/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:35:26,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:35:26,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:35:26,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:35:26,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:35:26,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:35:26,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:35:26,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:35:26,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:35:26,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:35:26,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:35:26,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:35:26,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:35:26,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:35:26,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:35:26,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:35:26,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:35:26,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:35:26,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:35:26,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:35:26,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:35:26,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:35:26,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:35:26,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:35:26,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:35:26,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:35:26,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:35:26,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:35:26,721 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 [2020-07-20 11:35:26,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:35:26,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:35:26,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:35:26,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:35:26,738 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:35:26,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:35:26,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:35:26,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:35:26,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:35:26,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:35:26,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:35:26,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:35:26,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:35:26,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:35:26,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:35:26,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:35:26,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:35:26,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:35:26,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:35:26,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:35:26,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:35:26,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:35:26,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:35:26,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:35:26,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:35:26,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:35:26,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:26,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:35:26,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:35:26,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:35:27,009 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:35:27,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:35:27,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:35:27,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:35:27,034 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:35:27,034 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2020-07-20 11:35:27,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8f3f9fc/15a821dbea7b4919b48141488c2c50a4/FLAG0f703c606 [2020-07-20 11:35:27,737 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:35:27,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2020-07-20 11:35:27,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8f3f9fc/15a821dbea7b4919b48141488c2c50a4/FLAG0f703c606 [2020-07-20 11:35:27,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8f3f9fc/15a821dbea7b4919b48141488c2c50a4 [2020-07-20 11:35:28,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:35:28,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:35:28,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:35:28,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:35:28,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:35:28,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:35:27" (1/1) ... [2020-07-20 11:35:28,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c60ed20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28, skipping insertion in model container [2020-07-20 11:35:28,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:35:27" (1/1) ... [2020-07-20 11:35:28,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:35:28,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:35:28,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:35:28,721 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:35:28,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:35:28,851 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:35:28,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28 WrapperNode [2020-07-20 11:35:28,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:35:28,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:35:28,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:35:28,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:35:28,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (1/1) ... [2020-07-20 11:35:28,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (1/1) ... [2020-07-20 11:35:28,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (1/1) ... [2020-07-20 11:35:28,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (1/1) ... [2020-07-20 11:35:28,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (1/1) ... [2020-07-20 11:35:28,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (1/1) ... [2020-07-20 11:35:28,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (1/1) ... [2020-07-20 11:35:28,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:35:28,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:35:28,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:35:28,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:35:28,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (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 [2020-07-20 11:35:29,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:35:29,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:35:29,063 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-20 11:35:29,063 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:35:29,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-20 11:35:29,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:35:29,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:35:29,066 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:35:29,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:35:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:35:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:35:30,194 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:35:30,194 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:35:30,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:35:30 BoogieIcfgContainer [2020-07-20 