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/Problem03_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:19,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:19,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:19,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:19,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:19,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:19,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:19,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:19,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:19,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:19,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:19,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:19,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:19,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:19,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:19,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:19,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:19,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:19,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:19,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:19,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:19,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:19,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:19,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:19,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:19,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:19,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:19,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:19,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:19,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:19,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:19,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:19,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:19,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:19,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:19,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:19,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:54:19,427 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:19,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:19,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:19,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:19,430 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:19,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:19,430 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:19,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:19,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:19,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:19,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:19,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:19,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:19,434 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:19,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:19,434 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:19,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:19,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:19,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:19,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:19,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:19,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:19,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:19,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:19,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:19,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:19,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:19,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:19,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:19,762 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:19,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:19,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:19,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:19,786 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:19,787 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-10-14 21:54:19,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dbd8f645/76e569597fde40c6b88ef4c0f427ac79/FLAG24f98af4d [2019-10-14 21:54:20,616 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:20,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-10-14 21:54:20,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dbd8f645/76e569597fde40c6b88ef4c0f427ac79/FLAG24f98af4d [2019-10-14 21:54:20,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dbd8f645/76e569597fde40c6b88ef4c0f427ac79 [2019-10-14 21:54:20,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:20,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:20,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:20,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:20,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:20,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:20" (1/1) ... [2019-10-14 21:54:20,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c49610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:20, skipping insertion in model container [2019-10-14 21:54:20,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:20" (1/1) ... [2019-10-14 21:54:20,811 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:20,889 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:21,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:21,702 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:22,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:22,084 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:22,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22 WrapperNode [2019-10-14 21:54:22,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:22,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:22,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:22,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:22,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:22,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:22,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:22,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:22,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:22,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:22,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:22,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:22,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:22,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:22,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:22,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:22,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:22,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:22,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:22,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:24,433 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:24,437 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:24,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:24 BoogieIcfgContainer [2019-10-14 21:54:24,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:24,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:24,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:24,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:24,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:20" (1/3) ... [2019-10-14 21:54:24,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590cffe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:24, skipping insertion in model container [2019-10-14 21:54:24,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (2/3) ... [2019-10-14 21:54:24,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590cffe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:24, skipping insertion in model container [2019-10-14 21:54:24,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:24" (3/3) ... [2019-10-14 21:54:24,512 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2019-10-14 21:54:24,527 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:24,543 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:24,559 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:24,615 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:24,615 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:24,616 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:24,616 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:24,616 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:24,617 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:24,617 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:24,617 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-14 21:54:24,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:24,690 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:24,695 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:24,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1944252984, now seen corresponding path program 1 times [2019-10-14 21:54:24,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:24,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016994493] [2019-10-14 21:54:24,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:24,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:24,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:25,618 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:25,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016994493] [2019-10-14 21:54:25,762 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:25,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:25,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044571035] [2019-10-14 21:54:25,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:25,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:25,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:25,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:25,788 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:25,988 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:29,270 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-10-14 21:54:29,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:54:29,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-10-14 21:54:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:29,310 INFO L225 Difference]: With dead ends: 845 [2019-10-14 21:54:29,311 INFO L226 Difference]: Without dead ends: 470 [2019-10-14 21:54:29,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-14 21:54:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-10-14 21:54:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-14 21:54:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-10-14 21:54:29,407 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 161 [2019-10-14 21:54:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:29,408 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-10-14 21:54:29,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:29,409 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-10-14 21:54:29,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-14 21:54:29,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:29,415 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:29,415 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1469747701, now seen corresponding path program 1 times [2019-10-14 21:54:29,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:29,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020121096] [2019-10-14 21:54:29,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:29,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:29,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:29,710 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:29,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020121096] [2019-10-14 21:54:29,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:29,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:29,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632914293] [2019-10-14 21:54:29,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:29,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:29,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:29,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:29,942 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-10-14 21:54:30,111 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:32,963 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:54:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:33,593 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-10-14 21:54:33,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:54:33,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 170 [2019-10-14 21:54:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:33,601 INFO L225 Difference]: With dead ends: 1407 [2019-10-14 21:54:33,601 INFO L226 Difference]: Without dead ends: 949 [2019-10-14 21:54:33,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:54:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-10-14 21:54:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-10-14 21:54:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-14 21:54:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-10-14 21:54:33,671 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 170 [2019-10-14 21:54:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:33,672 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-10-14 21:54:33,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-10-14 21:54:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 21:54:33,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:33,680 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:33,680 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:33,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash 931269084, now seen corresponding path program 1 times [2019-10-14 21:54:33,681 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:33,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695253372] [2019-10-14 21:54:33,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:33,973 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:34,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695253372] [2019-10-14 21:54:34,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747731053] [2019-10-14 21:54:34,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:54:34,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:34,447 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:34,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 21:54:34,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979128541] [2019-10-14 21:54:34,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:34,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:34,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:34,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:34,449 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-10-14 21:54:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:36,021 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-10-14 21:54:36,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:36,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2019-10-14 21:54:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:36,034 INFO L225 Difference]: With dead ends: 2749 [2019-10-14 21:54:36,034 INFO L226 Difference]: Without dead ends: 1850 [2019-10-14 21:54:36,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-10-14 21:54:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-10-14 21:54:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-14 21:54:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2877 transitions. [2019-10-14 21:54:36,134 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2877 transitions. Word has length 173 [2019-10-14 21:54:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:36,134 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2877 transitions. [2019-10-14 21:54:36,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2877 transitions. [2019-10-14 21:54:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 21:54:36,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:36,145 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:36,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:36,350 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash -771867422, now seen corresponding path program 1 times [2019-10-14 21:54:36,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:36,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309325666] [2019-10-14 21:54:36,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,578 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:54:36,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309325666] [2019-10-14 21:54:36,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500506765] [2019-10-14 21:54:36,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:54:36,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:54:37,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:37,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:54:37,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381586276] [2019-10-14 21:54:37,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:37,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:37,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:37,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:37,113 INFO L87 Difference]: Start difference. First operand 1816 states and 2877 transitions. Second operand 5 states. [2019-10-14 21:54:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:38,559 INFO L93 Difference]: Finished difference Result 5485 states and 9340 transitions. [2019-10-14 21:54:38,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:54:38,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-10-14 21:54:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:38,588 INFO L225 Difference]: With dead ends: 5485 [2019-10-14 21:54:38,589 INFO L226 Difference]: Without dead ends: 3675 [2019-10-14 21:54:38,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:54:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2019-10-14 21:54:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3599. [2019-10-14 21:54:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2019-10-14 21:54:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5610 transitions. [2019-10-14 21:54:38,746 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5610 transitions. Word has length 180 [2019-10-14 21:54:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:38,747 INFO L462 AbstractCegarLoop]: Abstraction has 3599 states and 5610 transitions. [2019-10-14 21:54:38,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5610 transitions. [2019-10-14 21:54:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-14 21:54:38,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:38,758 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:38,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:38,963 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:38,964 INFO L82 PathProgramCache]: Analyzing trace with hash -23696304, now seen corresponding path program 1 times [2019-10-14 21:54:38,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:38,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146240839] [2019-10-14 21:54:38,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:38,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:38,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,168 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:39,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146240839] [2019-10-14 21:54:39,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468368463] [2019-10-14 21:54:39,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:54:39,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:54:39,907 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:39,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:54:39,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120935572] [2019-10-14 21:54:39,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:54:39,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:39,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:54:39,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:39,910 INFO L87 Difference]: Start difference. First operand 3599 states and 5610 transitions. Second operand 11 states. [2019-10-14 21:54:40,121 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:40,426 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:40,823 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:41,223 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:54:43,550 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:51,633 INFO L93 Difference]: Finished difference Result 15053 states and 30169 transitions. [2019-10-14 21:54:51,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:54:51,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 191 [2019-10-14 21:54:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:51,753 INFO L225 Difference]: With dead ends: 15053 [2019-10-14 21:54:51,753 INFO L226 Difference]: Without dead ends: 11460 [2019-10-14 21:54:51,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:54:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-10-14 21:54:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 11174. [2019-10-14 21:54:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11174 states. [2019-10-14 21:54:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 18327 transitions. [2019-10-14 21:54:52,538 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 18327 transitions. Word has length 191 [2019-10-14 21:54:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:52,543 INFO L462 AbstractCegarLoop]: Abstraction has 11174 states and 18327 transitions. [2019-10-14 21:54:52,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:54:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 18327 transitions. [2019-10-14 21:54:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-14 21:54:52,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:52,609 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:52,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:52,823 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:52,824 INFO L82 PathProgramCache]: Analyzing trace with hash -124599840, now seen corresponding path program 1 times [2019-10-14 21:54:52,824 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:52,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697145073] [2019-10-14 21:54:52,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:52,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:52,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,084 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:53,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697145073] [2019-10-14 21:54:53,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596521362] [2019-10-14 21:54:53,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:53,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:54:53,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:53,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:54:53,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344844670] [2019-10-14 21:54:53,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:53,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:53,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:53,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:53,619 INFO L87 Difference]: Start difference. First operand 11174 states and 18327 transitions. Second operand 3 states. [2019-10-14 21:54:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:54,962 INFO L93 Difference]: Finished difference Result 32354 states and 54932 transitions. [2019-10-14 21:54:54,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:54,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 199 [2019-10-14 21:54:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:55,082 INFO L225 Difference]: With dead ends: 32354 [2019-10-14 21:54:55,082 INFO L226 Difference]: Without dead ends: 21186 [2019-10-14 21:54:55,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21186 states. [2019-10-14 21:54:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21186 to 21088. [2019-10-14 21:54:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21088 states.