/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/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:41:43,260 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 22:41:43,393 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 22:41:43,412 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:41:43,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:41:43,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:41:43,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:41:43,415 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:41:43,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:41:43,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:41:43,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:41:43,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:41:43,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:41:43,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:41:43,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:41:43,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:41:43,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:41:43,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:41:43,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:41:43,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:41:43,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:41:43,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:41:43,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:41:43,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:41:43,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:41:43,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:41:43,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:41:43,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:41:43,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:41:43,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:43,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:41:43,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:41:43,420 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 22:41:43,903 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:41:43,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:41:43,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:41:43,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:41:43,949 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:41:43,950 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2020-07-21 22:41:44,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5333495e5/9046de1ecbbf4739ac07e23f8a899418/FLAG9decc7448 [2020-07-21 22:41:44,762 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:41:44,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c [2020-07-21 22:41:44,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5333495e5/9046de1ecbbf4739ac07e23f8a899418/FLAG9decc7448 [2020-07-21 22:41:45,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5333495e5/9046de1ecbbf4739ac07e23f8a899418 [2020-07-21 22:41:45,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:41:45,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:41:45,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:41:45,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:41:45,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:41:45,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21bc1a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45, skipping insertion in model container [2020-07-21 22:41:45,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:41:45,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:41:45,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:41:45,353 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:41:45,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:41:45,409 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:41:45,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45 WrapperNode [2020-07-21 22:41:45,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:41:45,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:41:45,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:41:45,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:41:45,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (1/1) ... [2020-07-21 22:41:45,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:41:45,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:41:45,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:41:45,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:41:45,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (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 22:41:45,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:41:45,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:41:45,682 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-21 22:41:45,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:41:45,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:41:45,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:41:45,683 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 22:41:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:41:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:41:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 22:41:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:41:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:41:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:41:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:41:46,046 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:41:46,046 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 22:41:46,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:46 BoogieIcfgContainer [2020-07-21 22:41:46,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:41:46,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:41:46,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:41:46,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:41:46,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:41:45" (1/3) ... [2020-07-21 22:41:46,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498765c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:46, skipping insertion in model container [2020-07-21 22:41:46,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:45" (2/3) ... [2020-07-21 22:41:46,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498765c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:46, skipping insertion in model container [2020-07-21 22:41:46,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:46" (3/3) ... [2020-07-21 22:41:46,085 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-1.c [2020-07-21 22:41:46,128 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:41:46,156 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:41:46,177 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:41:46,216 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:41:46,217 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:41:46,217 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:41:46,218 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:41:46,218 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:41:46,218 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:41:46,218 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:41:46,218 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:41:46,250 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 22:41:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 22:41:46,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:46,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:46,261 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash 149844724, now seen corresponding path program 1 times [2020-07-21 22:41:46,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:46,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247275424] [2020-07-21 22:41:46,283 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 22:41:46,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:41:46,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 22:41:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:46,466 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 22:41:46,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:41:46,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247275424] [2020-07-21 22:41:46,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:41:46,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 22:41:46,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901804215] [2020-07-21 22:41:46,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 22:41:46,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:46,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 22:41:46,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:41:46,509 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-21 22:41:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:46,548 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-07-21 22:41:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 22:41:46,550 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-21 22:41:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:46,567 INFO L225 Difference]: With dead ends: 35 [2020-07-21 22:41:46,568 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 22:41:46,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:41:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 22:41:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 22:41:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 22:41:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 22:41:46,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-07-21 22:41:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:46,648 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 22:41:46,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 22:41:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 22:41:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 22:41:46,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:46,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:46,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:46,866 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1249419983, now seen corresponding path program 1 times [2020-07-21 22:41:46,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:46,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38590780] [2020-07-21 