/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:58:35,502 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:58:35,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:58:35,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:58:35,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:58:35,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:58:35,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:58:35,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:58:35,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:58:35,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:58:35,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:58:35,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:58:35,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:58:35,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:58:35,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:58:35,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:58:35,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:58:35,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:58:35,558 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 21:58:35,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:58:35,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:58:35,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:58:35,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:58:35,580 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:58:35,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:58:35,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:58:35,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:58:35,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:58:35,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:58:35,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:58:35,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:58:35,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:58:35,582 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:58:35,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:58:35,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:58:35,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:58:35,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:58:35,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:58:35,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:58:35,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:58:35,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:58:35,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:58:35,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:58:35,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:58:35,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:58:35,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:35,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:58:35,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:58:35,587 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:58:35,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:58:35,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:58:35,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:58:35,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:58:35,900 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:58:35,901 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label05.c [2020-07-20 21:58:35,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/900ac91d0/6967fc6f07d9465798ba1758075d4917/FLAG19fec6a52 [2020-07-20 21:58:36,661 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:58:36,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label05.c [2020-07-20 21:58:36,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/900ac91d0/6967fc6f07d9465798ba1758075d4917/FLAG19fec6a52 [2020-07-20 21:58:36,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/900ac91d0/6967fc6f07d9465798ba1758075d4917 [2020-07-20 21:58:36,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:58:36,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:58:36,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:58:36,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:58:36,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:58:36,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:58:36" (1/1) ... [2020-07-20 21:58:36,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a01cd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:36, skipping insertion in model container [2020-07-20 21:58:36,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:58:36" (1/1) ... [2020-07-20 21:58:36,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:58:36,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:58:37,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:58:37,717 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:58:37,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:58:37,824 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:58:37,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37 WrapperNode [2020-07-20 21:58:37,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:58:37,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:58:37,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:58:37,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:58:37,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (1/1) ... [2020-07-20 21:58:37,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (1/1) ... [2020-07-20 21:58:37,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (1/1) ... [2020-07-20 21:58:37,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (1/1) ... [2020-07-20 21:58:37,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (1/1) ... [2020-07-20 21:58:37,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (1/1) ... [2020-07-20 21:58:37,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (1/1) ... [2020-07-20 21:58:37,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:58:37,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:58:37,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:58:37,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:58:37,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (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 21:58:38,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:58:38,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:58:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-20 21:58:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:58:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-20 21:58:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:58:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:58:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 21:58:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:58:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:58:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:58:39,405 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:58:39,405 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 21:58:39,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:58:39 BoogieIcfgContainer [2020-07-20 21:58:39,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:58:39,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:58:39,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:58:39,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:58:39,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:58:36" (1/3) ... [2020-07-20 21:58:39,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d66140e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:58:39, skipping insertion in model container [2020-07-20 21:58:39,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:58:37" (2/3) ... [2020-07-20 21:58:39,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d66140e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:58:39, skipping insertion in model container [2020-07-20 21:58:39,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:58:39" (3/3) ... [2020-07-20 21:58:39,421 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label05.c [2020-07-20 21:58:39,433 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:58:39,443 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:58:39,459 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:58:39,491 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:58:39,491 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:58:39,492 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:58:39,492 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:58:39,492 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:58:39,492 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:58:39,492 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:58:39,492 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:58:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2020-07-20 