11:35:30,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:35:30,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:35:30,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:35:30,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:35:30,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:35:27" (1/3) ... [2020-07-20 11:35:30,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4444e68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:35:30, skipping insertion in model container [2020-07-20 11:35:30,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:35:28" (2/3) ... [2020-07-20 11:35:30,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4444e68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:35:30, skipping insertion in model container [2020-07-20 11:35:30,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:35:30" (3/3) ... [2020-07-20 11:35:30,212 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label25.c [2020-07-20 11:35:30,223 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:35:30,231 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:35:30,245 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:35:30,271 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:35:30,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:35:30,272 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:35:30,272 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:35:30,272 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:35:30,272 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:35:30,272 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:35:30,273 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:35:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2020-07-20 11:35:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-20 11:35:30,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:35:30,312 INFO L422 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] [2020-07-20 11:35:30,313 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:35:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:35:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash 167533094, now seen corresponding path program 1 times [2020-07-20 11:35:30,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:35:30,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663705083] [2020-07-20 11:35:30,329 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:35:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:35:30,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:35:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:30,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:35:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663705083] [2020-07-20 11:35:30,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:35:30,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:35:30,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258772618] [2020-07-20 11:35:30,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:35:30,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:35:30,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:35:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:35:30,651 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2020-07-20 11:35:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:35:31,541 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2020-07-20 11:35:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:35:31,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2020-07-20 11:35:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:35:31,561 INFO L225 Difference]: With dead ends: 615 [2020-07-20 11:35:31,561 INFO L226 Difference]: Without dead ends: 317 [2020-07-20 11:35:31,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:35:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-07-20 11:35:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2020-07-20 11:35:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-07-20 11:35:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2020-07-20 11:35:31,644 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 140 [2020-07-20 11:35:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:35:31,646 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2020-07-20 11:35:31,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:35:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2020-07-20 11:35:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-07-20 11:35:31,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:35:31,653 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 11:35:31,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:31,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:35:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:35:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1307289931, now seen corresponding path program 1 times [2020-07-20 11:35:31,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:35:31,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764762177] [2020-07-20 11:35:31,870 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:35:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:35:31,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:35:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:32,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:35:32,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764762177] [2020-07-20 11:35:32,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:35:32,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:35:32,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60967330] [2020-07-20 11:35:32,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:35:32,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:35:32,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:35:32,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:35:32,058 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 5 states. [2020-07-20 11:35:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:35:32,565 INFO L93 Difference]: Finished difference Result 629 states and 962 transitions. [2020-07-20 11:35:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:35:32,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-07-20 11:35:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:35:32,571 INFO L225 Difference]: With dead ends: 629 [2020-07-20 11:35:32,572 INFO L226 Difference]: Without dead ends: 318 [2020-07-20 11:35:32,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:35:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-07-20 11:35:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 308. [2020-07-20 11:35:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-20 11:35:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 435 transitions. [2020-07-20 11:35:32,604 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 435 transitions. Word has length 155 [2020-07-20 11:35:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:35:32,605 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 435 transitions. [2020-07-20 11:35:32,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:35:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 435 transitions. [2020-07-20 11:35:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-20 11:35:32,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:35:32,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:35:32,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:32,834 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:35:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:35:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1498251582, now seen corresponding path program 1 times [2020-07-20 