22:41:46,877 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 22:41:47,006 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:41:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:47,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:41:47,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:47,151 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-07-21 22:41:47,152 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:47,194 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:47,200 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:41:47,201 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:52 [2020-07-21 22:41:47,262 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 22:41:47,269 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:47,271 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21 [2020-07-21 22:41:47,276 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:47,294 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:47,298 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 22:41:47,300 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2020-07-21 22:41:47,354 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 22:41:47,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:41:47,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38590780] [2020-07-21 22:41:47,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:41:47,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:41:47,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794592961] [2020-07-21 22:41:47,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:41:47,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:41:47,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:41:47,362 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states. [2020-07-21 22:41:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:47,515 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-21 22:41:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:41:47,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 22:41:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:47,522 INFO L225 Difference]: With dead ends: 27 [2020-07-21 22:41:47,522 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 22:41:47,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:41:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 22:41:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 22:41:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 22:41:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-21 22:41:47,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-21 22:41:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:47,555 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-21 22:41:47,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:41:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-21 22:41:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 22:41:47,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:47,558 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:47,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:47,775 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:47,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1840889772, now seen corresponding path program 1 times [2020-07-21 22:41:47,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:47,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40091921] [2020-07-21 22:41:47,778 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 22:41:47,846 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:41:47,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:47,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:41:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:47,923 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-07-21 22:41:47,924 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:47,950 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:47,955 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:41:47,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:52 [2020-07-21 22:41:48,085 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 22:41:48,089 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:48,091 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21 [2020-07-21 22:41:48,095 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:48,117 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:48,120 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 22:41:48,121 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2020-07-21 22:41:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:48,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:41:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:48,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40091921] [2020-07-21 22:41:48,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:41:48,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 22:41:48,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46292961] [2020-07-21 22:41:48,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:41:48,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:41:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:41:48,303 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-07-21 22:41:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:48,572 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-21 22:41:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:41:48,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-21 22:41:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:48,575 INFO L225 Difference]: With dead ends: 33 [2020-07-21 22:41:48,577 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 22:41:48,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:41:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 22:41:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 22:41:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 22:41:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-07-21 22:41:48,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18 [2020-07-21 22:41:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:48,598 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-07-21 22:41:48,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:41:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-07-21 22:41:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:41:48,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:48,600 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:48,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:48,806 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:48,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1976792733, now seen corresponding path program 2 times [2020-07-21 22:41:48,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:48,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367938720] [2020-07-21 22:41:48,809 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 22:41:48,870 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:41:48,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:48,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:41:48,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:48,908 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-07-21 22:41:48,909 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:48,933 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:48,935 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:41:48,935 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:52 [2020-07-21 22:41:49,136 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 22:41:49,142 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:49,143 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21 [2020-07-21 22:41:49,146 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:49,158 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:49,161 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 22:41:49,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2020-07-21 22:41:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:49,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:41:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:41:49,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367938720] [2020-07-21 22:41:49,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:41:49,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 22:41:49,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442810705] [2020-07-21 22:41:49,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:41:49,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:49,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:41:49,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:41:49,544 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 14 states. [2020-07-21 22:41:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:50,264 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 22:41:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 22:41:50,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-07-21 22:41:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:50,268 INFO L225 Difference]: With dead ends: 45 [2020-07-21 22:41:50,268 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:41:50,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:41:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:41:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-21 22:41:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 22:41:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-07-21 22:41:50,282 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 24 [2020-07-21 22:41:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:50,282 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-07-21 22:41:50,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:41:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-07-21 22:41:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 22:41:50,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:50,285 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:50,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:50,490 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash 480004671, now seen corresponding path program 3 times [2020-07-21 22:41:50,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:50,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112579065] [2020-07-21 