/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/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:08:37,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:08:37,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:08:37,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:08:37,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:08:37,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:08:37,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:08:37,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:08:37,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:08:37,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:08:37,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:08:37,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:08:37,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:08:37,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:08:37,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:08:37,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:08:37,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:08:37,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:08:37,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:08:37,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:08:37,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:08:37,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:08:37,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:08:37,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:08:37,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:08:37,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:08:37,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:08:37,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:08:37,590 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 [2020-07-21 12:08:37,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:08:37,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:08:37,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:08:37,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:08:37,631 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:08:37,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:08:37,631 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:08:37,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:08:37,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:08:37,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:08:37,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:08:37,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:08:37,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:08:37,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:08:37,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:08:37,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:08:37,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:08:37,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:08:37,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:08:37,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:08:37,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:08:37,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:08:37,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:08:37,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:08:37,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:08:37,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:08:37,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:08:37,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:08:37,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:08:37,636 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 [2020-07-21 12:08:37,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:08:37,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:08:37,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:08:37,966 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:08:37,969 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:08:37,971 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-07-21 12:08:38,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96f37e8a/d27ce8e0ab524a95b9f29b6b9d1982af/FLAGfc3aeab56 [2020-07-21 12:08:38,507 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:08:38,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-07-21 12:08:38,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96f37e8a/d27ce8e0ab524a95b9f29b6b9d1982af/FLAGfc3aeab56 [2020-07-21 12:08:38,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d96f37e8a/d27ce8e0ab524a95b9f29b6b9d1982af [2020-07-21 12:08:38,869 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:08:38,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:08:38,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:08:38,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:08:38,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:08:38,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:08:38" (1/1) ... [2020-07-21 12:08:38,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e90495e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:38, skipping insertion in model container [2020-07-21 12:08:38,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:08:38" (1/1) ... [2020-07-21 12:08:38,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:08:38,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:08:39,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:08:39,111 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:08:39,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:08:39,149 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:08:39,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39 WrapperNode [2020-07-21 12:08:39,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:08:39,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:08:39,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:08:39,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:08:39,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (1/1) ... [2020-07-21 12:08:39,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (1/1) ... [2020-07-21 12:08:39,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (1/1) ... [2020-07-21 12:08:39,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (1/1) ... [2020-07-21 12:08:39,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (1/1) ... [2020-07-21 12:08:39,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (1/1) ... [2020-07-21 12:08:39,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (1/1) ... [2020-07-21 12:08:39,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:08:39,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:08:39,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:08:39,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:08:39,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (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 [2020-07-21 12:08:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:08:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:08:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:08:39,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:08:39,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:08:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:08:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:08:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:08:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:08:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:08:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:08:39,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:08:39,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:08:39,610 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:08:39,610 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 12:08:39,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:08:39 BoogieIcfgContainer [2020-07-21 12:08:39,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:08:39,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:08:39,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:08:39,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:08:39,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:08:38" (1/3) ... [2020-07-21 12:08:39,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cce87d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:08:39, skipping insertion in model container [2020-07-21 12:08:39,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:39" (2/3) ... [2020-07-21 12:08:39,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cce87d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:08:39, skipping insertion in model container [2020-07-21 12:08:39,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:08:39" (3/3) ... [2020-07-21 12:08:39,625 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-07-21 12:08:39,636 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:08:39,644 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:08:39,677 