java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:57:04,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:57:04,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:57:04,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:57:04,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:57:04,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:57:04,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:57:04,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:57:04,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:57:04,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:57:04,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:57:04,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:57:04,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:57:04,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:57:04,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:57:04,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:57:04,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:57:04,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:57:04,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:57:04,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:57:04,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:57:04,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:57:04,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:57:04,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:57:04,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:57:04,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:57:04,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:57:04,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:57:04,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:57:04,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:57:04,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:57:04,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:57:04,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:57:04,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:57:04,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:57:04,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:57:04,557 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 21:57:04,572 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:57:04,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:57:04,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:57:04,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:57:04,574 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:57:04,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:57:04,574 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:57:04,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:57:04,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:57:04,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:57:04,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:57:04,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:57:04,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:57:04,576 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:57:04,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:57:04,576 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:57:04,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:57:04,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:57:04,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:57:04,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:57:04,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:57:04,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:57:04,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:57:04,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:57:04,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:57:04,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:57:04,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:57:04,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:57:04,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:57:04,921 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:57:04,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:57:04,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:57:04,948 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:57:04,948 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:57:04,949 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-10-14 21:57:05,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4de2fa94/bcc66ba0083343269bc756686341ed28/FLAG420832a86 [2019-10-14 21:57:05,626 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:57:05,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-10-14 21:57:05,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4de2fa94/bcc66ba0083343269bc756686341ed28/FLAG420832a86 [2019-10-14 21:57:05,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4de2fa94/bcc66ba0083343269bc756686341ed28 [2019-10-14 21:57:05,894 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:57:05,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:57:05,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:57:05,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:57:05,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:57:05,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:57:05" (1/1) ... [2019-10-14 21:57:05,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:05, skipping insertion in model container [2019-10-14 21:57:05,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:57:05" (1/1) ... [2019-10-14 21:57:05,914 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:57:05,980 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:57:06,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:57:06,665 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:57:06,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:57:06,824 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:57:06,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06 WrapperNode [2019-10-14 21:57:06,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:57:06,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:57:06,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:57:06,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:57:06,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (1/1) ... [2019-10-14 21:57:06,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (1/1) ... [2019-10-14 21:57:06,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (1/1) ... [2019-10-14 21:57:06,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (1/1) ... [2019-10-14 21:57:06,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (1/1) ... [2019-10-14 21:57:06,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (1/1) ... [2019-10-14 21:57:06,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (1/1) ... [2019-10-14 21:57:06,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:57:06,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:57:06,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:57:06,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:57:06,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (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 21:57:07,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:57:07,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:57:07,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:57:07,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:57:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:57:07,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:57:07,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:57:07,027 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:57:07,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:57:07,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:57:07,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:57:08,288 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:57:08,288 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:57:08,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:57:08 BoogieIcfgContainer [2019-10-14 21:57:08,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:57:08,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:57:08,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:57:08,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:57:08,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:57:05" (1/3) ... [2019-10-14 21:57:08,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743f412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:57:08, skipping insertion in model container [2019-10-14 21:57:08,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:06" (2/3) ... [2019-10-14 21:57:08,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743f412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:57:08, skipping insertion in model container [2019-10-14 21:57:08,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:57:08" (3/3) ... [2019-10-14 21:57:08,299 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label25.c [2019-10-14 21:57:08,309 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:57:08,318 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:57:08,330 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:57:08,359 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:57:08,359 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:57:08,359 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:57:08,360 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:57:08,360 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:57:08,360 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:57:08,360 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:57:08,360 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:57:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:57:08,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 21:57:08,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:08,400 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] [2019-10-14 21:57:08,402 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:08,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1015003737, now seen corresponding path program 1 times [2019-10-14 21:57:08,418 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:08,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637226830] [2019-10-14 21:57:08,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:08,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:08,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,881 