21:58:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 21:58:39,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:39,537 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] [2020-07-20 21:58:39,538 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1904695938, now seen corresponding path program 1 times [2020-07-20 21:58:39,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:39,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760669770] [2020-07-20 21:58:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:58:39,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:58:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:39,862 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 21:58:39,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:58:39,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760669770] [2020-07-20 21:58:39,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:58:39,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:58:39,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102524347] [2020-07-20 21:58:39,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:58:39,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:39,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:58:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:58:39,893 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2020-07-20 21:58:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:40,869 INFO L93 Difference]: Finished difference Result 572 states and 963 transitions. [2020-07-20 21:58:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:58:40,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-07-20 21:58:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:40,889 INFO L225 Difference]: With dead ends: 572 [2020-07-20 21:58:40,890 INFO L226 Difference]: Without dead ends: 278 [2020-07-20 21:58:40,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 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 21:58:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-20 21:58:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2020-07-20 21:58:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-07-20 21:58:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2020-07-20 21:58:40,989 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 100 [2020-07-20 21:58:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:40,991 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2020-07-20 21:58:40,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:58:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2020-07-20 21:58:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-20 21:58:41,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:41,006 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 21:58:41,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:41,221 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1236531093, now seen corresponding path program 1 times [2020-07-20 21:58:41,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:41,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011255662] [2020-07-20 21:58:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:58:41,387 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:41,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:58:41,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:41,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:58:41,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011255662] [2020-07-20 21:58:41,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:58:41,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:58:41,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881069076] [2020-07-20 21:58:41,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:58:41,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:41,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:58:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:58:41,455 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 5 states. [2020-07-20 21:58:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:42,446 INFO L93 Difference]: Finished difference Result 842 states and 1218 transitions. [2020-07-20 21:58:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:58:42,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-07-20 21:58:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:42,457 INFO L225 Difference]: With dead ends: 842 [2020-07-20 21:58:42,458 INFO L226 Difference]: Without dead ends: 570 [2020-07-20 21:58:42,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:58:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-07-20 21:58:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2020-07-20 21:58:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-07-20 21:58:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2020-07-20 21:58:42,520 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 110 [2020-07-20 21:58:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:42,521 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2020-07-20 21:58:42,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:58:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2020-07-20 21:58:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-07-20 21:58:42,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:42,524 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 21:58:42,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:42,740 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash 235879383, now seen corresponding path program 1 times [2020-07-20 21:58:42,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:42,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520056106] [2020-07-20 21:58:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:58:42,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:42,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:42,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:58:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:42,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:58:42,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520056106] [2020-07-20 21:58:42,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:58:42,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:58:42,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409142389] [2020-07-20 21:58:42,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:58:42,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:58:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:58:42,923 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 3 states. [2020-07-20 21:58:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:43,559 INFO L93 Difference]: Finished difference Result 1652 states and 2385 transitions. [2020-07-20 21:58:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:58:43,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-07-20 21:58:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:43,568 INFO L225 Difference]: With dead ends: 1652 [2020-07-20 21:58:43,568 INFO L226 Difference]: Without dead ends: 1102 [2020-07-20 21:58:43,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 21:58:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2020-07-20 21:58:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1102. [2020-07-20 21:58:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-07-20 21:58:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1504 transitions. [2020-07-20 21:58:43,641 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1504 transitions. Word has length 111 [2020-07-20 21:58:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:43,642 INFO L479 AbstractCegarLoop]: Abstraction has 1102 states and 1504 transitions. [2020-07-20 21:58:43,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:58:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1504 transitions. [2020-07-20 21:58:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-07-20 21:58:43,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:43,647 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-07-20 21:58:43,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:43,861 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:43,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2022552526, now seen corresponding path program 1 times [2020-07-20 21:58:43,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:43,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537131416] [2020-07-20 