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:08:39,723 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:08:39,724 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:08:39,724 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:08:39,724 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:08:39,724 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:08:39,724 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:08:39,724 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:08:39,725 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:08:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 12:08:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 12:08:39,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:08:39,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:08:39,749 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:08:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:08:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash -684006215, now seen corresponding path program 1 times [2020-07-21 12:08:39,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:08:39,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776962809] [2020-07-21 12:08:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 12:08:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:08:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 12:08:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:08:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:08:40,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:08:40,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776962809] [2020-07-21 12:08:40,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:08:40,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:08:40,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729000380] [2020-07-21 12:08:40,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:08:40,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:08:40,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:08:40,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:08:40,090 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-21 12:08:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:08:40,401 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2020-07-21 12:08:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:08:40,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-21 12:08:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:08:40,413 INFO L225 Difference]: With dead ends: 74 [2020-07-21 12:08:40,414 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 12:08:40,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:08:40,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 12:08:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 12:08:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 12:08:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-21 12:08:40,464 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 14 [2020-07-21 12:08:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:08:40,464 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-21 12:08:40,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:08:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-21 12:08:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 12:08:40,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:08:40,467 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 12:08:40,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:08:40,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:08:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:08:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1563298987, now seen corresponding path program 1 times [2020-07-21 12:08:40,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:08:40,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246370794] [2020-07-21 12:08:40,684 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 [2020-07-21 12:08:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:08:40,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 12:08:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:08:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:08:40,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:08:40,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:08:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:08:41,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246370794] [2020-07-21 12:08:41,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:08:41,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-21 12:08:41,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152071252] [2020-07-21 12:08:41,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:08:41,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:08:41,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:08:41,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:08:41,181 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 6 states. [2020-07-21 12:09:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:06,142 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-07-21 12:09:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:09:06,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-07-21 12:09:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:06,145 INFO L225 Difference]: With dead ends: 58 [2020-07-21 12:09:06,145 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 12:09:06,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:09:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 12:09:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-21 12:09:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 12:09:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-21 12:09:06,156 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 29 [2020-07-21 12:09:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:06,157 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-21 12:09:06,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:09:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-21 12:09:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 12:09:06,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:06,159 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:09:06,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:06,373 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:06,374 INFO L82 PathProgramCache]: Analyzing trace with hash -908789750, now seen corresponding path program 1 times [2020-07-21 12:09:06,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:06,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336704985] [2020-07-21 12:09:06,377 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 [2020-07-21 12:09:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:09:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:09:06,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:09:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:09:06,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336704985] [2020-07-21 12:09:06,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:09:06,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 12:09:06,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409393452] [2020-07-21 12:09:06,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:09:06,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:09:06,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:09:06,530 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 8 states. [2020-07-21 12:09:13,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:13,234 INFO L93 Difference]: Finished difference Result 157 states and 237 transitions. [2020-07-21 12:09:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:09:13,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-21 12:09:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:13,238 INFO L225 Difference]: With dead ends: 157 [2020-07-21 12:09:13,238 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 12:09:13,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:09:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 12:09:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2020-07-21 12:09:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-21 12:09:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-07-21 12:09:13,267 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 38 [2020-07-21 12:09:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:13,267 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-07-21 12:09:13,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:09:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-07-21 12:09:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 12:09:13,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:13,270 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:09:13,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:13,485 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1051834481, now seen corresponding path program 1 times [2020-07-21 12:09:13,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:13,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082784355] [2020-07-21 12:09:13,488 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 [2020-07-21 12:09:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:13,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 12:09:13,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 12:09:13,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:09:13,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:09:19,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:09:32,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:09:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 2 refuted. 27 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 12:09:46,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082784355] [2020-07-21 12:09:46,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:09:46,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-07-21 12:09:46,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334055328] [2020-07-21 12:09:46,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 12:09:46,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 12:09:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=55, Unknown=16, NotChecked=0, Total=110 [2020-07-21 12:09:46,898 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 11 states. [2020-07-21 12:09:49,136 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 9) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (= 0 (mod (mod (mod .cse1 4294967296) 9) 4294967296))))) is different from false [2020-07-21 12:09:51,200 WARN L838 $PredicateComparison]: unable to prove that (and (or (= 0 (mod (mod (mod c_main_~l~0 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296))) (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 9) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (= 0 (mod (mod (mod .cse1 4294967296) 9) 4294967296))))) is different from false [2020-07-21 12:09:53,281 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ c_main_~l~0 2))) (or (< 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 9) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296)) (= 0 (mod (mod (mod .cse1 4294967296) 9) 4294967296))))) is different from false [2020-07-21 12:11:55,133 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (let ((.cse0 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 9) 4294967296))))) is different from false [2020-07-21 12:11:57,152 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (let ((.cse0 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 9) 4294967296))))) is different from true [2020-07-21 12:13:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:47,531 INFO L93 Difference]: Finished difference Result 201 states and 294 transitions. [2020-07-21 12:13:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 12:13:47,666 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-07-21 12:13:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:47,668 INFO L225 Difference]: With dead ends: 201 [2020-07-21 12:13:47,668 INFO L226 Difference]: Without dead ends: 126 [2020-07-21 12:13:47,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=47, Invalid=58, Unknown=21, NotChecked=84, Total=210 [2020-07-21 12:13:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-21 12:13:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-07-21 12:13:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 12:13:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 162 transitions. [2020-07-21 12:13:47,688 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 162 transitions. Word has length 54 [2020-07-21 12:13:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:47,689 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 162 transitions. [2020-07-21 12:13:47,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 12:13:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 162 transitions. [2020-07-21 12:13:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 12:13:47,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:47,691 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:47,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:47,896 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:47,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1542200507, now seen corresponding path program 1 times [2020-07-21 12:13:47,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:47,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253488659] [2020-07-21 12:13:47,898 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 [2020-07-21 12:13:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 12:13:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 12:13:48,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:48,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:14:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 0 refuted. 43 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 12:14:43,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253488659] [2020-07-21 12:14:43,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:14:43,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 12:14:43,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972653763] [2020-07-21 12:14:43,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:14:43,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:14:44,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:14:44,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=345, Unknown=25, NotChecked=0, Total=462 [2020-07-21 12:14:44,000 INFO L87 Difference]: Start difference. First operand 121 states and 162 transitions. Second operand 22 states. [2020-07-21 12:15:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:15:57,042 INFO L93 Difference]: Finished difference Result 195 states and 279 transitions. [2020-07-21 12:15:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 12:15:57,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-07-21 12:15:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:15:57,044 INFO L225 Difference]: With dead ends: 195 [2020-07-21 12:15:57,044 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 12:15:57,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=96, Invalid=385, Unknown=25, NotChecked=0, Total=506 [2020-07-21 12:15:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 12:15:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-07-21 12:15:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-21 12:15:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 176 transitions. [2020-07-21 12:15:57,062 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 176 transitions. Word has length 58 [2020-07-21 12:15:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:15:57,063 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 176 transitions. [2020-07-21 12:15:57,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:15:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 176 transitions. [2020-07-21 12:15:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 12:15:57,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:15:57,065 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:15:57,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:15:57,268 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:15:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:15:57,269 INFO L82 PathProgramCache]: Analyzing trace with hash 852033749, now seen corresponding path program 1 times [2020-07-21 12:15:57,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:15:57,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609643428] [2020-07-21 12:15:57,270 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 [2020-07-21 12:15:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:15:57,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 12:15:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:15:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 12:15:57,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:15:57,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:16:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 50 proven. 0 refuted. 65 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-21 12:16:50,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609643428] [2020-07-21 12:16:50,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:16:50,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 26 [2020-07-21 12:16:50,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238662364] [2020-07-21 12:16:50,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 12:16:50,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:50,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 12:16:50,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=510, Unknown=22, NotChecked=0, Total=650 [2020-07-21 12:16:50,137 INFO L87 Difference]: Start difference. First operand 132 states and 176 transitions. Second operand 26 states. [2020-07-21 12:18:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:28,910 INFO L93 Difference]: Finished difference Result 229 states and 324 transitions. [2020-07-21 12:18:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 12:18:28,911 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2020-07-21 12:18:28,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:28,913 INFO L225 Difference]: With dead ends: 229 [2020-07-21 12:18:28,913 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 12:18:28,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 63.6s TimeCoverageRelationStatistics Valid=122, Invalid=558, Unknown=22, NotChecked=0, Total=702 [2020-07-21 12:18:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 12:18:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2020-07-21 12:18:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-07-21 12:18:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 196 transitions. [2020-07-21 12:18:28,937 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 196 transitions. Word has length 83 [2020-07-21 12:18:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:28,938 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 196 transitions. [2020-07-21 12:18:28,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 12:18:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 196 transitions. [2020-07-21 12:18:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-21 12:18:28,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:28,940 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:18:29,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:29,145 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash 406834607, now seen corresponding path program 1 times [2020-07-21 12:18:29,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:29,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449254462] [2020-07-21 12:18:29,147 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 [2020-07-21 12:18:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:29,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-21 12:18:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 12:18:29,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:18:29,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:18:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 18 proven. 0 refuted. 107 times theorem prover too weak. 162 trivial. 0 not checked. [2020-07-21 12:18:54,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449254462] [2020-07-21 12:18:54,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:18:54,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 26 [2020-07-21 12:18:54,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614997209] [2020-07-21 12:18:54,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 12:18:54,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 12:18:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=550, Unknown=7, NotChecked=0, Total=650 [2020-07-21 12:18:54,899 INFO L87 Difference]: Start difference. First operand 151 states and 196 transitions. Second operand 26 states. [2020-07-21 12:19:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:46,724 INFO L93 Difference]: Finished difference Result 242 states and 336 transitions. [2020-07-21 12:19:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 12:19:46,724 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-07-21 12:19:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:46,728 INFO L225 Difference]: With dead ends: 242 [2020-07-21 12:19:46,728 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 12:19:46,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 169 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=97, Invalid=598, Unknown=7, NotChecked=0, Total=702 [2020-07-21 12:19:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 12:19:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-07-21 12:19:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-21 12:19:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2020-07-21 12:19:46,741 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 104 [2020-07-21 12:19:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:46,742 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2020-07-21 12:19:46,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 12:19:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2020-07-21 12:19:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-21 12:19:46,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:46,745 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 8, 7, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:19:46,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:46,960 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash 853812107, now seen corresponding path program 1 times [2020-07-21 12:19:46,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:46,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685778258] [2020-07-21 12:19:46,963 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 [2020-07-21 12:19:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:19:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-21 12:19:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:19:47,441 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 12:19:47,442 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 12:19:47,443 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 12:19:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 163 proven. 246 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 12:19:47,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:19:47,629 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:19:47,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:19:47,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685778258] [2020-07-21 12:19:47,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:19:47,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-21 12:19:47,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181004257] [2020-07-21 12:19:47,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 12:19:47,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:19:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 12:19:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:19:47,710 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand 15 states. [2020-07-21 12:19:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:48,283 INFO L93 Difference]: Finished difference Result 245 states and 335 transitions. [2020-07-21 12:19:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 12:19:48,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2020-07-21 12:19:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:48,286 INFO L225 Difference]: With dead ends: 245 [2020-07-21 12:19:48,287 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 12:19:48,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-07-21 12:19:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 12:19:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-07-21 12:19:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-21 12:19:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 217 transitions. [2020-07-21 12:19:48,298 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 217 transitions. Word has length 133 [2020-07-21 12:19:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:48,299 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 217 transitions. [2020-07-21 12:19:48,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 12:19:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 217 transitions. [2020-07-21 12:19:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-21 12:19:48,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:48,302 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 9, 7, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:19:48,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:48,504 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -969344547, now seen corresponding path program 2 times [2020-07-21 12:19:48,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:48,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497719457] [2020-07-21 12:19:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:19:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 71 conjunts are in the unsatisfiable core [2020-07-21 12:19:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:19:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 22 proven. 356 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-21 12:19:49,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:19:49,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:19:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 62 proven. 0 refuted. 12 times theorem prover too weak. 524 trivial. 0 not checked. [2020-07-21 12:19:59,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497719457] [2020-07-21 12:19:59,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:19:59,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8] total 33 [2020-07-21 12:19:59,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815072573] [2020-07-21 12:19:59,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 12:19:59,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:19:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 12:19:59,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=939, Unknown=3, NotChecked=0, Total=1056 [2020-07-21 12:19:59,299 INFO L87 Difference]: Start difference. First operand 170 states and 217 transitions. Second operand 33 states. [2020-07-21 12:20:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:09,804 INFO L93 Difference]: Finished difference Result 250 states and 345 transitions. [2020-07-21 12:20:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 12:20:09,926 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 138 [2020-07-21 12:20:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:09,927 INFO L225 Difference]: With dead ends: 250 [2020-07-21 12:20:09,927 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:20:09,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 221 SyntacticMatches, 24 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=118, Invalid=1001, Unknown=3, NotChecked=0, Total=1122 [2020-07-21 12:20:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:20:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:20:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:20:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:20:09,930 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2020-07-21 12:20:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:09,931 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:20:09,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 12:20:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:20:09,931 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:20:10,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:10,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:20:10,316 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 144 [2020-07-21 12:20:10,530 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 18 [2020-07-21 12:20:10,643 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 18 [2020-07-21 12:20:10,652 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:20:10,653 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:20:10,653 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:20:10,653 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:20:10,653 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:20:10,653 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:20:10,653 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:20:10,654 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 12:20:10,654 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 12:20:10,654 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 12:20:10,654 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 12:20:10,654 INFO L268 CegarLoopResult]: For program point L35-2(lines 21 38) no Hoare annotation was computed. [2020-07-21 12:20:10,654 INFO L268 CegarLoopResult]: For program point L31(lines 31 38) no Hoare annotation was computed. [2020-07-21 12:20:10,655 INFO L268 CegarLoopResult]: For program point L27(lines 27 38) no Hoare annotation was computed. [2020-07-21 12:20:10,655 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 43) no Hoare annotation was computed. [2020-07-21 12:20:10,655 INFO L268 CegarLoopResult]: For program point L23(lines 23 38) no Hoare annotation was computed. [2020-07-21 12:20:10,655 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 41) no Hoare annotation was computed. [2020-07-21 12:20:10,655 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (= (mod (+ main_~i~0 main_~j~0 main_~k~0 main_~v1~0 main_~v2~0 main_~v3~0 main_~v4~0 main_~v5~0 main_~v6~0 1) 4294967296) (mod (+ main_~l~0 1) 4294967296)) [2020-07-21 12:20:10,655 INFO L264 CegarLoopResult]: At program point L40-1(lines 19 41) the Hoare annotation is: (= (mod (+ main_~i~0 main_~j~0 main_~k~0 main_~v1~0 main_~v2~0 main_~v3~0 main_~v4~0 main_~v5~0 main_~v6~0 1) 4294967296) (mod (+ main_~l~0 1) 4294967296)) [2020-07-21 12:20:10,655 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 12:20:10,655 INFO L268 CegarLoopResult]: For program point L29(lines 29 38) no Hoare annotation was computed. [2020-07-21 12:20:10,655 INFO L268 CegarLoopResult]: For program point L25(lines 25 38) no Hoare annotation was computed. [2020-07-21 12:20:10,655 INFO L268 CegarLoopResult]: For program point L21(lines 21 38) no Hoare annotation was computed. [2020-07-21 12:20:10,656 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 43) no Hoare annotation was computed. [2020-07-21 12:20:10,656 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 43) the Hoare annotation is: true [2020-07-21 12:20:10,656 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-21 12:20:10,656 INFO L268 CegarLoopResult]: For program point L35(lines 35 38) no Hoare annotation was computed. [2020-07-21 12:20:10,656 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 12:20:10,656 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 12:20:10,656 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 12:20:10,656 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 12:20:10,657 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 12:20:10,657 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 12:20:10,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:20:10 BoogieIcfgContainer [2020-07-21 12:20:10,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:20:10,672 INFO L168 Benchmark]: Toolchain (without parser) took 691801.81 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 106.0 MB in the beginning and 125.9 MB in the end (delta: -20.0 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2020-07-21 12:20:10,673 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 12:20:10,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.38 ms. Allocated memory is still 147.8 MB. Free memory was 105.5 MB in the beginning and 95.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 12:20:10,674 INFO L168 Benchmark]: Boogie Preprocessor took 119.54 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 95.4 MB in the beginning and 183.2 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:20:10,675 INFO L168 Benchmark]: RCFGBuilder took 344.62 ms. Allocated memory is still 205.0 MB. Free memory was 182.6 MB in the beginning and 166.0 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:20:10,676 INFO L168 Benchmark]: TraceAbstraction took 691053.80 ms. Allocated memory was 205.0 MB in the beginning and 203.9 MB in the end (delta: -1.0 MB). Free memory was 166.0 MB in the beginning and 125.9 MB in the end (delta: 40.1 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:20:10,680 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.38 ms. Allocated memory is still 147.8 MB. Free memory was 105.5 MB in the beginning and 95.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.54 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 95.4 MB in the beginning and 183.2 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.62 ms. Allocated memory is still 205.0 MB. Free memory was 182.6 MB in the beginning and 166.0 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 691053.80 ms. Allocated memory was 205.0 MB in the beginning and 203.9 MB in the end (delta: -1.0 MB). Free memory was 166.0 MB in the beginning and 125.9 MB in the end (delta: 40.1 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: (i + j + k + v1 + v2 + v3 + v4 + v5 + v6 + 1) % 4294967296 == (l + 1) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 690.4s, OverallIterations: 9, TraceHistogramMax: 12, AutomataDifference: 507.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 227 SDtfs, 345 SDslu, 1886 SDs, 0 SdLazy, 5757 SolverSat, 173 SolverUnsat, 221 SolverUnknown, 0 SolverNotchecked, 453.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1192 GetRequests, 973 SyntacticMatches, 60 SemanticMatches, 159 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 210.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 74 PreInvPairs, 111 NumberOfFragments, 43 HoareAnnotationTreeSize, 74 FomulaSimplifications, 504 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 1160 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 179.9s InterpolantComputationTime, 651 NumberOfCodeBlocks, 651 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 1139 ConstructedInterpolants, 0 QuantifiedInterpolants, 1591031 SizeOfPredicates, 25 NumberOfNonLiveVariables, 1348 ConjunctsInSsa, 329 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 1655/2906 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...