/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:29:05,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:29:05,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:29:05,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:29:05,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:29:05,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:29:05,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:29:05,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:29:05,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:29:05,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:29:05,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:29:05,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:29:05,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:29:05,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:29:05,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:29:06,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:29:06,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:29:06,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:29:06,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:29:06,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:29:06,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:29:06,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:29:06,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:29:06,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:29:06,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:29:06,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:29:06,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:29:06,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:29:06,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:29:06,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:29:06,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:29:06,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:29:06,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:29:06,087 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:29:06,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:29:06,090 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:29:06,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:29:06,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:29:06,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:29:06,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:29:06,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:29:06,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:29:06,091 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:29:06,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:29:06,091 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:29:06,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:29:06,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:29:06,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:29:06,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:29:06,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:29:06,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:29:06,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:29:06,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:29:06,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:29:06,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:29:06,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:06,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:29:06,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:29:06,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:29:06,383 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:29:06,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:29:06,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:29:06,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:29:06,414 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:29:06,416 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-20 22:29:06,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc8cfeeaf/a0005aaf3a304510bdd8bfbf5616d878/FLAGf4ecf4e3d [2020-07-20 22:29:07,002 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:29:07,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-20 22:29:07,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc8cfeeaf/a0005aaf3a304510bdd8bfbf5616d878/FLAGf4ecf4e3d [2020-07-20 22:29:07,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc8cfeeaf/a0005aaf3a304510bdd8bfbf5616d878 [2020-07-20 22:29:07,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:29:07,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:29:07,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:29:07,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:29:07,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:29:07,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755de7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07, skipping insertion in model container [2020-07-20 22:29:07,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:29:07,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:29:07,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:29:07,677 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:29:07,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:29:07,719 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:29:07,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07 WrapperNode [2020-07-20 22:29:07,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:29:07,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:29:07,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:29:07,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:29:07,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (1/1) ... [2020-07-20 22:29:07,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:29:07,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:29:07,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:29:07,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:29:07,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:29:08,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:29:08,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:29:08,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:29:08,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:29:08,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:29:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:29:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:29:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:29:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:29:08,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:29:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:29:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:29:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:29:08,290 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:29:08,291 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 22:29:08,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:29:08 BoogieIcfgContainer [2020-07-20 22:29:08,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:29:08,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:29:08,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:29:08,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:29:08,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:29:07" (1/3) ... [2020-07-20 22:29:08,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c29f9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:29:08, skipping insertion in model container [2020-07-20 22:29:08,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:07" (2/3) ... [2020-07-20 22:29:08,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c29f9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:29:08, skipping insertion in model container [2020-07-20 22:29:08,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:29:08" (3/3) ... [2020-07-20 22:29:08,321 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-07-20 22:29:08,352 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:29:08,365 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:29:08,383 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:29:08,411 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:29:08,411 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:29:08,411 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:29:08,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:29:08,412 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:29:08,412 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:29:08,412 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:29:08,412 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:29:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 22:29:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 22:29:08,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:08,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:08,443 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:08,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-07-20 22:29:08,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:08,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191546373] [2020-07-20 22:29:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:08,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:08,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:08,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:29:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:08,612 