21:58:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:58:44,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:44,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:44,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:58:44,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:44,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:58:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:44,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537131416] [2020-07-20 21:58:44,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:58:44,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 21:58:44,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570313943] [2020-07-20 21:58:44,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:58:44,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:58:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:58:44,140 INFO L87 Difference]: Start difference. First operand 1102 states and 1504 transitions. Second operand 8 states. [2020-07-20 21:58:46,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:46,265 INFO L93 Difference]: Finished difference Result 4220 states and 6124 transitions. [2020-07-20 21:58:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:58:46,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2020-07-20 21:58:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:46,294 INFO L225 Difference]: With dead ends: 4220 [2020-07-20 21:58:46,295 INFO L226 Difference]: Without dead ends: 3124 [2020-07-20 21:58:46,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:58:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2020-07-20 21:58:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 2349. [2020-07-20 21:58:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2020-07-20 21:58:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3071 transitions. [2020-07-20 21:58:46,474 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3071 transitions. Word has length 119 [2020-07-20 21:58:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:46,475 INFO L479 AbstractCegarLoop]: Abstraction has 2349 states and 3071 transitions. [2020-07-20 21:58:46,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:58:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3071 transitions. [2020-07-20 21:58:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-20 21:58:46,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:46,486 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 21:58:46,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:46,700 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:46,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash 308691738, now seen corresponding path program 1 times [2020-07-20 21:58:46,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:46,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813644184] [2020-07-20 21:58:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:58:46,851 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:58:46,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:46,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:58:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:46,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813644184] [2020-07-20 21:58:46,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:58:46,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 21:58:46,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513865706] [2020-07-20 21:58:46,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:58:46,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:46,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:58:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:58:46,978 INFO L87 Difference]: Start difference. First operand 2349 states and 3071 transitions. Second operand 7 states. [2020-07-20 21:58:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:48,809 INFO L93 Difference]: Finished difference Result 7590 states and 10616 transitions. [2020-07-20 21:58:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:58:48,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-07-20 21:58:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:48,848 INFO L225 Difference]: With dead ends: 7590 [2020-07-20 21:58:48,848 INFO L226 Difference]: Without dead ends: 5251 [2020-07-20 21:58:48,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 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 21:58:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2020-07-20 21:58:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4567. [2020-07-20 21:58:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4567 states. [2020-07-20 21:58:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 5929 transitions. [2020-07-20 21:58:49,079 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 5929 transitions. Word has length 131 [2020-07-20 21:58:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:49,079 INFO L479 AbstractCegarLoop]: Abstraction has 4567 states and 5929 transitions. [2020-07-20 21:58:49,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:58:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 5929 transitions. [2020-07-20 21:58:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:58:49,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:49,096 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:49,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:49,311 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash -720996718, now seen corresponding path program 1 times [2020-07-20 21:58:49,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:49,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588891276] [2020-07-20 21:58:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:58:49,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:49,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:49,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:58:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:58:49,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:58:49,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588891276] [2020-07-20 21:58:49,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:58:49,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:58:49,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413788905] [2020-07-20 21:58:49,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:58:49,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:58:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:58:49,511 INFO L87 Difference]: Start difference. First operand 4567 states and 5929 transitions. Second operand 3 states. [2020-07-20 21:58:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:50,191 INFO L93 Difference]: Finished difference Result 11993 states and 15911 transitions. [2020-07-20 21:58:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:58:50,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-07-20 21:58:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:50,231 INFO L225 Difference]: With dead ends: 11993 [2020-07-20 21:58:50,231 INFO L226 Difference]: Without dead ends: 7436 [2020-07-20 21:58:50,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 21:58:50,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7436 states. [2020-07-20 21:58:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7436 to 5665. [2020-07-20 21:58:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5665 states. [2020-07-20 21:58:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5665 states to 5665 states and 7367 transitions. [2020-07-20 21:58:50,438 INFO L78 Accepts]: Start accepts. Automaton has 5665 states and 7367 transitions. Word has length 135 [2020-07-20 21:58:50,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:50,439 INFO L479 AbstractCegarLoop]: Abstraction has 5665 states and 7367 transitions. [2020-07-20 21:58:50,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:58:50,439 INFO L276 IsEmpty]: Start isEmpty. Operand 5665 states and 7367 transitions. [2020-07-20 21:58:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 21:58:50,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:50,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:50,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:50,669 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash -676972618, now seen corresponding path program 1 times [2020-07-20 21:58:50,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:50,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349297521] [2020-07-20 21:58:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:58:50,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:50,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:50,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:58:50,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:50,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:58:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:58:50,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349297521] [2020-07-20 