11:35:32,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:35:32,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127714842] [2020-07-20 11:35:32,837 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:35:32,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:35:32,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:35:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:33,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:35:33,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127714842] [2020-07-20 11:35:33,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:35:33,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:35:33,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531666301] [2020-07-20 11:35:33,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:35:33,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:35:33,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:35:33,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:35:33,060 INFO L87 Difference]: Start difference. First operand 308 states and 435 transitions. Second operand 5 states. [2020-07-20 11:35:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:35:33,888 INFO L93 Difference]: Finished difference Result 923 states and 1328 transitions. [2020-07-20 11:35:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:35:33,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-07-20 11:35:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:35:33,900 INFO L225 Difference]: With dead ends: 923 [2020-07-20 11:35:33,900 INFO L226 Difference]: Without dead ends: 621 [2020-07-20 11:35:33,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:35:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-07-20 11:35:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 459. [2020-07-20 11:35:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-07-20 11:35:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 601 transitions. [2020-07-20 11:35:33,952 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 601 transitions. Word has length 162 [2020-07-20 11:35:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:35:33,953 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 601 transitions. [2020-07-20 11:35:33,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:35:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 601 transitions. [2020-07-20 11:35:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-07-20 11:35:33,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:35:33,962 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:35:34,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:34,178 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:35:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:35:34,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1049640465, now seen corresponding path program 1 times [2020-07-20 11:35:34,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:35:34,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128651254] [2020-07-20 11:35:34,181 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:35:34,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:35:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:35:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:34,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:35:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:34,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128651254] [2020-07-20 11:35:34,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:35:34,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 11:35:34,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952776514] [2020-07-20 11:35:34,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:35:34,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:35:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:35:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:35:34,454 INFO L87 Difference]: Start difference. First operand 459 states and 601 transitions. Second operand 6 states. [2020-07-20 11:35:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:35:35,391 INFO L93 Difference]: Finished difference Result 1075 states and 1439 transitions. [2020-07-20 11:35:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:35:35,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 171 [2020-07-20 11:35:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:35:35,396 INFO L225 Difference]: With dead ends: 1075 [2020-07-20 11:35:35,396 INFO L226 Difference]: Without dead ends: 622 [2020-07-20 11:35:35,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:35:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-07-20 11:35:35,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 612. [2020-07-20 11:35:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-07-20 11:35:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 802 transitions. [2020-07-20 11:35:35,420 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 802 transitions. Word has length 171 [2020-07-20 11:35:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:35:35,420 INFO L479 AbstractCegarLoop]: Abstraction has 612 states and 802 transitions. [2020-07-20 11:35:35,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:35:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 802 transitions. [2020-07-20 11:35:35,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-07-20 11:35:35,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:35:35,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-07-20 11:35:35,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:35,639 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:35:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:35:35,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1868563865, now seen corresponding path program 1 times [2020-07-20 11:35:35,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:35:35,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150377742] [2020-07-20 11:35:35,642 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:35:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:35:35,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:35:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 11:35:35,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:35:35,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150377742] [2020-07-20 11:35:35,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:35:35,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:35:35,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741101985] [2020-07-20 11:35:35,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:35:35,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:35:35,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:35:35,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:35:35,789 INFO L87 Difference]: Start difference. First operand 612 states and 802 transitions. Second operand 3 states. [2020-07-20 11:35:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:35:36,355 INFO L93 Difference]: Finished difference Result 1660 states and 2197 transitions. [2020-07-20 11:35:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:35:36,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2020-07-20 11:35:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:35:36,368 INFO L225 Difference]: With dead ends: 1660 [2020-07-20 11:35:36,368 INFO L226 Difference]: Without dead ends: 1054 [2020-07-20 11:35:36,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:35:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2020-07-20 11:35:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 904. [2020-07-20 11:35:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-07-20 