/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 BIGGEST_EQUIVALENCE_CLASS --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/recursive-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:59:57,779 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:59:57,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:59:57,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:59:57,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:59:57,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:59:57,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:59:57,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:59:57,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:59:57,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:59:57,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:59:57,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:59:57,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:59:57,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:59:57,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:59:57,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:59:57,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:59:57,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:59:57,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:59:57,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:59:57,937 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:59:57,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:59:57,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:59:57,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:59:57,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:59:57,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:59:57,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:59:57,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:59:57,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:59:57,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:59:57,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:59:57,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:59:57,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:59:57,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:59:57,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:59:57,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:59:57,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:59:57,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:59:57,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:59:57,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:59:57,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:59:57,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:59:57,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:57,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:59:57,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:59:57,943 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 00:59:58,365 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:59:58,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:59:58,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:59:58,400 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:59:58,401 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:59:58,403 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-21 00:59:58,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f41bbd93/dd16d74fb2e449b7bbd84fb143f85507/FLAG6135c49ed [2020-07-21 00:59:59,492 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:59:59,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-21 00:59:59,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f41bbd93/dd16d74fb2e449b7bbd84fb143f85507/FLAG6135c49ed [2020-07-21 00:59:59,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f41bbd93/dd16d74fb2e449b7bbd84fb143f85507 [2020-07-21 00:59:59,895 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:59:59,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:59:59,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:59:59,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:59:59,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:59:59,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:59:59" (1/1) ... [2020-07-21 00:59:59,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78559edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:59, skipping insertion in model container [2020-07-21 00:59:59,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:59:59" (1/1) ... [2020-07-21 00:59:59,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:59:59,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:00:00,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:00:00,125 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:00:00,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:00:00,161 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:00:00,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00 WrapperNode [2020-07-21 01:00:00,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:00:00,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:00:00,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:00:00,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:00:00,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (1/1) ... [2020-07-21 01:00:00,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (1/1) ... [2020-07-21 01:00:00,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (1/1) ... [2020-07-21 01:00:00,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (1/1) ... [2020-07-21 01:00:00,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (1/1) ... [2020-07-21 01:00:00,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (1/1) ... [2020-07-21 01:00:00,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (1/1) ... [2020-07-21 01:00:00,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:00:00,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:00:00,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:00:00,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:00:00,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:00:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:00:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:00:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-21 01:00:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:00:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:00:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-21 01:00:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:00:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:00:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:00:00,579 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:00:00,581 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 01:00:00,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:00:00 BoogieIcfgContainer [2020-07-21 01:00:00,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:00:00,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:00:00,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:00:00,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:00:00,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:59:59" (1/3) ... [2020-07-21 01:00:00,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ebaf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:00:00, skipping insertion in model container [2020-07-21 01:00:00,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:00:00" (2/3) ... [2020-07-21 01:00:00,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ebaf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:00:00, skipping insertion in model container [2020-07-21 01:00:00,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:00:00" (3/3) ... [2020-07-21 01:00:00,599 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-07-21 01:00:00,608 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:00:00,615 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:00:00,630 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:00:00,659 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:00:00,659 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:00:00,659 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:00:00,660 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:00:00,660 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:00:00,660 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:00:00,661 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:00:00,661 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:00:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 01:00:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:00:00,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:00,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:00,693 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:00,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-21 01:00:00,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:00,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953007770] [2020-07-21 01:00:00,710 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 [2020-07-21 01:00:00,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:00:00,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:00,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:00:00,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:00:00,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:00:00,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953007770] [2020-07-21 01:00:00,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:00:00,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:00:00,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909113783] [2020-07-21 01:00:00,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:00:00,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:00,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:00:00,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:00:00,940 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 01:00:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:01,092 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 01:00:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:00:01,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 01:00:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:01,107 INFO L225 Difference]: With dead ends: 30 [2020-07-21 01:00:01,108 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 01:00:01,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:00:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 01:00:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 01:00:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 01:00:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 01:00:01,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 01:00:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:01,171 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 01:00:01,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:00:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 01:00:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:00:01,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:01,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:01,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:01,391 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:01,392 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-21 01:00:01,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:01,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393521159] [2020-07-21 01:00:01,394 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 [2020-07-21 01:00:01,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:00:01,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:00:01,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 01:00:01,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:01,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:00:01,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393521159] [2020-07-21 01:00:01,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:01,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 01:00:01,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406081765] [2020-07-21 01:00:01,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:00:01,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:00:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:00:01,800 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-21 01:00:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:01,898 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 01:00:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:00:01,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-21 01:00:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:01,900 INFO L225 Difference]: With dead ends: 25 [2020-07-21 01:00:01,901 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 01:00:01,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:00:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 01:00:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 01:00:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 01:00:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 01:00:01,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 01:00:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:01,910 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 01:00:01,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:00:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 01:00:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 01:00:01,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:01,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:02,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:02,115 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-21 01:00:02,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:02,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940915636] [2020-07-21 01:00:02,119 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 [2020-07-21 01:00:02,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:00:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:00:02,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 01:00:02,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:02,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:02,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:02,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:02,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:00:02,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940915636] [2020-07-21 01:00:02,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:02,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 01:00:02,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969379737] [2020-07-21 01:00:02,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 01:00:02,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 01:00:02,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:00:02,755 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-21 01:00:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:02,868 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 01:00:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:00:02,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-21 01:00:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:02,871 INFO L225 Difference]: With dead ends: 28 [2020-07-21 01:00:02,871 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 01:00:02,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:00:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 01:00:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 01:00:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 01:00:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 01:00:02,889 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 01:00:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:02,890 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 01:00:02,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 01:00:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 01:00:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 01:00:02,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:02,893 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:03,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:03,096 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-21 01:00:03,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:03,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050296069] [2020-07-21 01:00:03,099 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 [2020-07-21 01:00:03,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:00:03,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 01:00:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 01:00:03,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:03,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:03,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:03,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:03,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:03,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 01:00:03,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050296069] [2020-07-21 01:00:03,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:03,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 01:00:03,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698577191] [2020-07-21 01:00:03,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 01:00:03,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:03,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 01:00:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 01:00:03,749 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-21 01:00:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:03,858 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 01:00:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:00:03,858 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-21 01:00:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:03,860 INFO L225 Difference]: With dead ends: 31 [2020-07-21 01:00:03,860 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 01:00:03,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 01:00:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 01:00:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 01:00:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 01:00:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 01:00:03,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-21 01:00:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:03,867 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 01:00:03,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 01:00:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 01:00:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 01:00:03,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:03,869 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:04,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:04,070 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-21 01:00:04,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:04,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051393264] [2020-07-21 01:00:04,073 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 [2020-07-21 01:00:04,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:00:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:04,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:00:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 01:00:04,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:04,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:04,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:04,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:05,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:05,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 01:00:05,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051393264] [2020-07-21 01:00:05,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:05,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 01:00:05,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982268893] [2020-07-21 01:00:05,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 01:00:05,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:05,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 01:00:05,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 01:00:05,155 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-21 01:00:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:05,288 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 01:00:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:00:05,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-21 01:00:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:05,295 INFO L225 Difference]: With dead ends: 34 [2020-07-21 01:00:05,295 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 01:00:05,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 01:00:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 01:00:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 01:00:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 01:00:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-21 01:00:05,303 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-21 01:00:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:05,303 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-21 01:00:05,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 01:00:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-21 01:00:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 01:00:05,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:05,306 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:05,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:05,513 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-21 01:00:05,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:05,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423921267] [2020-07-21 01:00:05,515 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 [2020-07-21 01:00:05,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:00:05,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 01:00:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 01:00:05,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:06,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:06,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:06,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:06,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:07,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:07,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:07,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 01:00:07,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423921267] [2020-07-21 01:00:07,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:07,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 01:00:07,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804100640] [2020-07-21 01:00:07,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 01:00:07,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:07,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 01:00:07,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 01:00:07,129 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-21 01:00:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:07,301 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-21 01:00:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 01:00:07,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-21 01:00:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:07,304 INFO L225 Difference]: With dead ends: 37 [2020-07-21 01:00:07,304 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 01:00:07,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 01:00:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 01:00:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 01:00:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 01:00:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-21 01:00:07,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-21 01:00:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:07,315 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-21 01:00:07,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 01:00:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-21 01:00:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 01:00:07,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:07,317 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:07,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:07,532 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-21 01:00:07,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:07,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389095533] [2020-07-21 01:00:07,535 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 [2020-07-21 01:00:07,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:00:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 01:00:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-21 01:00:07,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:08,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:08,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:09,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:09,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:09,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:09,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:09,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:00:09,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389095533] [2020-07-21 01:00:09,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:09,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 01:00:09,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830273822] [2020-07-21 01:00:09,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 01:00:09,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:09,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 01:00:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 01:00:09,804 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-21 01:00:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:09,994 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-21 01:00:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:00:09,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-21 01:00:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:09,997 INFO L225 Difference]: With dead ends: 40 [2020-07-21 01:00:09,997 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 01:00:09,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 01:00:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 01:00:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 01:00:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 01:00:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 01:00:10,006 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-21 01:00:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:10,006 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 01:00:10,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 01:00:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 01:00:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 01:00:10,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:10,009 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:10,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:10,219 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:10,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-21 01:00:10,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:10,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048550286] [2020-07-21 01:00:10,222 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 [2020-07-21 01:00:10,305 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:00:10,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:10,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 01:00:10,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 01:00:10,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:12,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:12,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:12,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:13,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:13,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:13,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:13,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:13,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:13,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 01:00:13,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048550286] [2020-07-21 01:00:13,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:13,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 01:00:13,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653459529] [2020-07-21 01:00:13,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 01:00:13,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:13,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 01:00:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 01:00:13,408 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-21 01:00:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:13,648 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-21 01:00:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 01:00:13,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-21 01:00:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:13,653 INFO L225 Difference]: With dead ends: 43 [2020-07-21 01:00:13,654 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 01:00:13,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 01:00:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 01:00:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 01:00:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 01:00:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 01:00:13,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-21 01:00:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:13,663 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 01:00:13,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 01:00:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 01:00:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 01:00:13,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:13,665 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:13,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:13,869 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-21 01:00:13,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:13,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690971564] [2020-07-21 01:00:13,871 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 [2020-07-21 01:00:13,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:00:13,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:13,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 01:00:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-21 01:00:14,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:16,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:16,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:16,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:17,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:17,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:17,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:17,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:18,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:18,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:18,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:18,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:18,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:18,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:18,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 01:00:18,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690971564] [2020-07-21 01:00:18,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:18,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 01:00:18,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601083267] [2020-07-21 01:00:18,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 01:00:18,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:18,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 01:00:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 01:00:18,339 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-21 01:00:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:18,534 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-21 01:00:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:00:18,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-21 01:00:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:18,537 INFO L225 Difference]: With dead ends: 46 [2020-07-21 01:00:18,537 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 01:00:18,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 01:00:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 01:00:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 01:00:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 01:00:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-21 01:00:18,546 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-21 01:00:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:18,546 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-21 01:00:18,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 01:00:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-21 01:00:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 01:00:18,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:18,548 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:18,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:18,763 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:18,764 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-21 01:00:18,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:18,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822761028] [2020-07-21 01:00:18,766 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 [2020-07-21 01:00:18,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:00:18,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:18,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 01:00:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-21 01:00:19,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:21,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:21,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:22,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:23,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:23,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-21 01:00:24,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822761028] [2020-07-21 01:00:24,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:24,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 01:00:24,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129002048] [2020-07-21 01:00:24,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 01:00:24,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:24,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 01:00:24,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 01:00:24,905 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-21 01:00:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:25,131 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-21 01:00:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 01:00:25,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-21 01:00:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:25,133 INFO L225 Difference]: With dead ends: 49 [2020-07-21 01:00:25,133 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 01:00:25,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 01:00:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 01:00:25,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-21 01:00:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 01:00:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-21 01:00:25,141 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-21 01:00:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:25,142 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-21 01:00:25,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 01:00:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-21 01:00:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 01:00:25,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:25,144 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:25,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:25,349 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-21 01:00:25,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:25,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445367720] [2020-07-21 01:00:25,351 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 [2020-07-21 01:00:25,544 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:00:25,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:25,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-21 01:00:25,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-21 01:00:26,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:27,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:28,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:28,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:29,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:29,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,806 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 01:00:30,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:30,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:30,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:00:30,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-21 01:00:30,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445367720] [2020-07-21 01:00:30,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:30,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 34 [2020-07-21 01:00:30,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40610043] [2020-07-21 01:00:30,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 01:00:30,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:30,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 01:00:30,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1046, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 01:00:30,993 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 34 states. [2020-07-21 01:00:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:32,640 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-21 01:00:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 01:00:32,641 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-07-21 01:00:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:32,643 INFO L225 Difference]: With dead ends: 52 [2020-07-21 01:00:32,643 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 01:00:32,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=270, Invalid=2810, Unknown=0, NotChecked=0, Total=3080 [2020-07-21 01:00:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 01:00:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-21 01:00:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 01:00:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-21 01:00:32,652 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-21 01:00:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:32,652 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-21 01:00:32,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 01:00:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-21 01:00:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 01:00:32,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:32,654 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:32,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:32,857 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-21 01:00:32,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:32,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76681200] [2020-07-21 01:00:32,859 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:33,069 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:00:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:33,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 01:00:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 21 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-07-21 01:00:33,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:37,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:38,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:38,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:39,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:39,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:40,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:40,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:40,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:40,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:00:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 01:00:41,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76681200] [2020-07-21 01:00:41,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:41,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 26 [2020-07-21 01:00:41,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423869862] [2020-07-21 01:00:41,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 01:00:41,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 01:00:41,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-07-21 01:00:41,956 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-07-21 01:00:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:42,262 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-07-21 01:00:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 01:00:42,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-07-21 01:00:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:42,267 INFO L225 Difference]: With dead ends: 48 [2020-07-21 01:00:42,267 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:00:42,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 23 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 01:00:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:00:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:00:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:00:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:00:42,273 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-07-21 01:00:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:42,274 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:00:42,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 01:00:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:00:42,274 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:00:42,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:42,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:00:42,608 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:00:42,608 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:00:42,608 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:00:42,608 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:00:42,609 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:00:42,609 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:00:42,609 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-21 01:00:42,609 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2020-07-21 01:00:42,611 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-21 01:00:42,611 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-21 01:00:42,611 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-21 01:00:42,611 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-21 01:00:42,612 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 01:00:42,612 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-21 01:00:42,612 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-21 01:00:42,612 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-21 01:00:42,612 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 01:00:42,612 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 10 main_~a~0) [2020-07-21 01:00:42,612 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-21 01:00:42,613 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-21 01:00:42,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:00:42 BoogieIcfgContainer [2020-07-21 01:00:42,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:00:42,634 INFO L168 Benchmark]: Toolchain (without parser) took 42727.12 ms. Allocated memory was 135.8 MB in the beginning and 558.9 MB in the end (delta: 423.1 MB). Free memory was 99.9 MB in the beginning and 219.6 MB in the end (delta: -119.7 MB). Peak memory consumption was 303.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:00:42,635 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 135.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 01:00:42,637 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.83 ms. Allocated memory is still 135.8 MB. Free memory was 99.5 MB in the beginning and 90.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:00:42,642 INFO L168 Benchmark]: Boogie Preprocessor took 29.23 ms. Allocated memory is still 135.8 MB. Free memory was 90.3 MB in the beginning and 89.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:00:42,647 INFO L168 Benchmark]: RCFGBuilder took 394.10 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 89.0 MB in the beginning and 167.5 MB in the end (delta: -78.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:00:42,648 INFO L168 Benchmark]: TraceAbstraction took 42033.88 ms. Allocated memory was 199.8 MB in the beginning and 558.9 MB in the end (delta: 359.1 MB). Free memory was 166.8 MB in the beginning and 219.6 MB in the end (delta: -52.8 MB). Peak memory consumption was 306.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:00:42,655 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 135.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.83 ms. Allocated memory is still 135.8 MB. Free memory was 99.5 MB in the beginning and 90.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.23 ms. Allocated memory is still 135.8 MB. Free memory was 90.3 MB in the beginning and 89.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.10 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 89.0 MB in the beginning and 167.5 MB in the end (delta: -78.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 42033.88 ms. Allocated memory was 199.8 MB in the beginning and 558.9 MB in the end (delta: 359.1 MB). Free memory was 166.8 MB in the beginning and 219.6 MB in the end (delta: -52.8 MB). Peak memory consumption was 306.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 41.8s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 174 SDtfs, 588 SDslu, 1275 SDs, 0 SdLazy, 1311 SolverSat, 275 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1178 GetRequests, 753 SyntacticMatches, 144 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 21 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 34.2s InterpolantComputationTime, 552 NumberOfCodeBlocks, 378 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1068 ConstructedInterpolants, 0 QuantifiedInterpolants, 212976 SizeOfPredicates, 95 NumberOfNonLiveVariables, 1236 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 23 InterpolantComputations, 1 PerfectInterpolantSequences, 1512/3168 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...