21:58:50,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:58:50,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 21:58:50,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344277851] [2020-07-20 21:58:50,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:58:50,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:50,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:58:50,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:58:50,961 INFO L87 Difference]: Start difference. First operand 5665 states and 7367 transitions. Second operand 7 states. [2020-07-20 21:58:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:51,922 INFO L93 Difference]: Finished difference Result 10413 states and 13551 transitions. [2020-07-20 21:58:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:58:51,923 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-07-20 21:58:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:51,956 INFO L225 Difference]: With dead ends: 10413 [2020-07-20 21:58:51,956 INFO L226 Difference]: Without dead ends: 6245 [2020-07-20 21:58:51,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:58:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2020-07-20 21:58:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 5669. [2020-07-20 21:58:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5669 states. [2020-07-20 21:58:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5669 states to 5669 states and 7057 transitions. [2020-07-20 21:58:52,143 INFO L78 Accepts]: Start accepts. Automaton has 5669 states and 7057 transitions. Word has length 142 [2020-07-20 21:58:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:52,144 INFO L479 AbstractCegarLoop]: Abstraction has 5669 states and 7057 transitions. [2020-07-20 21:58:52,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:58:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5669 states and 7057 transitions. [2020-07-20 21:58:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-20 21:58:52,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:52,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:52,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:52,375 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash 809347390, now seen corresponding path program 1 times [2020-07-20 21:58:52,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:52,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709567070] [2020-07-20 21:58:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 21:58:52,540 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:52,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:58:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:58:52,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:58:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:58:52,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709567070] [2020-07-20 21:58:52,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:58:52,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-07-20 21:58:52,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20477851] [2020-07-20 21:58:52,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:58:52,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:52,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:58:52,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:58:52,689 INFO L87 Difference]: Start difference. First operand 5669 states and 7057 transitions. Second operand 5 states. [2020-07-20 21:58:53,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:53,384 INFO L93 Difference]: Finished difference Result 5677 states and 7068 transitions. [2020-07-20 21:58:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:58:53,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-07-20 21:58:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:53,419 INFO L225 Difference]: With dead ends: 5677 [2020-07-20 21:58:53,424 INFO L226 Difference]: Without dead ends: 5675 [2020-07-20 21:58:53,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 286 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:58:53,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5675 states. [2020-07-20 21:58:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5675 to 5387. [2020-07-20 21:58:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5387 states. [2020-07-20 21:58:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 6705 transitions. [2020-07-20 21:58:53,561 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 6705 transitions. Word has length 146 [2020-07-20 21:58:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:53,562 INFO L479 AbstractCegarLoop]: Abstraction has 5387 states and 6705 transitions. [2020-07-20 21:58:53,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:58:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 6705 transitions. [2020-07-20 21:58:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-20 21:58:53,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:53,649 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:58:53,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:53,850 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash -742331683, now seen corresponding path program 1 times [2020-07-20 21:58:53,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:53,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91727363] [2020-07-20 21:58:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 21:58:53,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:53,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:58:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:58:54,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:58:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:58:54,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91727363] [2020-07-20 21:58:54,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:58:54,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 21:58:54,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340522867] [2020-07-20 21:58:54,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:58:54,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:54,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:58:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:58:54,116 INFO L87 Difference]: Start difference. First operand 5387 states and 6705 transitions. Second operand 6 states. [2020-07-20 21:58:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:54,994 INFO L93 Difference]: Finished difference Result 9692 states and 12174 transitions. [2020-07-20 21:58:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:58:54,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2020-07-20 21:58:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:55,014 INFO L225 Difference]: With dead ends: 9692 [2020-07-20 21:58:55,014 INFO L226 Difference]: Without dead ends: 6096 [2020-07-20 21:58:55,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 298 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 21:58:55,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6096 states. [2020-07-20 21:58:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6096 to 5808. [2020-07-20 21:58:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5808 states. [2020-07-20 21:58:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5808 states to 5808 states and 7020 transitions. [2020-07-20 21:58:55,138 INFO L78 Accepts]: Start accepts. Automaton has 5808 states and 7020 transitions. Word has length 151 [2020-07-20 21:58:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:55,138 INFO L479 AbstractCegarLoop]: Abstraction has 5808 states and 7020 transitions. [2020-07-20 21:58:55,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:58:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5808 states and 7020 transitions. [2020-07-20 21:58:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-20 21:58:55,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:55,152 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-07-20 21:58:55,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:55,368 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1695161737, now seen corresponding path program 1 times [2020-07-20 21:58:55,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:55,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401364727] [2020-07-20 21:58:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:55,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:55,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:55,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:58:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 