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:29:08,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:08,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191546373] [2020-07-20 22:29:08,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:08,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:29:08,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369818602] [2020-07-20 22:29:08,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:29:08,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:08,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:29:08,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:29:08,672 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-20 22:29:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:08,784 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-07-20 22:29:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:29:08,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 22:29:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:08,795 INFO L225 Difference]: With dead ends: 57 [2020-07-20 22:29:08,795 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 22:29:08,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:08,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 22:29:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 22:29:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:29:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 22:29:08,849 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-20 22:29:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:08,850 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 22:29:08,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:29:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 22:29:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 22:29:08,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:08,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:09,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:09,069 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:09,070 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-07-20 22:29:09,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:09,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25361753] [2020-07-20 22:29:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:09,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:29:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:09,141 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:29:09,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:09,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25361753] [2020-07-20 22:29:09,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:09,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:29:09,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183419655] [2020-07-20 22:29:09,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:29:09,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:29:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:09,178 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-20 22:29:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:09,325 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 22:29:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:29:09,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 22:29:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:09,327 INFO L225 Difference]: With dead ends: 40 [2020-07-20 22:29:09,328 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 22:29:09,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:29:09,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 22:29:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-20 22:29:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 22:29:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 22:29:09,339 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-07-20 22:29:09,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:09,339 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 22:29:09,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:29:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 22:29:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 22:29:09,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:09,341 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:09,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:09,557 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:09,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-07-20 22:29:09,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:09,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923229084] [2020-07-20 22:29:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:09,600 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:09,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:29:09,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:09,625 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:29:09,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:09,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923229084] [2020-07-20 22:29:09,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:09,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:29:09,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417964741] [2020-07-20 22:29:09,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:29:09,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:29:09,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:29:09,659 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-07-20 22:29:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:09,760 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-07-20 22:29:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:29:09,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 22:29:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:09,762 INFO L225 Difference]: With dead ends: 45 [2020-07-20 22:29:09,762 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 22:29:09,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 22:29:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 22:29:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 22:29:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 22:29:09,793 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-07-20 22:29:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:09,794 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 22:29:09,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:29:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 22:29:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 22:29:09,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:09,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:10,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,013 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:10,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-07-20 22:29:10,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:10,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317494904] [2020-07-20 22:29:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:10,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:10,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:29:10,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 22:29:10,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:10,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317494904] [2020-07-20 22:29:10,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:10,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:29:10,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725378183] [2020-07-20 22:29:10,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:29:10,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:29:10,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:29:10,100 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-07-20 22:29:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:10,179 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-07-20 22:29:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:29:10,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 22:29:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:10,183 INFO L225 Difference]: With dead ends: 68 [2020-07-20 22:29:10,183 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 22:29:10,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:29:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 22:29:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 22:29:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 22:29:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-20 22:29:10,211 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 24 [2020-07-20 22:29:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:10,211 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-20 22:29:10,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:29:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-20 22:29:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 22:29:10,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:10,217 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:10,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,433 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-07-20 22:29:10,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:10,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112689584] [2020-07-20 22:29:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:10,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:29:10,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 22:29:10,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:29:10,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112689584] [2020-07-20 22:29:10,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:10,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-20 22:29:10,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015797641] [2020-07-20 22:29:10,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:29:10,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:10,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:29:10,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:10,554 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-07-20 22:29:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:10,643 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-07-20 22:29:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:29:10,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-07-20 22:29:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:10,645 INFO L225 Difference]: With dead ends: 79 [2020-07-20 22:29:10,645 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 22:29:10,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:29:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 22:29:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-07-20 22:29:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 22:29:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-20 22:29:10,659 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2020-07-20 22:29:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:10,659 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-20 22:29:10,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:29:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-20 22:29:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 22:29:10,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:10,661 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:10,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,872 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-07-20 22:29:10,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:10,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461065808] [2020-07-20 22:29:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,904 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:10,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:29:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 22:29:11,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:19,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461065808] [2020-07-20 22:29:19,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 22:29:19,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 22:29:19,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206614204] [2020-07-20 22:29:19,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:29:19,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:19,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:29:19,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=116, Unknown=4, NotChecked=0, Total=156 [2020-07-20 22:29:19,297 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2020-07-20 22:29:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:19,714 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2020-07-20 22:29:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 22:29:19,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-20 22:29:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:19,717 INFO L225 Difference]: With dead ends: 126 [2020-07-20 22:29:19,718 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 22:29:19,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=124, Invalid=334, Unknown=4, NotChecked=0, Total=462 [2020-07-20 22:29:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 22:29:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-07-20 22:29:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 22:29:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-07-20 22:29:19,732 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 34 [2020-07-20 22:29:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:19,732 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-07-20 22:29:19,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:29:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-07-20 22:29:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 22:29:19,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:19,734 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:19,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:19,944 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-07-20 22:29:19,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:19,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750045455] [2020-07-20 22:29:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:19,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:19,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:19,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:29:19,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:20,039 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 22:29:20,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:20,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 22:29:20,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750045455] [2020-07-20 22:29:20,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:20,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-07-20 22:29:20,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484625046] [2020-07-20 22:29:20,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:29:20,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:29:20,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:29:20,172 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 8 states. [2020-07-20 22:29:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:20,467 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-07-20 22:29:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 22:29:20,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-20 22:29:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:20,470 INFO L225 Difference]: With dead ends: 93 [2020-07-20 22:29:20,471 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 22:29:20,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:29:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 22:29:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2020-07-20 22:29:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 22:29:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2020-07-20 22:29:20,485 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2020-07-20 22:29:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:20,486 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2020-07-20 22:29:20,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:29:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2020-07-20 22:29:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 22:29:20,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:20,488 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:20,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:20,702 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:20,702 INFO L82 PathProgramCache]: Analyzing trace with hash -283813380, now seen corresponding path program 2 times [2020-07-20 22:29:20,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:20,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290261087] [2020-07-20 22:29:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:20,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:20,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:20,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:29:20,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 22:29:20,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 22:29:20,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290261087] [2020-07-20 22:29:20,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:20,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 22:29:20,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567741620] [2020-07-20 22:29:20,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 22:29:20,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 22:29:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:29:20,947 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 10 states. [2020-07-20 22:29:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:21,437 INFO L93 Difference]: Finished difference Result 162 states and 214 transitions. [2020-07-20 22:29:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 22:29:21,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-07-20 22:29:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:21,447 INFO L225 Difference]: With dead ends: 162 [2020-07-20 22:29:21,447 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 22:29:21,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 22:29:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 22:29:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2020-07-20 22:29:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 22:29:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 112 transitions. [2020-07-20 22:29:21,484 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 112 transitions. Word has length 41 [2020-07-20 22:29:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:21,489 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 112 transitions. [2020-07-20 22:29:21,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 22:29:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 112 transitions. [2020-07-20 22:29:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 22:29:21,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:21,491 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:21,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:21,692 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:21,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:21,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1662503488, now seen corresponding path program 3 times [2020-07-20 22:29:21,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:21,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416271883] [2020-07-20 22:29:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:21,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:21,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:29:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:21,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 22:29:21,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:21,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416271883] [2020-07-20 22:29:21,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:21,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:29:21,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616396158] [2020-07-20 22:29:21,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:29:21,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:29:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:21,794 INFO L87 Difference]: Start difference. First operand 85 states and 112 transitions. Second operand 6 states. [2020-07-20 22:29:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:21,888 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2020-07-20 22:29:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:29:21,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-07-20 22:29:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:21,891 INFO L225 Difference]: With dead ends: 85 [2020-07-20 22:29:21,891 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:29:21,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:29:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:29:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:29:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:29:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:29:21,898 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2020-07-20 22:29:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:21,898 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:29:21,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:29:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:29:21,899 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:29:22,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:22,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:29:22,884 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-20 22:29:23,014 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-07-20 22:29:23,020 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:29:23,020 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:29:23,020 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:29:23,020 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:29:23,020 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:29:23,021 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:29:23,021 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:29:23,021 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 22:29:23,021 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:29:23,021 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:29:23,021 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-07-20 22:29:23,021 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-07-20 22:29:23,021 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= .cse2 main_~j~0))) (or (and (<= main_~k~0 main_~n~0) .cse0 .cse1) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) (div main_~j~0 2)) (<= main_~j~0 .cse2) .cse0 .cse1) (and (<= main_~k~0 (+ .cse2 2)) (<= main_~k~0 main_~j~0) .cse0 .cse1)))) [2020-07-20 22:29:23,022 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-07-20 22:29:23,022 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0) (<= .cse0 main_~j~0))) [2020-07-20 22:29:23,022 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 22:29:23,022 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-07-20 22:29:23,022 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-20 22:29:23,022 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-07-20 22:29:23,022 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-20 22:29:23,022 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= (+ main_~k~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= .cse0 main_~j~0))) [2020-07-20 22:29:23,022 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-07-20 22:29:23,022 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-07-20 22:29:23,023 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse1 (* 2 main_~i~0)) (.cse0 (<= main_~n~0 main_~k~0)) (.cse2 (<= main_~n~0 main_~j~0))) (or (and (<= main_~k~0 main_~n~0) .cse0) (and (<= main_~k~0 .cse1) .cse0 .cse2) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) main_~i~0) (<= main_~j~0 .cse1) .cse0 .cse2))) [2020-07-20 22:29:23,023 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-07-20 22:29:23,023 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-07-20 22:29:23,023 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-07-20 22:29:23,023 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 22:29:23,023 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:29:23,023 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 22:29:23,023 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 22:29:23,023 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:29:23,024 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 22:29:23,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:29:23 BoogieIcfgContainer [2020-07-20 22:29:23,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:29:23,049 INFO L168 Benchmark]: Toolchain (without parser) took 15672.70 ms. Allocated memory was 138.9 MB in the beginning and 243.3 MB in the end (delta: 104.3 MB). Free memory was 102.1 MB in the beginning and 125.3 MB in the end (delta: -23.3 MB). Peak memory consumption was 81.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:29:23,049 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 138.9 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 22:29:23,050 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.62 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:29:23,051 INFO L168 Benchmark]: Boogie Preprocessor took 39.03 ms. Allocated memory is still 138.9 MB. Free memory was 92.2 MB in the beginning and 90.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:29:23,052 INFO L168 Benchmark]: RCFGBuilder took 537.19 ms. Allocated memory was 138.9 MB in the beginning and 207.6 MB in the end (delta: 68.7 MB). Free memory was 90.5 MB in the beginning and 172.5 MB in the end (delta: -82.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:29:23,053 INFO L168 Benchmark]: TraceAbstraction took 14747.14 ms. Allocated memory was 207.6 MB in the beginning and 243.3 MB in the end (delta: 35.7 MB). Free memory was 171.9 MB in the beginning and 125.3 MB in the end (delta: 46.6 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:29:23,057 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 138.9 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.62 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.03 ms. Allocated memory is still 138.9 MB. Free memory was 92.2 MB in the beginning and 90.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 537.19 ms. Allocated memory was 138.9 MB in the beginning and 207.6 MB in the end (delta: 68.7 MB). Free memory was 90.5 MB in the beginning and 172.5 MB in the end (delta: -82.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14747.14 ms. Allocated memory was 207.6 MB in the beginning and 243.3 MB in the end (delta: 35.7 MB). Free memory was 171.9 MB in the beginning and 125.3 MB in the end (delta: 46.6 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((j < n && 2 * i <= k) && k <= n) && 2 * i <= j - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((k <= n && n <= k) || ((k <= 2 * i && n <= k) && n <= j)) || ((((n * -1 + 1) / -2 + 1 <= i && j <= 2 * i) && n <= k) && n <= j) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((k <= n && n <= k) && 2 * i <= j) || ((((n * -1 + 1) / -2 + 1 <= j / 2 && j <= 2 * i) && n <= k) && 2 * i <= j)) || (((k <= 2 * i + 2 && k <= j) && n <= k) && 2 * i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.7s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 126 SDslu, 680 SDs, 0 SdLazy, 650 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 415 GetRequests, 325 SyntacticMatches, 15 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 50 PreInvPairs, 103 NumberOfFragments, 174 HoareAnnotationTreeSize, 50 FomulaSimplifications, 4900 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 12 FomulaSimplificationsInter, 989 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 264 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 362 ConstructedInterpolants, 0 QuantifiedInterpolants, 26310 SizeOfPredicates, 31 NumberOfNonLiveVariables, 462 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 162/194 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...