]: Start difference. First operand 5968 states and 7680 transitions. Second operand 11 states.