21:58:55,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:58:55,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401364727] [2020-07-20 21:58:55,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:58:55,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:58:55,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855198085] [2020-07-20 21:58:55,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:58:55,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:55,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:58:55,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:58:55,586 INFO L87 Difference]: Start difference. First operand 5808 states and 7020 transitions. Second operand 3 states. [2020-07-20 21:58:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:56,123 INFO L93 Difference]: Finished difference Result 5810 states and 7021 transitions. [2020-07-20 21:58:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:58:56,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-07-20 21:58:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:56,141 INFO L225 Difference]: With dead ends: 5810 [2020-07-20 21:58:56,141 INFO L226 Difference]: Without dead ends: 5808 [2020-07-20 21:58:56,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 21:58:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2020-07-20 21:58:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5808. [2020-07-20 21:58:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5808 states. [2020-07-20 21:58:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5808 states to 5808 states and 7019 transitions. [2020-07-20 21:58:56,266 INFO L78 Accepts]: Start accepts. Automaton has 5808 states and 7019 transitions. Word has length 161 [2020-07-20 21:58:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:56,267 INFO L479 AbstractCegarLoop]: Abstraction has 5808 states and 7019 transitions. [2020-07-20 21:58:56,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:58:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5808 states and 7019 transitions. [2020-07-20 21:58:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-07-20 21:58:56,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:58:56,285 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-20 21:58:56,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:56,500 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:58:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:58:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1628827276, now seen corresponding path program 1 times [2020-07-20 21:58:56,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:58:56,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622605328] [2020-07-20 21:58:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:56,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:58:56,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:58:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:58:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:58:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-07-20 21:58:56,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:58:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 142 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-20 21:58:56,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622605328] [2020-07-20 21:58:56,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:58:56,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 21:58:56,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517066160] [2020-07-20 21:58:56,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:58:56,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:58:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:58:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:58:56,853 INFO L87 Difference]: Start difference. First operand 5808 states and 7019 transitions. Second operand 7 states. [2020-07-20 21:58:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:58:58,433 INFO L93 Difference]: Finished difference Result 9081 states and 11033 transitions. [2020-07-20 21:58:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:58:58,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 214 [2020-07-20 21:58:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:58:58,435 INFO L225 Difference]: With dead ends: 9081 [2020-07-20 21:58:58,435 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:58:58,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:58:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:58:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:58:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:58:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:58:58,458 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2020-07-20 21:58:58,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:58:58,459 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:58:58,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:58:58,459 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:58:58,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:58:58,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:58:58,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:58:59,889 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 143 [2020-07-20 21:59:00,308 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 143 [2020-07-20 21:59:03,176 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 225 DAG size of output: 112 [2020-07-20 21:59:04,092 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 64 [2020-07-20 21:59:05,022 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 64 [2020-07-20 21:59:05,027 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:59:05,028 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (<= ~a8~0 |old(~a8~0)|) (<= ~a16~0 |old(~a16~0)|) (= ~a7~0 |old(~a7~0)|) (<= |old(~a16~0)| ~a16~0) (= ~a21~0 |old(~a21~0)|)) [2020-07-20 21:59:05,028 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:59:05,028 INFO L268 CegarLoopResult]: For program point L333(lines 333 390) no Hoare annotation was computed. [2020-07-20 21:59:05,028 INFO L268 CegarLoopResult]: For program point L102(lines 102 390) no Hoare annotation was computed. [2020-07-20 21:59:05,029 INFO L268 CegarLoopResult]: For program point L565-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,029 INFO L268 CegarLoopResult]: For program point L532-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,029 INFO L268 CegarLoopResult]: For program point L499-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,029 INFO L268 CegarLoopResult]: For program point L466-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,029 INFO L268 CegarLoopResult]: For program point L433-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,029 INFO L268 CegarLoopResult]: For program point L400-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,029 INFO L268 CegarLoopResult]: For program point L268(lines 268 390) no Hoare annotation was computed. [2020-07-20 21:59:05,029 INFO L268 CegarLoopResult]: For program point L136(lines 136 390) no Hoare annotation was computed. [2020-07-20 21:59:05,030 INFO L268 CegarLoopResult]: For program point L566(line 566) no Hoare annotation was computed. [2020-07-20 21:59:05,030 INFO L268 CegarLoopResult]: For program point L533(line 533) no Hoare annotation was computed. [2020-07-20 21:59:05,030 INFO L268 CegarLoopResult]: For program point L500(line 500) no Hoare annotation was computed. [2020-07-20 21:59:05,030 INFO L268 CegarLoopResult]: For program point L467(line 467) no Hoare annotation was computed. [2020-07-20 21:59:05,030 INFO L268 CegarLoopResult]: For program point L434(line 434) no Hoare annotation was computed. [2020-07-20 21:59:05,030 INFO L268 CegarLoopResult]: For program point L401(line 401) no Hoare annotation was computed. [2020-07-20 21:59:05,030 INFO L268 CegarLoopResult]: For program point L203(lines 203 390) no Hoare annotation was computed. [2020-07-20 21:59:05,030 INFO L268 CegarLoopResult]: For program point L72(lines 72 390) no Hoare annotation was computed. [2020-07-20 21:59:05,031 INFO L268 CegarLoopResult]: For program point L568-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,031 INFO L268 CegarLoopResult]: For program point L535-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,031 INFO L268 CegarLoopResult]: For program point L502-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,031 INFO L268 CegarLoopResult]: For program point L469-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,031 INFO L268 CegarLoopResult]: For program point L436-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,031 INFO L268 CegarLoopResult]: For program point L403-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,031 INFO L268 CegarLoopResult]: For program point L337(lines 337 390) no Hoare annotation was computed. [2020-07-20 21:59:05,032 INFO L268 CegarLoopResult]: For program point L238(lines 238 390) no Hoare annotation was computed. [2020-07-20 21:59:05,032 INFO L268 CegarLoopResult]: For program point L569(line 569) no Hoare annotation was computed. [2020-07-20 21:59:05,032 INFO L268 CegarLoopResult]: For program point L536(line 536) no Hoare annotation was computed. [2020-07-20 21:59:05,032 INFO L268 CegarLoopResult]: For program point L503(line 503) no Hoare annotation was computed. [2020-07-20 21:59:05,032 INFO L268 CegarLoopResult]: For program point L470(line 470) no Hoare annotation was computed. [2020-07-20 21:59:05,032 INFO L268 CegarLoopResult]: For program point L437(line 437) no Hoare annotation was computed. [2020-07-20 21:59:05,032 INFO L268 CegarLoopResult]: For program point L404(line 404) no Hoare annotation was computed. [2020-07-20 21:59:05,032 INFO L268 CegarLoopResult]: For program point L173(lines 173 390) no Hoare annotation was computed. [2020-07-20 21:59:05,033 INFO L268 CegarLoopResult]: For program point L140(lines 140 390) no Hoare annotation was computed. [2020-07-20 21:59:05,033 INFO L268 CegarLoopResult]: For program point L372(lines 372 390) no Hoare annotation was computed. [2020-07-20 21:59:05,033 INFO L268 CegarLoopResult]: For program point calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION(line 458) no Hoare annotation was computed. [2020-07-20 21:59:05,033 INFO L268 CegarLoopResult]: For program point L306(lines 306 390) no Hoare annotation was computed. [2020-07-20 21:59:05,033 INFO L268 CegarLoopResult]: For program point L273(lines 273 390) no Hoare annotation was computed. [2020-07-20 21:59:05,033 INFO L268 CegarLoopResult]: For program point L108(lines 108 390) no Hoare annotation was computed. [2020-07-20 21:59:05,033 INFO L268 CegarLoopResult]: For program point L571-1(lines 571 573) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L538-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L505-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L472-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L439-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L406-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L208(lines 208 390) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L43(lines 43 390) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L572(line 572) no Hoare annotation was computed. [2020-07-20 21:59:05,034 INFO L268 CegarLoopResult]: For program point L539(line 539) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L506(line 506) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L473(line 473) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L440(line 440) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L407(line 407) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L144(lines 144 390) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L541-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L508-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L475-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,035 INFO L268 CegarLoopResult]: For program point L442-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,036 INFO L268 CegarLoopResult]: For program point L409-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,036 INFO L268 CegarLoopResult]: For program point L178(lines 178 390) no Hoare annotation was computed. [2020-07-20 21:59:05,036 INFO L268 CegarLoopResult]: For program point L542(line 542) no Hoare annotation was computed. [2020-07-20 21:59:05,036 INFO L268 CegarLoopResult]: For program point L509(line 509) no Hoare annotation was computed. [2020-07-20 21:59:05,036 INFO L268 CegarLoopResult]: For program point L476(line 476) no Hoare annotation was computed. [2020-07-20 21:59:05,036 INFO L268 CegarLoopResult]: For program point L443(line 443) no Hoare annotation was computed. [2020-07-20 21:59:05,036 INFO L268 CegarLoopResult]: For program point L410(line 410) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L377(lines 377 390) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L278(lines 278 390) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L245(lines 245 390) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L80(lines 80 390) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L345(lines 345 390) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L312(lines 312 390) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L114(lines 114 390) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L544-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,037 INFO L268 CegarLoopResult]: For program point L511-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,038 INFO L268 CegarLoopResult]: For program point L478-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,038 INFO L268 CegarLoopResult]: For program point L445-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,038 INFO L268 CegarLoopResult]: For program point L412-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,038 INFO L268 CegarLoopResult]: For program point L214(lines 214 390) no Hoare annotation was computed. [2020-07-20 21:59:05,038 INFO L268 CegarLoopResult]: For program point L148(lines 148 390) no Hoare annotation was computed. [2020-07-20 21:59:05,038 INFO L268 CegarLoopResult]: For program point L49(lines 49 390) no Hoare annotation was computed. [2020-07-20 21:59:05,038 INFO L268 CegarLoopResult]: For program point L545(line 545) no Hoare annotation was computed. [2020-07-20 21:59:05,038 INFO L268 CegarLoopResult]: For program point L512(line 512) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point L479(line 479) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point L446(line 446) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point L413(line 413) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point L84(lines 84 390) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point calculate_outputFINAL(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point calculate_outputEXIT(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point L547-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point L514-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point L481-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,039 INFO L268 CegarLoopResult]: For program point L448-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L382(lines 382 390) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L415-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L316(lines 316 390) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L250(lines 250 390) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L548(line 548) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L515(line 515) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L482(line 482) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L449(line 449) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L416(line 416) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L218(lines 218 390) no Hoare annotation was computed. [2020-07-20 21:59:05,040 INFO L268 CegarLoopResult]: For program point L152(lines 152 390) no Hoare annotation was computed. [2020-07-20 21:59:05,041 INFO L268 CegarLoopResult]: For program point L119(lines 119 390) no Hoare annotation was computed. [2020-07-20 21:59:05,041 INFO L268 CegarLoopResult]: For program point L318(lines 318 390) no Hoare annotation was computed. [2020-07-20 21:59:05,041 INFO L268 CegarLoopResult]: For program point L186(lines 186 390) no Hoare annotation was computed. [2020-07-20 21:59:05,041 INFO L268 CegarLoopResult]: For program point L54(lines 54 390) no Hoare annotation was computed. [2020-07-20 21:59:05,041 INFO L268 CegarLoopResult]: For program point L550-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,041 INFO L268 CegarLoopResult]: For program point L517-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,041 INFO L268 CegarLoopResult]: For program point L484-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,041 INFO L268 CegarLoopResult]: For program point L451-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,042 INFO L268 CegarLoopResult]: For program point L418-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,042 INFO L268 CegarLoopResult]: For program point L286(lines 286 390) no Hoare annotation was computed. [2020-07-20 21:59:05,042 INFO L268 CegarLoopResult]: For program point L551(line 551) no Hoare annotation was computed. [2020-07-20 21:59:05,042 INFO L268 CegarLoopResult]: For program point L518(line 518) no Hoare annotation was computed. [2020-07-20 21:59:05,042 INFO L268 CegarLoopResult]: For program point L485(line 485) no Hoare annotation was computed. [2020-07-20 21:59:05,042 INFO L268 CegarLoopResult]: For program point L452(line 452) no Hoare annotation was computed. [2020-07-20 21:59:05,042 INFO L268 CegarLoopResult]: For program point L419(line 419) no Hoare annotation was computed. [2020-07-20 21:59:05,042 INFO L268 CegarLoopResult]: For program point L353(lines 353 390) no Hoare annotation was computed. [2020-07-20 21:59:05,043 INFO L268 CegarLoopResult]: For program point L189(lines 189 390) no Hoare annotation was computed. [2020-07-20 21:59:05,043 INFO L268 CegarLoopResult]: For program point L553-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,043 INFO L268 CegarLoopResult]: For program point L520-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,043 INFO L268 CegarLoopResult]: For program point L487-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,043 INFO L268 CegarLoopResult]: For program point L454-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,043 INFO L268 CegarLoopResult]: For program point L421-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,043 INFO L268 CegarLoopResult]: For program point L355(lines 355 390) no Hoare annotation was computed. [2020-07-20 21:59:05,043 INFO L268 CegarLoopResult]: For program point L256(lines 256 390) no Hoare annotation was computed. [2020-07-20 21:59:05,044 INFO L268 CegarLoopResult]: For program point L223(lines 223 390) no Hoare annotation was computed. [2020-07-20 21:59:05,044 INFO L268 CegarLoopResult]: For program point L124(lines 124 390) no Hoare annotation was computed. [2020-07-20 21:59:05,044 INFO L268 CegarLoopResult]: For program point L554(line 554) no Hoare annotation was computed. [2020-07-20 21:59:05,044 INFO L268 CegarLoopResult]: For program point L521(line 521) no Hoare annotation was computed. [2020-07-20 21:59:05,044 INFO L268 CegarLoopResult]: For program point L488(line 488) no Hoare annotation was computed. [2020-07-20 21:59:05,044 INFO L268 CegarLoopResult]: For program point L455(line 455) no Hoare annotation was computed. [2020-07-20 21:59:05,044 INFO L268 CegarLoopResult]: For program point L422(line 422) no Hoare annotation was computed. [2020-07-20 21:59:05,044 INFO L268 CegarLoopResult]: For program point L92(lines 92 390) no Hoare annotation was computed. [2020-07-20 21:59:05,045 INFO L264 CegarLoopResult]: At program point calculate_outputENTRY(lines 30 575) the Hoare annotation is: (let ((.cse0 (not (= 1 |old(~a20~0)|))) (.cse8 (not (<= |old(~a8~0)| 13)))) (let ((.cse19 (or .cse0 .cse8)) (.cse20 (not (<= |old(~a16~0)| 5))) (.cse21 (not (< |old(~a8~0)| 15)))) (let ((.cse25 (<= ~a16~0 5)) (.cse27 (< ~a8~0 15)) (.cse11 (<= ~a8~0 |old(~a8~0)|)) (.cse12 (<= ~a16~0 |old(~a16~0)|)) (.cse13 (<= ~a8~0 13)) (.cse18 (<= ~a17~0 0)) (.cse3 (= 1 ~a20~0)) (.cse14 (= ~a21~0 |old(~a21~0)|)) (.cse26 (and .cse19 (or .cse0 .cse20 .cse21))) (.cse5 (not (<= |old(~a17~0)| 0)))) (let ((.cse9 (not (<= |old(~a16~0)| 4))) (.cse7 (and (or .cse26 .cse5) (or .cse20 .cse21 .cse5))) (.cse23 (= ~a7~0 |old(~a7~0)|)) (.cse15 (and (or (and .cse11 .cse12 .cse18 .cse25 .cse27) (and .cse11 .cse12 .cse13 .cse18 .cse3)) .cse14)) (.cse24 (<= 15 ~a8~0)) (.cse6 (not (<= |old(~a21~0)| 0))) (.cse10 (not (= 1 |old(~a7~0)|))) (.cse16 (= 1 ~a7~0)) (.cse17 (<= |old(~a16~0)| ~a16~0)) (.cse22 (not (<= 5 |old(~a16~0)|))) (.cse1 (not (<= 15 |old(~a8~0)|))) (.cse2 (not (<= |old(~a7~0)| 0))) (.cse4 (not (= 1 |old(~a21~0)|)))) (and (or .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (or (and (or .cse6 .cse7) (or .cse6 .cse8 .cse9)) .cse10 (and (or (and .cse11 .cse12 .cse13 .cse14 (<= ~a16~0 4)) .cse15) .cse16 .cse17)) (or .cse18 (and .cse19 (or .cse20 .cse21)) .cse4 .cse22 .cse5) (or .cse11 .cse0 .cse6 .cse10 .cse8) (or .cse1 .cse2 (and .cse11 .cse12 .cse23 .cse17 .cse24 .cse14) .cse4) (or .cse1 .cse10 (and .cse11 .cse12 .cse16 .cse17 .cse18 .cse24 .cse14) .cse9 .cse4 .cse5) (or .cse0 .cse1 .cse2 .cse3 .cse22 .cse4) (or (and (or (and (or .cse0 .cse2 .cse8) (or .cse2 .cse20)) .cse4) (or .cse0 .cse8 .cse9 .cse4) (or .cse7 .cse4)) (and .cse23 .cse17 (or (and .cse12 .cse11 (<= ~a7~0 0) .cse25 .cse14) (and .cse11 .cse12 .cse13 .cse3 .cse14) .cse15))) (or .cse1 .cse10 .cse20 (and .cse11 .cse16 .cse18 .cse25 .cse24 (<= 5 ~a16~0) .cse14) .cse22 .cse4 .cse5) (or .cse6 .cse10 .cse26 (and .cse16 (or (and .cse25 .cse27 .cse3) (and .cse12 .cse13 .cse3)) .cse17 .cse14) .cse22) (or .cse1 .cse18 .cse2 .cse4 .cse5)))))) [2020-07-20 21:59:05,045 INFO L268 CegarLoopResult]: For program point L324(lines 324 390) no Hoare annotation was computed. [2020-07-20 21:59:05,045 INFO L268 CegarLoopResult]: For program point L556-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,045 INFO L268 CegarLoopResult]: For program point L523-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,045 INFO L268 CegarLoopResult]: For program point L490-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,046 INFO L268 CegarLoopResult]: For program point L457-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,046 INFO L268 CegarLoopResult]: For program point L391(lines 391 393) no Hoare annotation was computed. [2020-07-20 21:59:05,046 INFO L268 CegarLoopResult]: For program point L424-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,046 INFO L268 CegarLoopResult]: For program point L391-2(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,046 INFO L268 CegarLoopResult]: For program point L292(lines 292 390) no Hoare annotation was computed. [2020-07-20 21:59:05,046 INFO L268 CegarLoopResult]: For program point L160(lines 160 390) no Hoare annotation was computed. [2020-07-20 21:59:05,046 INFO L268 CegarLoopResult]: For program point L557(line 557) no Hoare annotation was computed. [2020-07-20 21:59:05,046 INFO L268 CegarLoopResult]: For program point L524(line 524) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L491(line 491) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L458(line 458) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L425(line 425) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L392(line 392) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L194(lines 194 390) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L62(lines 62 390) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L261(lines 261 390) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L129(lines 129 390) no Hoare annotation was computed. [2020-07-20 21:59:05,047 INFO L268 CegarLoopResult]: For program point L559-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L526-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L493-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L460-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L427-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L361(lines 361 390) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L394-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L97(lines 97 390) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L31(lines 31 390) no Hoare annotation was computed. [2020-07-20 21:59:05,048 INFO L268 CegarLoopResult]: For program point L560(line 560) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L527(line 527) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L494(line 494) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L461(line 461) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L428(line 428) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L395(line 395) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L329(lines 329 390) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L197(lines 197 390) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L65(lines 65 390) no Hoare annotation was computed. [2020-07-20 21:59:05,049 INFO L268 CegarLoopResult]: For program point L363(lines 363 390) no Hoare annotation was computed. [2020-07-20 21:59:05,050 INFO L268 CegarLoopResult]: For program point L231(lines 231 390) no Hoare annotation was computed. [2020-07-20 21:59:05,050 INFO L268 CegarLoopResult]: For program point L165(lines 165 390) no Hoare annotation was computed. [2020-07-20 21:59:05,050 INFO L268 CegarLoopResult]: For program point L562-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,050 INFO L268 CegarLoopResult]: For program point L529-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,050 INFO L268 CegarLoopResult]: For program point L496-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,050 INFO L268 CegarLoopResult]: For program point L463-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,050 INFO L268 CegarLoopResult]: For program point L430-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,050 INFO L268 CegarLoopResult]: For program point L397-1(lines 30 575) no Hoare annotation was computed. [2020-07-20 21:59:05,051 INFO L268 CegarLoopResult]: For program point L265(lines 265 390) no Hoare annotation was computed. [2020-07-20 21:59:05,051 INFO L268 CegarLoopResult]: For program point L563(line 563) no Hoare annotation was computed. [2020-07-20 21:59:05,051 INFO L268 CegarLoopResult]: For program point L530(line 530) no Hoare annotation was computed. [2020-07-20 21:59:05,051 INFO L268 CegarLoopResult]: For program point L497(line 497) no Hoare annotation was computed. [2020-07-20 21:59:05,051 INFO L268 CegarLoopResult]: For program point L464(line 464) no Hoare annotation was computed. [2020-07-20 21:59:05,051 INFO L268 CegarLoopResult]: For program point L431(line 431) no Hoare annotation was computed. [2020-07-20 21:59:05,051 INFO L268 CegarLoopResult]: For program point L398(line 398) no Hoare annotation was computed. [2020-07-20 21:59:05,051 INFO L268 CegarLoopResult]: For program point L365(lines 365 390) no Hoare annotation was computed. [2020-07-20 21:59:05,052 INFO L268 CegarLoopResult]: For program point L299(lines 299 390) no Hoare annotation was computed. [2020-07-20 21:59:05,052 INFO L268 CegarLoopResult]: For program point L35(lines 35 390) no Hoare annotation was computed. [2020-07-20 21:59:05,052 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:59:05,052 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~a7~0 0) (<= ~a16~0 5) (<= 15 ~a8~0) (<= 5 ~a16~0) (= 1 ~a21~0) (= 1 ~a20~0)) [2020-07-20 21:59:05,052 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:59:05,052 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:59:05,052 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 577 594) the Hoare annotation is: (or (not (= 1 |old(~a20~0)|)) (not (<= 15 |old(~a8~0)|)) (and (<= ~a8~0 |old(~a8~0)|) (= ~a7~0 |old(~a7~0)|) (<= ~a16~0 5) (<= 15 ~a8~0) (<= 5 ~a16~0) (= 1 ~a20~0) (= ~a21~0 |old(~a21~0)|)) (not (<= |old(~a7~0)| 0)) (not (<= |old(~a16~0)| 5)) (not (<= 5 |old(~a16~0)|)) (not (= 1 |old(~a21~0)|))) [2020-07-20 21:59:05,053 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 577 594) no Hoare annotation was computed. [2020-07-20 21:59:05,053 INFO L264 CegarLoopResult]: At program point L591(line 591) the Hoare annotation is: (let ((.cse7 (<= ~a8~0 13)) (.cse2 (<= ~a16~0 5)) (.cse4 (< ~a8~0 15)) (.cse10 (= 1 ~a20~0))) (let ((.cse1 (<= ~a17~0 0)) (.cse0 (= 1 ~a7~0)) (.cse6 (<= ~a21~0 0)) (.cse5 (or (and .cse7 .cse10) (and .cse2 .cse4 .cse10))) (.cse9 (<= ~a7~0 0)) (.cse3 (= 1 ~a21~0)) (.cse8 (<= ~a16~0 4))) (or (not (<= |old(~a7~0)| 0)) (and .cse0 .cse1 .cse2 .cse3) (and (or (and .cse1 .cse2 .cse4) (and .cse1 .cse5)) .cse3) (and .cse0 (or (and .cse6 .cse1 .cse2 .cse4) (and .cse7 .cse6 .cse8))) (not (<= 5 |old(~a16~0)|)) (and (or (and .cse9 .cse2) (and .cse7 .cse9 .cse10)) .cse3) (and .cse0 .cse6 .cse5 (<= 5 ~a16~0)) (not (= 1 |old(~a20~0)|)) (not (<= 15 |old(~a8~0)|)) (and .cse9 (<= 15 ~a8~0) .cse3) (not (<= |old(~a16~0)| 5)) (not (= 1 |old(~a21~0)|)) (and .cse7 .cse3 .cse10 .cse8)))) [2020-07-20 21:59:05,053 INFO L268 CegarLoopResult]: For program point L591-1(line 591) no Hoare annotation was computed. [2020-07-20 21:59:05,053 INFO L268 CegarLoopResult]: For program point L588(line 588) no Hoare annotation was computed. [2020-07-20 21:59:05,053 INFO L264 CegarLoopResult]: At program point L583-2(lines 583 593) the Hoare annotation is: (let ((.cse7 (<= ~a8~0 13)) (.cse2 (<= ~a16~0 5)) (.cse4 (< ~a8~0 15)) (.cse10 (= 1 ~a20~0))) (let ((.cse1 (<= ~a17~0 0)) (.cse0 (= 1 ~a7~0)) (.cse6 (<= ~a21~0 0)) (.cse5 (or (and .cse7 .cse10) (and .cse2 .cse4 .cse10))) (.cse9 (<= ~a7~0 0)) (.cse3 (= 1 ~a21~0)) (.cse8 (<= ~a16~0 4))) (or (not (<= |old(~a7~0)| 0)) (and .cse0 .cse1 .cse2 .cse3) (and (or (and .cse1 .cse2 .cse4) (and .cse1 .cse5)) .cse3) (and .cse0 (or (and .cse6 .cse1 .cse2 .cse4) (and .cse7 .cse6 .cse8))) (not (<= 5 |old(~a16~0)|)) (and (or (and .cse9 .cse2) (and .cse7 .cse9 .cse10)) .cse3) (and .cse0 .cse6 .cse5 (<= 5 ~a16~0)) (not (= 1 |old(~a20~0)|)) (not (<= 15 |old(~a8~0)|)) (and .cse9 (<= 15 ~a8~0) .cse3) (not (<= |old(~a16~0)| 5)) (not (= 1 |old(~a21~0)|)) (and .cse7 .cse3 .cse10 .cse8)))) [2020-07-20 21:59:05,054 INFO L268 CegarLoopResult]: For program point L583-3(lines 577 594) no Hoare annotation was computed. [2020-07-20 21:59:05,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:59:05 BoogieIcfgContainer [2020-07-20 21:59:05,077 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:59:05,079 INFO L168 Benchmark]: Toolchain (without parser) took 28199.81 ms. Allocated memory was 137.4 MB in the beginning and 555.2 MB in the end (delta: 417.9 MB). Free memory was 100.1 MB in the beginning and 370.4 MB in the end (delta: -270.4 MB). Peak memory consumption was 444.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:59:05,081 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 21:59:05,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 942.64 ms. Allocated memory was 137.4 MB in the beginning and 207.1 MB in the end (delta: 69.7 MB). Free memory was 99.7 MB in the beginning and 173.0 MB in the end (delta: -73.3 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:59:05,082 INFO L168 Benchmark]: Boogie Preprocessor took 119.69 ms. Allocated memory is still 207.1 MB. Free memory was 173.0 MB in the beginning and 167.9 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:59:05,083 INFO L168 Benchmark]: RCFGBuilder took 1466.32 ms. Allocated memory was 207.1 MB in the beginning and 237.5 MB in the end (delta: 30.4 MB). Free memory was 167.9 MB in the beginning and 181.6 MB in the end (delta: -13.7 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:59:05,084 INFO L168 Benchmark]: TraceAbstraction took 25663.82 ms. Allocated memory was 237.5 MB in the beginning and 555.2 MB in the end (delta: 317.7 MB). Free memory was 181.6 MB in the beginning and 370.4 MB in the end (delta: -188.8 MB). Peak memory consumption was 425.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:59:05,087 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 942.64 ms. Allocated memory was 137.4 MB in the beginning and 207.1 MB in the end (delta: 69.7 MB). Free memory was 99.7 MB in the beginning and 173.0 MB in the end (delta: -73.3 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.69 ms. Allocated memory is still 207.1 MB. Free memory was 173.0 MB in the beginning and 167.9 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1466.32 ms. Allocated memory was 207.1 MB in the beginning and 237.5 MB in the end (delta: 30.4 MB). Free memory was 167.9 MB in the beginning and 181.6 MB in the end (delta: -13.7 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25663.82 ms. Allocated memory was 237.5 MB in the beginning and 555.2 MB in the end (delta: 317.7 MB). Free memory was 181.6 MB in the beginning and 370.4 MB in the end (delta: -188.8 MB). Peak memory consumption was 425.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 458]: 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: 583]: Loop Invariant Derived loop invariant: (((((((((((!(\old(a7) <= 0) || (((1 == a7 && a17 <= 0) && a16 <= 5) && 1 == a21)) || ((((a17 <= 0 && a16 <= 5) && a8 < 15) || (a17 <= 0 && ((a8 <= 13 && 1 == a20) || ((a16 <= 5 && a8 < 15) && 1 == a20)))) && 1 == a21)) || (1 == a7 && ((((a21 <= 0 && a17 <= 0) && a16 <= 5) && a8 < 15) || ((a8 <= 13 && a21 <= 0) && a16 <= 4)))) || !(5 <= \old(a16))) || (((a7 <= 0 && a16 <= 5) || ((a8 <= 13 && a7 <= 0) && 1 == a20)) && 1 == a21)) || (((1 == a7 && a21 <= 0) && ((a8 <= 13 && 1 == a20) || ((a16 <= 5 && a8 < 15) && 1 == a20))) && 5 <= a16)) || !(1 == \old(a20))) || !(15 <= \old(a8))) || ((a7 <= 0 && 15 <= a8) && 1 == a21)) || !(\old(a16) <= 5)) || !(1 == \old(a21))) || (((a8 <= 13 && 1 == a21) && 1 == a20) && a16 <= 4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 207 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.1s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 546 SDtfs, 3800 SDslu, 387 SDs, 0 SdLazy, 8568 SolverSat, 1195 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2442 GetRequests, 2384 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5808occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 4396 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 206 PreInvPairs, 304 NumberOfFragments, 1046 HoareAnnotationTreeSize, 206 FomulaSimplifications, 221064 FormulaSimplificationTreeSizeReduction, 1.6s HoareSimplificationTime, 7 FomulaSimplificationsInter, 68998 FormulaSimplificationTreeSizeReductionInter, 4.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 1520 NumberOfCodeBlocks, 1520 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2406 ConstructedInterpolants, 0 QuantifiedInterpolants, 655103 SizeOfPredicates, 13 NumberOfNonLiveVariables, 4678 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 1000/1063 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...