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 21:57:08,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637226830] [2019-10-14 21:57:08,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:08,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:57:08,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417298143] [2019-10-14 21:57:08,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:08,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:08,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:08,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:57:08,907 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:57:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:11,009 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2019-10-14 21:57:11,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:11,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2019-10-14 21:57:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:11,030 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:57:11,031 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:57:11,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:57:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-14 21:57:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-14 21:57:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 595 transitions. [2019-10-14 21:57:11,122 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 595 transitions. Word has length 70 [2019-10-14 21:57:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:11,122 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 595 transitions. [2019-10-14 21:57:11,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 595 transitions. [2019-10-14 21:57:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 21:57:11,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:11,131 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:11,132 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1516573211, now seen corresponding path program 1 times [2019-10-14 21:57:11,132 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:11,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673025085] [2019-10-14 21:57:11,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:11,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:11,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:11,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673025085] [2019-10-14 21:57:11,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314253300] [2019-10-14 21:57:11,429 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 21:57:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:11,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:11,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:11,681 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:11,681 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:57:11,681 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169720705] [2019-10-14 21:57:11,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:57:11,685 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:11,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:57:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:11,686 INFO L87 Difference]: Start difference. First operand 443 states and 595 transitions. Second operand 3 states. [2019-10-14 21:57:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:12,374 INFO L93 Difference]: Finished difference Result 880 states and 1198 transitions. [2019-10-14 21:57:12,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:57:12,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-14 21:57:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:12,390 INFO L225 Difference]: With dead ends: 880 [2019-10-14 21:57:12,390 INFO L226 Difference]: Without dead ends: 878 [2019-10-14 21:57:12,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2019-10-14 21:57:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 735. [2019-10-14 21:57:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2019-10-14 21:57:12,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1029 transitions. [2019-10-14 21:57:12,452 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1029 transitions. Word has length 149 [2019-10-14 21:57:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:12,453 INFO L462 AbstractCegarLoop]: Abstraction has 735 states and 1029 transitions. [2019-10-14 21:57:12,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:57:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1029 transitions. [2019-10-14 21:57:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-14 21:57:12,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:12,465 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:12,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:12,670 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:12,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2032612418, now seen corresponding path program 1 times [2019-10-14 21:57:12,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:12,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885279510] [2019-10-14 21:57:12,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:12,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:12,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:13,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885279510] [2019-10-14 21:57:13,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:13,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:57:13,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712095436] [2019-10-14 21:57:13,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:57:13,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:13,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:57:13,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:57:13,127 INFO L87 Difference]: Start difference. First operand 735 states and 1029 transitions. Second operand 9 states. [2019-10-14 21:57:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:14,760 INFO L93 Difference]: Finished difference Result 1790 states and 2576 transitions. [2019-10-14 21:57:14,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:57:14,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 192 [2019-10-14 21:57:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:14,767 INFO L225 Difference]: With dead ends: 1790 [2019-10-14 21:57:14,767 INFO L226 Difference]: Without dead ends: 1061 [2019-10-14 21:57:14,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2019-10-14 21:57:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1035. [2019-10-14 21:57:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1035 states. [2019-10-14 21:57:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1359 transitions. [2019-10-14 21:57:14,810 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1359 transitions. Word has length 192 [2019-10-14 21:57:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:14,811 INFO L462 AbstractCegarLoop]: Abstraction has 1035 states and 1359 transitions. [2019-10-14 21:57:14,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:57:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1359 transitions. [2019-10-14 21:57:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 21:57:14,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:14,816 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 21:57:14,816 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2039130987, now seen corresponding path program 1 times [2019-10-14 21:57:14,817 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:14,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22123781] [2019-10-14 21:57:14,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:14,818 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:14,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:15,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22123781] [2019-10-14 21:57:15,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350637464] [2019-10-14 21:57:15,154 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 21:57:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:15,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:15,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:15,363 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:15,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:57:15,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973072752] [2019-10-14 21:57:15,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:57:15,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:15,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:57:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:15,366 INFO L87 Difference]: Start difference. First operand 1035 states and 1359 transitions. Second operand 11 states. [2019-10-14 21:57:18,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:18,506 INFO L93 Difference]: Finished difference Result 2601 states and 3691 transitions. [2019-10-14 21:57:18,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:57:18,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 222 [2019-10-14 21:57:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:18,520 INFO L225 Difference]: With dead ends: 2601 [2019-10-14 21:57:18,520 INFO L226 Difference]: Without dead ends: 1572 [2019-10-14 21:57:18,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:57:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2019-10-14 21:57:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1240. [2019-10-14 21:57:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2019-10-14 21:57:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1602 transitions. [2019-10-14 21:57:18,612 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1602 transitions. Word has length 222 [2019-10-14 21:57:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:18,612 INFO L462 AbstractCegarLoop]: Abstraction has 1240 states and 1602 transitions. [2019-10-14 21:57:18,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:57:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1602 transitions. [2019-10-14 21:57:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-10-14 21:57:18,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:18,620 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:18,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:18,825 