22:41:50,492 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 22:41:50,594 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:41:50,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 22:41:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:50,622 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2020-07-21 22:41:50,623 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:50,635 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:50,637 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:41:50,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-07-21 22:41:52,899 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#ad1~0.base_BEFORE_CALL_1| Int) (|v_main_~#ad1~0.offset_BEFORE_CALL_1| Int) (main_~pa~0.offset Int)) (and (= 0 (mod (+ (* |v_main_~#ad1~0.offset_BEFORE_CALL_1| 7) main_~pa~0.offset) 8)) (let ((.cse0 (div (+ (* |v_main_~#ad1~0.offset_BEFORE_CALL_1| (- 1)) main_~pa~0.offset) 8))) (= .cse0 (select (select |c_#memory_int| |v_main_~#ad1~0.base_BEFORE_CALL_1|) (+ |v_main_~#ad1~0.offset_BEFORE_CALL_1| (* .cse0 8))))))) is different from true [2020-07-21 22:42:03,160 WARN L193 SmtUtils]: Spent 10.17 s on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2020-07-21 22:42:03,188 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:42:03,198 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:42:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-21 22:42:03,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:42:03,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:42:03,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:42:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-21 22:42:03,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112579065] [2020-07-21 22:42:03,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:42:03,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-07-21 22:42:03,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548121568] [2020-07-21 22:42:03,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:42:03,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:42:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:42:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=169, Unknown=1, NotChecked=26, Total=240 [2020-07-21 22:42:03,925 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-07-21 22:42:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:42:04,522 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-21 22:42:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:42:04,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-07-21 22:42:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:42:04,525 INFO L225 Difference]: With dead ends: 37 [2020-07-21 22:42:04,525 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:42:04,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=74, Invalid=235, Unknown=1, NotChecked=32, Total=342 [2020-07-21 22:42:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:42:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:42:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:42:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:42:04,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-07-21 22:42:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:42:04,529 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:42:04,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:42:04,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:42:04,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:42:04,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:42:04,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:42:07,009 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 1 [2020-07-21 22:42:07,016 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:42:07,017 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:42:07,017 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:42:07,017 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:42:07,017 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:42:07,017 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:42:07,017 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:42:07,018 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-07-21 22:42:07,018 INFO L268 CegarLoopResult]: For program point L29-1(lines 29 31) no Hoare annotation was computed. [2020-07-21 22:42:07,018 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 38) no Hoare annotation was computed. [2020-07-21 22:42:07,018 INFO L268 CegarLoopResult]: For program point L21(lines 21 32) no Hoare annotation was computed. [2020-07-21 22:42:07,018 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 32) no Hoare annotation was computed. [2020-07-21 22:42:07,018 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 38) no Hoare annotation was computed. [2020-07-21 22:42:07,019 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed. [2020-07-21 22:42:07,019 INFO L264 CegarLoopResult]: At program point L30(lines 15 38) the Hoare annotation is: false [2020-07-21 22:42:07,019 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 38) the Hoare annotation is: true [2020-07-21 22:42:07,020 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 28) no Hoare annotation was computed. [2020-07-21 22:42:07,020 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 28) the Hoare annotation is: (and (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (let ((.cse0 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* .cse0 8) |main_~#ad1~0.offset|)) .cse0)) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (= main_~pa~0.base |main_~#ad1~0.base|)) [2020-07-21 22:42:07,021 INFO L264 CegarLoopResult]: At program point L26-4(lines 26 28) the Hoare annotation is: (and (let ((.cse0 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* .cse0 8) |main_~#ad1~0.offset|)) .cse0)) (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (= main_~pa~0.base |main_~#ad1~0.base|) (exists ((main_~pa~0.offset Int)) (let ((.cse1 (select |#memory_int| |main_~#ad1~0.base|))) (let ((.cse3 (select .cse1 main_~pa~0.offset))) (and (let ((.cse2 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select .cse1 (+ (* .cse2 8) |main_~#ad1~0.offset|)) .cse2)) (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (<= main_~i~0 .cse3) (<= .cse3 main_~i~0)))))) [2020-07-21 22:42:07,021 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 9 12) the Hoare annotation is: true [2020-07-21 22:42:07,021 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 9 12) no Hoare annotation was computed. [2020-07-21 22:42:07,021 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 9 12) no Hoare annotation was computed. [2020-07-21 22:42:07,040 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:42:07,043 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:42:07,053 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:42:07,053 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:42:07,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:42:07 BoogieIcfgContainer [2020-07-21 22:42:07,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:42:07,062 INFO L168 Benchmark]: Toolchain (without parser) took 22005.42 ms. Allocated memory was 137.4 MB in the beginning and 249.0 MB in the end (delta: 111.7 MB). Free memory was 102.5 MB in the beginning and 128.1 MB in the end (delta: -25.6 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:07,063 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 22:42:07,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.65 ms. Allocated memory is still 137.4 MB. Free memory was 102.1 MB in the beginning and 91.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:07,065 INFO L168 Benchmark]: Boogie Preprocessor took 186.01 ms. Allocated memory was 137.4 MB in the beginning and 202.9 MB in the end (delta: 65.5 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:07,066 INFO L168 Benchmark]: RCFGBuilder took 454.88 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 165.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:07,067 INFO L168 Benchmark]: TraceAbstraction took 21003.35 ms. Allocated memory was 202.9 MB in the beginning and 249.0 MB in the end (delta: 46.1 MB). Free memory was 165.8 MB in the beginning and 128.1 MB in the end (delta: 37.7 MB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:07,072 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 347.65 ms. Allocated memory is still 137.4 MB. Free memory was 102.1 MB in the beginning and 91.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 186.01 ms. Allocated memory was 137.4 MB in the beginning and 202.9 MB in the end (delta: 65.5 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 454.88 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 165.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21003.35 ms. Allocated memory was 202.9 MB in the beginning and 249.0 MB in the end (delta: 46.1 MB). Free memory was 165.8 MB in the beginning and 128.1 MB in the end (delta: 37.7 MB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant [2020-07-21 22:42:07,083 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:42:07,083 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:42:07,084 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:42:07,085 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((0 == (pa + ad1 * 7) % 8 && unknown-#memory_int-unknown[ad1][(pa + ad1 * -1) / 8 * 8 + ad1] == (pa + ad1 * -1) / 8) && i <= unknown-#memory_int-unknown[pa][pa]) && pa == ad1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.5s, OverallIterations: 5, TraceHistogramMax: 11, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 21 SDslu, 153 SDs, 0 SdLazy, 114 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 14.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 12 PreInvPairs, 23 NumberOfFragments, 140 HoareAnnotationTreeSize, 12 FomulaSimplifications, 744 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 70 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 14.8s InterpolantComputationTime, 109 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 179 ConstructedInterpolants, 41 QuantifiedInterpolants, 77682 SizeOfPredicates, 46 NumberOfNonLiveVariables, 421 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 181/264 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...