11:35:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1166 transitions. [2020-07-20 11:35:36,420 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1166 transitions. Word has length 175 [2020-07-20 11:35:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:35:36,422 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1166 transitions. [2020-07-20 11:35:36,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:35:36,422 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1166 transitions. [2020-07-20 11:35:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-07-20 11:35:36,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:35:36,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:35:36,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:36,669 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:35:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:35:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash 980159967, now seen corresponding path program 1 times [2020-07-20 11:35:36,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:35:36,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209076409] [2020-07-20 11:35:36,671 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:35:36,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:35:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:35:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:36,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:35:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:36,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209076409] [2020-07-20 11:35:36,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:35:36,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 11:35:36,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333043536] [2020-07-20 11:35:36,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:35:36,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:35:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:35:36,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:35:36,889 INFO L87 Difference]: Start difference. First operand 904 states and 1166 transitions. Second operand 7 states. [2020-07-20 11:35:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:35:38,452 INFO L93 Difference]: Finished difference Result 2551 states and 3430 transitions. [2020-07-20 11:35:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:35:38,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 179 [2020-07-20 11:35:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:35:38,478 INFO L225 Difference]: With dead ends: 2551 [2020-07-20 11:35:38,478 INFO L226 Difference]: Without dead ends: 1653 [2020-07-20 11:35:38,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:35:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2020-07-20 11:35:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1648. [2020-07-20 11:35:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-07-20 11:35:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2069 transitions. [2020-07-20 11:35:38,544 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2069 transitions. Word has length 179 [2020-07-20 11:35:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:35:38,545 INFO L479 AbstractCegarLoop]: Abstraction has 1648 states and 2069 transitions. [2020-07-20 11:35:38,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:35:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2069 transitions. [2020-07-20 11:35:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-20 11:35:38,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:35:38,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:35:38,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:38,766 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:35:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:35:38,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1251854217, now seen corresponding path program 1 times [2020-07-20 11:35:38,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:35:38,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480011262] [2020-07-20 11:35:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:35:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:35:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:35:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:38,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:35:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:35:39,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480011262] [2020-07-20 11:35:39,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:35:39,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 11:35:39,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887095519] [2020-07-20 11:35:39,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:35:39,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:35:39,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:35:39,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:35:39,031 INFO L87 Difference]: Start difference. First operand 1648 states and 2069 transitions. Second operand 7 states. [2020-07-20 11:35:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:35:39,863 INFO L93 Difference]: Finished difference Result 3753 states and 4818 transitions. [2020-07-20 11:35:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:35:39,863 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 191 [2020-07-20 11:35:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:35:39,877 INFO L225 Difference]: With dead ends: 3753 [2020-07-20 11:35:39,877 INFO L226 Difference]: Without dead ends: 2115 [2020-07-20 11:35:39,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 376 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:35:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2020-07-20 11:35:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1958. [2020-07-20 11:35:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1958 states. [2020-07-20 11:35:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2457 transitions. [2020-07-20 11:35:39,953 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2457 transitions. Word has length 191 [2020-07-20 11:35:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:35:39,954 INFO L479 AbstractCegarLoop]: Abstraction has 1958 states and 2457 transitions. [2020-07-20 11:35:39,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:35:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2457 transitions. [2020-07-20 11:35:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 11:35:39,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:35:39,961 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:35:40,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:40,175 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:35:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:35:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1249114084, now seen corresponding path program 1 times [2020-07-20 11:35:40,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:35:40,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217160237] [2020-07-20 11:35:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:35:40,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:35:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:35:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 11:35:40,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:35:40,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217160237] [2020-07-20 11:35:40,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:35:40,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:35:40,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686329349] [2020-07-20 11:35:40,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:35:40,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:35:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:35:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:35:40,356 INFO L87 Difference]: Start difference. First operand 1958 states and 2457 transitions. Second operand 3 states. [2020-07-20 11:35:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:35:40,939 INFO L93 Difference]: Finished difference Result 3474 states and 4329 transitions. [2020-07-20 11:35:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:35:40,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 199 [2020-07-20 11:35:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:35:40,941 INFO L225 Difference]: With dead ends: 3474 [2020-07-20 11:35:40,941 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:35:40,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:35:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:35:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:35:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:35:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:35:40,952 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 199 [2020-07-20 11:35:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:35:40,952 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:35:40,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:35:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:35:40,953 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:35:41,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:35:41,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:35:41,819 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-07-20 11:35:42,031 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-07-20 11:35:42,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:35:42,035 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (<= ~a17~0 |old(~a17~0)|) (<= ~a28~0 |old(~a28~0)|) (<= |old(~a28~0)| ~a28~0)) [2020-07-20 11:35:42,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:35:42,036 INFO L268 CegarLoopResult]: For program point L564-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,036 INFO L268 CegarLoopResult]: For program point L531-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,036 INFO L268 CegarLoopResult]: For program point L498-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,036 INFO L268 CegarLoopResult]: For program point L465-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,036 INFO L268 CegarLoopResult]: For program point L432-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,036 INFO L268 CegarLoopResult]: For program point L234(lines 234 413) no Hoare annotation was computed. [2020-07-20 11:35:42,037 INFO L268 CegarLoopResult]: For program point L69(lines 69 413) no Hoare annotation was computed. [2020-07-20 11:35:42,037 INFO L268 CegarLoopResult]: For program point L565(line 565) no Hoare annotation was computed. [2020-07-20 11:35:42,037 INFO L268 CegarLoopResult]: For program point L532(line 532) no Hoare annotation was computed. [2020-07-20 11:35:42,037 INFO L268 CegarLoopResult]: For program point L499(line 499) no Hoare annotation was computed. [2020-07-20 11:35:42,037 INFO L268 CegarLoopResult]: For program point L466(line 466) no Hoare annotation was computed. [2020-07-20 11:35:42,038 INFO L268 CegarLoopResult]: For program point L433(line 433) no Hoare annotation was computed. [2020-07-20 11:35:42,038 INFO L268 CegarLoopResult]: For program point L202(lines 202 413) no Hoare annotation was computed. [2020-07-20 11:35:42,038 INFO L268 CegarLoopResult]: For program point L169(lines 169 413) no Hoare annotation was computed. [2020-07-20 11:35:42,038 INFO L268 CegarLoopResult]: For program point L368(lines 368 413) no Hoare annotation was computed. [2020-07-20 11:35:42,038 INFO L268 CegarLoopResult]: For program point L203(lines 203 210) no Hoare annotation was computed. [2020-07-20 11:35:42,038 INFO L268 CegarLoopResult]: For program point L203-2(lines 203 210) no Hoare annotation was computed. [2020-07-20 11:35:42,039 INFO L268 CegarLoopResult]: For program point L38(lines 38 413) no Hoare annotation was computed. [2020-07-20 11:35:42,039 INFO L268 CegarLoopResult]: For program point L567-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,039 INFO L268 CegarLoopResult]: For program point L534-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,039 INFO L268 CegarLoopResult]: For program point L501-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,039 INFO L268 CegarLoopResult]: For program point L468-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,039 INFO L268 CegarLoopResult]: For program point L402(lines 402 413) no Hoare annotation was computed. [2020-07-20 11:35:42,039 INFO L268 CegarLoopResult]: For program point L435-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,040 INFO L268 CegarLoopResult]: For program point L237(lines 237 413) no Hoare annotation was computed. [2020-07-20 11:35:42,040 INFO L268 CegarLoopResult]: For program point L568(line 568) no Hoare annotation was computed. [2020-07-20 11:35:42,040 INFO L268 CegarLoopResult]: For program point L535(line 535) no Hoare annotation was computed. [2020-07-20 11:35:42,040 INFO L268 CegarLoopResult]: For program point L502(line 502) no Hoare annotation was computed. [2020-07-20 11:35:42,040 INFO L268 CegarLoopResult]: For program point L469(line 469) no Hoare annotation was computed. [2020-07-20 11:35:42,040 INFO L268 CegarLoopResult]: For program point L436(line 436) no Hoare annotation was computed. [2020-07-20 11:35:42,040 INFO L268 CegarLoopResult]: For program point L337(lines 337 413) no Hoare annotation was computed. [2020-07-20 11:35:42,041 INFO L268 CegarLoopResult]: For program point L238(lines 238 246) no Hoare annotation was computed. [2020-07-20 11:35:42,041 INFO L268 CegarLoopResult]: For program point L238-2(lines 238 246) no Hoare annotation was computed. [2020-07-20 11:35:42,041 INFO L268 CegarLoopResult]: For program point L139(lines 139 413) no Hoare annotation was computed. [2020-07-20 11:35:42,041 INFO L268 CegarLoopResult]: For program point L106(lines 106 413) no Hoare annotation was computed. [2020-07-20 11:35:42,041 INFO L268 CegarLoopResult]: For program point L404(lines 404 413) no Hoare annotation was computed. [2020-07-20 11:35:42,041 INFO L268 CegarLoopResult]: For program point L338(lines 338 347) no Hoare annotation was computed. [2020-07-20 11:35:42,041 INFO L268 CegarLoopResult]: For program point L338-2(lines 338 347) no Hoare annotation was computed. [2020-07-20 11:35:42,041 INFO L268 CegarLoopResult]: For program point L74(lines 74 413) no Hoare annotation was computed. [2020-07-20 11:35:42,042 INFO L268 CegarLoopResult]: For program point L570-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,042 INFO L268 CegarLoopResult]: For program point L537-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,042 INFO L268 CegarLoopResult]: For program point L504-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,042 INFO L268 CegarLoopResult]: For program point L471-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,042 INFO L268 CegarLoopResult]: For program point L438-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,042 INFO L268 CegarLoopResult]: For program point calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION(line 574) no Hoare annotation was computed. [2020-07-20 11:35:42,042 INFO L268 CegarLoopResult]: For program point L75(lines 75 80) no Hoare annotation was computed. [2020-07-20 11:35:42,043 INFO L268 CegarLoopResult]: For program point L42(lines 42 413) no Hoare annotation was computed. [2020-07-20 11:35:42,043 INFO L268 CegarLoopResult]: For program point L75-2(lines 75 80) no Hoare annotation was computed. [2020-07-20 11:35:42,043 INFO L268 CegarLoopResult]: For program point L571(line 571) no Hoare annotation was computed. [2020-07-20 11:35:42,043 INFO L268 CegarLoopResult]: For program point L538(line 538) no Hoare annotation was computed. [2020-07-20 11:35:42,043 INFO L268 CegarLoopResult]: For program point L505(line 505) no Hoare annotation was computed. [2020-07-20 11:35:42,043 INFO L268 CegarLoopResult]: For program point L472(line 472) no Hoare annotation was computed. [2020-07-20 11:35:42,043 INFO L268 CegarLoopResult]: For program point L439(line 439) no Hoare annotation was computed. [2020-07-20 11:35:42,043 INFO L268 CegarLoopResult]: For program point L175(lines 175 413) no Hoare annotation was computed. [2020-07-20 11:35:42,044 INFO L268 CegarLoopResult]: For program point L407(lines 407 413) no Hoare annotation was computed. [2020-07-20 11:35:42,044 INFO L268 CegarLoopResult]: For program point L143(lines 143 413) no Hoare annotation was computed. [2020-07-20 11:35:42,044 INFO L268 CegarLoopResult]: For program point L573-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,044 INFO L268 CegarLoopResult]: For program point L540-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,044 INFO L268 CegarLoopResult]: For program point L507-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,044 INFO L268 CegarLoopResult]: For program point L474-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,044 INFO L268 CegarLoopResult]: For program point L441-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L375(lines 375 413) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L309(lines 309 413) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L276(lines 276 413) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L574(line 574) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L541(line 541) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L508(line 508) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L475(line 475) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L442(line 442) no Hoare annotation was computed. [2020-07-20 11:35:42,045 INFO L268 CegarLoopResult]: For program point L409(lines 409 413) no Hoare annotation was computed. [2020-07-20 11:35:42,046 INFO L268 CegarLoopResult]: For program point L212(lines 212 413) no Hoare annotation was computed. [2020-07-20 11:35:42,046 INFO L268 CegarLoopResult]: For program point L179(lines 179 413) no Hoare annotation was computed. [2020-07-20 11:35:42,046 INFO L268 CegarLoopResult]: For program point L113(lines 113 413) no Hoare annotation was computed. [2020-07-20 11:35:42,046 INFO L268 CegarLoopResult]: For program point L47(lines 47 413) no Hoare annotation was computed. [2020-07-20 11:35:42,046 INFO L268 CegarLoopResult]: For program point L576-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,046 INFO L268 CegarLoopResult]: For program point L543-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,046 INFO L268 CegarLoopResult]: For program point L510-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,047 INFO L268 CegarLoopResult]: For program point L477-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,047 INFO L268 CegarLoopResult]: For program point L444-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,047 INFO L268 CegarLoopResult]: For program point L378(lines 378 413) no Hoare annotation was computed. [2020-07-20 11:35:42,047 INFO L268 CegarLoopResult]: For program point L577(line 577) no Hoare annotation was computed. [2020-07-20 11:35:42,047 INFO L268 CegarLoopResult]: For program point L544(line 544) no Hoare annotation was computed. [2020-07-20 11:35:42,047 INFO L268 CegarLoopResult]: For program point L511(line 511) no Hoare annotation was computed. [2020-07-20 11:35:42,047 INFO L268 CegarLoopResult]: For program point L478(line 478) no Hoare annotation was computed. [2020-07-20 11:35:42,047 INFO L268 CegarLoopResult]: For program point L445(line 445) no Hoare annotation was computed. [2020-07-20 11:35:42,048 INFO L268 CegarLoopResult]: For program point L280(lines 280 413) no Hoare annotation was computed. [2020-07-20 11:35:42,048 INFO L268 CegarLoopResult]: For program point L148(lines 148 413) no Hoare annotation was computed. [2020-07-20 11:35:42,048 INFO L268 CegarLoopResult]: For program point L82(lines 82 413) no Hoare annotation was computed. [2020-07-20 11:35:42,048 INFO L268 CegarLoopResult]: For program point L380(lines 380 413) no Hoare annotation was computed. [2020-07-20 11:35:42,048 INFO L268 CegarLoopResult]: For program point L314(lines 314 413) no Hoare annotation was computed. [2020-07-20 11:35:42,048 INFO L268 CegarLoopResult]: For program point L248(lines 248 413) no Hoare annotation was computed. [2020-07-20 11:35:42,048 INFO L268 CegarLoopResult]: For program point L215(lines 215 413) no Hoare annotation was computed. [2020-07-20 11:35:42,048 INFO L268 CegarLoopResult]: For program point L83(lines 83 89) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L50(lines 50 413) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L83-2(lines 83 89) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L579-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L546-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L513-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L480-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L414(lines 414 416) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L447-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L381(lines 381 387) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L414-2(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L315(lines 315 326) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L381-2(lines 381 387) no Hoare annotation was computed. [2020-07-20 11:35:42,049 INFO L268 CegarLoopResult]: For program point L315-2(lines 315 326) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point calculate_outputFINAL(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point calculate_outputEXIT(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point L580(line 580) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point L547(line 547) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point L514(line 514) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point L481(line 481) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point L448(line 448) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point L415(line 415) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point L349(lines 349 413) no Hoare annotation was computed. [2020-07-20 11:35:42,050 INFO L268 CegarLoopResult]: For program point L283(lines 283 413) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L218(lines 218 413) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L185(lines 185 413) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L119(lines 119 413) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L582-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L549-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L516-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L483-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L450-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L417-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,051 INFO L268 CegarLoopResult]: For program point L54(lines 54 413) no Hoare annotation was computed. [2020-07-20 11:35:42,052 INFO L268 CegarLoopResult]: For program point L583(line 583) no Hoare annotation was computed. [2020-07-20 11:35:42,052 INFO L268 CegarLoopResult]: For program point L550(line 550) no Hoare annotation was computed. [2020-07-20 11:35:42,052 INFO L268 CegarLoopResult]: For program point L517(line 517) no Hoare annotation was computed. [2020-07-20 11:35:42,052 INFO L268 CegarLoopResult]: For program point L484(line 484) no Hoare annotation was computed. [2020-07-20 11:35:42,052 INFO L268 CegarLoopResult]: For program point L451(line 451) no Hoare annotation was computed. [2020-07-20 11:35:42,052 INFO L268 CegarLoopResult]: For program point L418(line 418) no Hoare annotation was computed. [2020-07-20 11:35:42,052 INFO L268 CegarLoopResult]: For program point L286(lines 286 413) no Hoare annotation was computed. [2020-07-20 11:35:42,052 INFO L268 CegarLoopResult]: For program point L253(lines 253 413) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L187(lines 187 413) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L154(lines 154 413) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L585-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L552-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L519-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L486-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L453-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L420-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,053 INFO L268 CegarLoopResult]: For program point L354(lines 354 413) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L189(lines 189 413) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L123(lines 123 413) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L586(line 586) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L553(line 553) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L520(line 520) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L487(line 487) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L454(line 454) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L421(line 421) no Hoare annotation was computed. [2020-07-20 11:35:42,054 INFO L268 CegarLoopResult]: For program point L223(lines 223 413) no Hoare annotation was computed. [2020-07-20 11:35:42,055 INFO L268 CegarLoopResult]: For program point L91(lines 91 413) no Hoare annotation was computed. [2020-07-20 11:35:42,055 INFO L268 CegarLoopResult]: For program point L389(lines 389 413) no Hoare annotation was computed. [2020-07-20 11:35:42,055 INFO L268 CegarLoopResult]: For program point L191(lines 191 413) no Hoare annotation was computed. [2020-07-20 11:35:42,055 INFO L268 CegarLoopResult]: For program point L59(lines 59 413) no Hoare annotation was computed. [2020-07-20 11:35:42,055 INFO L268 CegarLoopResult]: For program point L588-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,055 INFO L268 CegarLoopResult]: For program point L555-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,055 INFO L268 CegarLoopResult]: For program point L522-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,056 INFO L264 CegarLoopResult]: At program point calculate_outputENTRY(lines 29 598) the Hoare annotation is: (let ((.cse2 (<= ~a28~0 |old(~a28~0)|)) (.cse1 (<= ~a17~0 |old(~a17~0)|)) (.cse3 (<= |old(~a28~0)| ~a28~0)) (.cse4 (not (<= |old(~a28~0)| 10))) (.cse5 (not (<= |old(~a25~0)| 0))) (.cse0 (not (<= |old(~a17~0)| 8)))) (and (or (not (<= |old(~a28~0)| 9)) .cse0 (and .cse1 .cse2 .cse3)) (or (not (<= 8 |old(~a17~0)|)) .cse0 (and .cse2 (<= ~a17~0 8) (<= 8 ~a17~0) .cse3)) (or .cse4 .cse5 (and .cse1 (<= ~a28~0 10) .cse3) .cse0) (or .cse4 .cse5 (<= ~a25~0 0) .cse0))) [2020-07-20 11:35:42,056 INFO L268 CegarLoopResult]: For program point L489-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,056 INFO L268 CegarLoopResult]: For program point L456-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,056 INFO L268 CegarLoopResult]: For program point L423-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,056 INFO L268 CegarLoopResult]: For program point L291(lines 291 413) no Hoare annotation was computed. [2020-07-20 11:35:42,056 INFO L268 CegarLoopResult]: For program point L225(lines 225 413) no Hoare annotation was computed. [2020-07-20 11:35:42,056 INFO L268 CegarLoopResult]: For program point L159(lines 159 413) no Hoare annotation was computed. [2020-07-20 11:35:42,056 INFO L268 CegarLoopResult]: For program point L589(line 589) no Hoare annotation was computed. [2020-07-20 11:35:42,056 INFO L268 CegarLoopResult]: For program point L556(line 556) no Hoare annotation was computed. [2020-07-20 11:35:42,057 INFO L268 CegarLoopResult]: For program point L523(line 523) no Hoare annotation was computed. [2020-07-20 11:35:42,057 INFO L268 CegarLoopResult]: For program point L490(line 490) no Hoare annotation was computed. [2020-07-20 11:35:42,057 INFO L268 CegarLoopResult]: For program point L457(line 457) no Hoare annotation was computed. [2020-07-20 11:35:42,057 INFO L268 CegarLoopResult]: For program point L424(line 424) no Hoare annotation was computed. [2020-07-20 11:35:42,057 INFO L268 CegarLoopResult]: For program point L259(lines 259 413) no Hoare annotation was computed. [2020-07-20 11:35:42,057 INFO L268 CegarLoopResult]: For program point L293(lines 293 413) no Hoare annotation was computed. [2020-07-20 11:35:42,057 INFO L268 CegarLoopResult]: For program point L194(lines 194 413) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L95(lines 95 413) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L591-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L558-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L525-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L492-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L459-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L426-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L261(lines 261 413) no Hoare annotation was computed. [2020-07-20 11:35:42,058 INFO L268 CegarLoopResult]: For program point L30(lines 30 413) no Hoare annotation was computed. [2020-07-20 11:35:42,059 INFO L268 CegarLoopResult]: For program point L592(line 592) no Hoare annotation was computed. [2020-07-20 11:35:42,059 INFO L268 CegarLoopResult]: For program point L559(line 559) no Hoare annotation was computed. [2020-07-20 11:35:42,059 INFO L268 CegarLoopResult]: For program point L526(line 526) no Hoare annotation was computed. [2020-07-20 11:35:42,059 INFO L268 CegarLoopResult]: For program point L493(line 493) no Hoare annotation was computed. [2020-07-20 11:35:42,059 INFO L268 CegarLoopResult]: For program point L460(line 460) no Hoare annotation was computed. [2020-07-20 11:35:42,059 INFO L268 CegarLoopResult]: For program point L427(line 427) no Hoare annotation was computed. [2020-07-20 11:35:42,059 INFO L268 CegarLoopResult]: For program point L394(lines 394 413) no Hoare annotation was computed. [2020-07-20 11:35:42,059 INFO L268 CegarLoopResult]: For program point L361(lines 361 413) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L328(lines 328 413) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L262(lines 262 274) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L262-2(lines 262 274) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L130(lines 130 413) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L65(lines 65 413) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L594-1(lines 594 596) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L561-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L528-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,060 INFO L268 CegarLoopResult]: For program point L495-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,061 INFO L268 CegarLoopResult]: For program point L462-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,061 INFO L268 CegarLoopResult]: For program point L429-1(lines 29 598) no Hoare annotation was computed. [2020-07-20 11:35:42,061 INFO L268 CegarLoopResult]: For program point L297(lines 297 413) no Hoare annotation was computed. [2020-07-20 11:35:42,061 INFO L268 CegarLoopResult]: For program point L198(lines 198 413) no Hoare annotation was computed. [2020-07-20 11:35:42,061 INFO L268 CegarLoopResult]: For program point L165(lines 165 413) no Hoare annotation was computed. [2020-07-20 11:35:42,061 INFO L268 CegarLoopResult]: For program point L99(lines 99 413) no Hoare annotation was computed. [2020-07-20 11:35:42,061 INFO L268 CegarLoopResult]: For program point L595(line 595) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L562(line 562) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L529(line 529) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L496(line 496) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L463(line 463) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L430(line 430) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L331(lines 331 413) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L298(lines 298 307) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L232(lines 232 413) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L298-2(lines 298 307) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L398(lines 398 413) no Hoare annotation was computed. [2020-07-20 11:35:42,062 INFO L268 CegarLoopResult]: For program point L332(lines 332 335) no Hoare annotation was computed. [2020-07-20 11:35:42,063 INFO L268 CegarLoopResult]: For program point L332-2(lines 332 335) no Hoare annotation was computed. [2020-07-20 11:35:42,063 INFO L268 CegarLoopResult]: For program point L134(lines 134 413) no Hoare annotation was computed. [2020-07-20 11:35:42,063 INFO L268 CegarLoopResult]: For program point L35(lines 35 413) no Hoare annotation was computed. [2020-07-20 11:35:42,063 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:35:42,063 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~a17~0 8) (<= 8 ~a17~0) (<= ~a25~0 0) (<= ~a28~0 7)) [2020-07-20 11:35:42,063 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:35:42,063 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:35:42,063 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 600 617) the Hoare annotation is: (or (not (<= |old(~a28~0)| 7)) (and (<= ~a28~0 |old(~a28~0)|) (<= ~a17~0 8) (<= 8 ~a17~0) (<= ~a25~0 0) (<= |old(~a28~0)| ~a28~0)) (not (<= 8 |old(~a17~0)|)) (not (<= |old(~a25~0)| 0)) (not (<= |old(~a17~0)| 8))) [2020-07-20 11:35:42,063 INFO L264 CegarLoopResult]: At program point L606-2(lines 606 616) the Hoare annotation is: (let ((.cse0 (<= ~a17~0 8))) (or (and .cse0 (<= ~a28~0 9)) (not (<= |old(~a28~0)| 7)) (and .cse0 (<= ~a28~0 10) (<= ~a25~0 0)) (not (<= 8 |old(~a17~0)|)) (not (<= |old(~a25~0)| 0)) (not (<= |old(~a17~0)| 8)) (and .cse0 (<= 8 ~a17~0)))) [2020-07-20 11:35:42,063 INFO L268 CegarLoopResult]: For program point L606-3(lines 600 617) no Hoare annotation was computed. [2020-07-20 11:35:42,064 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 600 617) no Hoare annotation was computed. [2020-07-20 11:35:42,064 INFO L264 CegarLoopResult]: At program point L614(line 614) the Hoare annotation is: (let ((.cse0 (<= ~a17~0 8))) (or (and .cse0 (<= ~a28~0 9)) (not (<= |old(~a28~0)| 7)) (and .cse0 (<= ~a28~0 10) (<= ~a25~0 0)) (not (<= 8 |old(~a17~0)|)) (not (<= |old(~a25~0)| 0)) (not (<= |old(~a17~0)| 8)) (and .cse0 (<= 8 ~a17~0)))) [2020-07-20 11:35:42,064 INFO L268 CegarLoopResult]: For program point L614-1(line 614) no Hoare annotation was computed. [2020-07-20 11:35:42,064 INFO L268 CegarLoopResult]: For program point L611(line 611) no Hoare annotation was computed. [2020-07-20 11:35:42,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:35:42 BoogieIcfgContainer [2020-07-20 11:35:42,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:35:42,085 INFO L168 Benchmark]: Toolchain (without parser) took 14080.37 ms. Allocated memory was 137.9 MB in the beginning and 382.2 MB in the end (delta: 244.3 MB). Free memory was 99.2 MB in the beginning and 327.4 MB in the end (delta: -228.2 MB). Peak memory consumption was 261.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:35:42,086 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:35:42,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 845.20 ms. Allocated memory was 137.9 MB in the beginning and 206.6 MB in the end (delta: 68.7 MB). Free memory was 98.7 MB in the beginning and 173.1 MB in the end (delta: -74.4 MB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:35:42,087 INFO L168 Benchmark]: Boogie Preprocessor took 114.49 ms. Allocated memory is still 206.6 MB. Free memory was 173.1 MB in the beginning and 168.0 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:35:42,088 INFO L168 Benchmark]: RCFGBuilder took 1236.31 ms. Allocated memory was 206.6 MB in the beginning and 235.4 MB in the end (delta: 28.8 MB). Free memory was 168.0 MB in the beginning and 182.9 MB in the end (delta: -14.8 MB). Peak memory consumption was 86.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:35:42,089 INFO L168 Benchmark]: TraceAbstraction took 11878.00 ms. Allocated memory was 235.4 MB in the beginning and 382.2 MB in the end (delta: 146.8 MB). Free memory was 182.9 MB in the beginning and 327.4 MB in the end (delta: -144.5 MB). Peak memory consumption was 247.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:35:42,096 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 845.20 ms. Allocated memory was 137.9 MB in the beginning and 206.6 MB in the end (delta: 68.7 MB). Free memory was 98.7 MB in the beginning and 173.1 MB in the end (delta: -74.4 MB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.49 ms. Allocated memory is still 206.6 MB. Free memory was 173.1 MB in the beginning and 168.0 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1236.31 ms. Allocated memory was 206.6 MB in the beginning and 235.4 MB in the end (delta: 28.8 MB). Free memory was 168.0 MB in the beginning and 182.9 MB in the end (delta: -14.8 MB). Peak memory consumption was 86.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11878.00 ms. Allocated memory was 235.4 MB in the beginning and 382.2 MB in the end (delta: 146.8 MB). Free memory was 182.9 MB in the beginning and 327.4 MB in the end (delta: -144.5 MB). Peak memory consumption was 247.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 574]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 606]: Loop Invariant Derived loop invariant: ((((((a17 <= 8 && a28 <= 9) || !(\old(a28) <= 7)) || ((a17 <= 8 && a28 <= 10) && a25 <= 0)) || !(8 <= \old(a17))) || !(\old(a25) <= 0)) || !(\old(a17) <= 8)) || (a17 <= 8 && 8 <= a17) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 236 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.8s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 404 SDtfs, 2979 SDslu, 353 SDs, 0 SdLazy, 4985 SolverSat, 906 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1920 GetRequests, 1882 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1958occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 494 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 59 PreInvPairs, 87 NumberOfFragments, 220 HoareAnnotationTreeSize, 59 FomulaSimplifications, 2512 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 881 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1372 NumberOfCodeBlocks, 1372 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 1902 ConstructedInterpolants, 0 QuantifiedInterpolants, 598006 SizeOfPredicates, 11 NumberOfNonLiveVariables, 3257 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 420/432 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...