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1907264308, now seen corresponding path program 1 times [2019-10-14 21:57:18,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:18,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709576900] [2019-10-14 21:57:18,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:18,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:18,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 200 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:19,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709576900] [2019-10-14 21:57:19,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152080440] [2019-10-14 21:57:19,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:19,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:19,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:19,414 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:19,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:57:19,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863990037] [2019-10-14 21:57:19,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:57:19,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:19,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:57:19,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:19,417 INFO L87 Difference]: Start difference. First operand 1240 states and 1602 transitions. Second operand 11 states. [2019-10-14 21:57:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:21,365 INFO L93 Difference]: Finished difference Result 2466 states and 3171 transitions. [2019-10-14 21:57:21,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:57:21,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 229 [2019-10-14 21:57:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:21,373 INFO L225 Difference]: With dead ends: 2466 [2019-10-14 21:57:21,374 INFO L226 Difference]: Without dead ends: 1232 [2019-10-14 21:57:21,379 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:57:21,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-10-14 21:57:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1208. [2019-10-14 21:57:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-14 21:57:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1475 transitions. [2019-10-14 21:57:21,416 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1475 transitions. Word has length 229 [2019-10-14 21:57:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:21,420 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1475 transitions. [2019-10-14 21:57:21,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:57:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1475 transitions. [2019-10-14 21:57:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-10-14 21:57:21,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:21,426 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:21,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:21,635 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1889340864, now seen corresponding path program 1 times [2019-10-14 21:57:21,635 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:21,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834451598] [2019-10-14 21:57:21,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:21,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:21,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 202 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:21,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834451598] [2019-10-14 21:57:21,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224596929] [2019-10-14 21:57:21,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:22,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:57:22,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:57:22,261 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:22,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2019-10-14 21:57:22,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467106710] [2019-10-14 21:57:22,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:22,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:22,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:22,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:57:22,263 INFO L87 Difference]: Start difference. First operand 1208 states and 1475 transitions. Second operand 5 states. [2019-10-14 21:57:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:23,176 INFO L93 Difference]: Finished difference Result 2583 states and 3144 transitions. [2019-10-14 21:57:23,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:23,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 239 [2019-10-14 21:57:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:23,186 INFO L225 Difference]: With dead ends: 2583 [2019-10-14 21:57:23,186 INFO L226 Difference]: Without dead ends: 1381 [2019-10-14 21:57:23,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2019-10-14 21:57:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1355. [2019-10-14 21:57:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1355 states. [2019-10-14 21:57:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1633 transitions. [2019-10-14 21:57:23,233 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1633 transitions. Word has length 239 [2019-10-14 21:57:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:23,234 INFO L462 AbstractCegarLoop]: Abstraction has 1355 states and 1633 transitions. [2019-10-14 21:57:23,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1633 transitions. [2019-10-14 21:57:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2019-10-14 21:57:23,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:23,241 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:23,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:23,446 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:23,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1720584130, now seen corresponding path program 1 times [2019-10-14 21:57:23,448 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:23,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177798563] [2019-10-14 21:57:23,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:23,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:23,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 266 proven. 84 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 21:57:23,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177798563] [2019-10-14 21:57:23,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055243905] [2019-10-14 21:57:23,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:24,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:24,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 363 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:57:24,214 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:24,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-14 21:57:24,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007822399] [2019-10-14 21:57:24,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:57:24,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:57:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:57:24,218 INFO L87 Difference]: Start difference. First operand 1355 states and 1633 transitions. Second operand 13 states. [2019-10-14 21:57:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:27,819 INFO L93 Difference]: Finished difference Result 4160 states and 5073 transitions. [2019-10-14 21:57:27,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:57:27,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 318 [2019-10-14 21:57:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:27,827 INFO L225 Difference]: With dead ends: 4160 [2019-10-14 21:57:27,827 INFO L226 Difference]: Without dead ends: 1780 [2019-10-14 21:57:27,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:57:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2019-10-14 21:57:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1343. [2019-10-14 21:57:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2019-10-14 21:57:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1491 transitions. [2019-10-14 21:57:27,866 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1491 transitions. Word has length 318 [2019-10-14 21:57:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:27,866 INFO L462 AbstractCegarLoop]: Abstraction has 1343 states and 1491 transitions. [2019-10-14 21:57:27,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:57:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1491 transitions. [2019-10-14 21:57:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-10-14 21:57:27,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:27,875 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, 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, 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] [2019-10-14 21:57:28,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:28,079 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:28,080 INFO L82 PathProgramCache]: Analyzing trace with hash -703978038, now seen corresponding path program 1 times [2019-10-14 21:57:28,080 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:28,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057019988] [2019-10-14 21:57:28,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:28,081 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:28,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 145 proven. 291 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:57:28,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057019988] [2019-10-14 21:57:28,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335732377] [2019-10-14 21:57:28,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:28,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:57:28,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:29,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:29,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:29,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:29,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:29,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:29,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:29,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:29,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms