/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:47,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:47,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:47,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:47,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:47,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:47,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:47,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:47,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:47,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:47,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:47,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:47,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:47,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:47,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:47,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:47,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:47,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:47,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:47,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:47,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:47,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:47,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:47,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:47,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:47,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:47,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:47,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:47,160 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 11:47:47,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:47,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:47,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:47,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:47,177 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:47,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:47,177 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:47,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:47,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:47,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:47,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:47,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:47,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:47,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:47,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:47,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:47,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:47,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:47,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:47,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:47,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:47,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:47,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:47,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:47,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:47,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:47,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:47,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:47,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:47,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:47:47,484 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:47,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:47,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:47,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:47,504 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:47,505 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 11:47:47,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0bc4b00c/37a7f8d5700c4c988ea0fa5561dd8aee/FLAGe95a7b059 [2020-07-20 11:47:48,075 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:48,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 11:47:48,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0bc4b00c/37a7f8d5700c4c988ea0fa5561dd8aee/FLAGe95a7b059 [2020-07-20 11:47:48,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0bc4b00c/37a7f8d5700c4c988ea0fa5561dd8aee [2020-07-20 11:47:48,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:48,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:48,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:48,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:48,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:48,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f44038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48, skipping insertion in model container [2020-07-20 11:47:48,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:48,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:48,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:48,729 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:48,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:48,878 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:48,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48 WrapperNode [2020-07-20 11:47:48,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:48,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:48,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:48,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:48,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (1/1) ... [2020-07-20 11:47:48,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:48,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:48,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:48,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:48,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (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 11:47:49,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-20 11:47:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-20 11:47:49,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-20 11:47:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-20 11:47:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 11:47:49,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 11:47:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:49,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:49,508 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:49,508 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-20 11:47:49,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:49 BoogieIcfgContainer [2020-07-20 11:47:49,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:49,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:49,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:49,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:49,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:48" (1/3) ... [2020-07-20 11:47:49,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3324b3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:49, skipping insertion in model container [2020-07-20 11:47:49,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:48" (2/3) ... [2020-07-20 11:47:49,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3324b3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:49, skipping insertion in model container [2020-07-20 11:47:49,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:49" (3/3) ... [2020-07-20 11:47:49,523 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-20 11:47:49,534 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:49,543 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:49,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:49,585 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:49,585 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:49,585 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:49,586 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:49,586 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:49,586 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:49,586 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:49,587 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-20 11:47:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:47:49,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:49,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:49,618 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-20 11:47:49,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:49,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826499497] [2020-07-20 11:47:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:49,768 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 11:47:49,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:49,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826499497] [2020-07-20 11:47:49,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:49,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:49,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887793607] [2020-07-20 11:47:49,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:49,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:49,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:49,797 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2020-07-20 11:47:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:49,836 INFO L93 Difference]: Finished difference Result 122 states and 178 transitions. [2020-07-20 11:47:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:49,838 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-20 11:47:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:49,848 INFO L225 Difference]: With dead ends: 122 [2020-07-20 11:47:49,848 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 11:47:49,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 11:47:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 11:47:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 11:47:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-20 11:47:49,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-20 11:47:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:49,898 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-20 11:47:49,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-20 11:47:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:47:49,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:49,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:50,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:50,106 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-20 11:47:50,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:50,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057340416] [2020-07-20 11:47:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:50,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:50,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:50,213 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 11:47:50,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:50,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057340416] [2020-07-20 11:47:50,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:50,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:50,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289028456] [2020-07-20 11:47:50,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:50,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:50,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:50,222 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-07-20 11:47:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:50,266 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-07-20 11:47:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:50,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 11:47:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:50,268 INFO L225 Difference]: With dead ends: 38 [2020-07-20 11:47:50,268 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 11:47:50,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 11:47:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-07-20 11:47:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:47:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-20 11:47:50,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-20 11:47:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:50,277 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-20 11:47:50,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-20 11:47:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:47:50,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:50,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:50,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:50,494 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-20 11:47:50,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:50,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191085296] [2020-07-20 11:47:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:50,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:47:50,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:50,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:47:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:50,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191085296] [2020-07-20 11:47:50,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:47:50,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 11:47:50,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203401903] [2020-07-20 11:47:50,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:47:50,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:47:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:47:50,674 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-07-20 11:47:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:50,759 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-20 11:47:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:47:50,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-20 11:47:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:50,761 INFO L225 Difference]: With dead ends: 48 [2020-07-20 11:47:50,761 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:47:50,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:47:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:47:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 11:47:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:47:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-20 11:47:50,769 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-07-20 11:47:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:50,769 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-20 11:47:50,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:47:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-20 11:47:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:47:50,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:50,771 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:50,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:50,982 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:50,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1296658810, now seen corresponding path program 2 times [2020-07-20 11:47:50,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:50,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216167932] [2020-07-20 11:47:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:47:51,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:51,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:47:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:51,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216167932] [2020-07-20 11:47:51,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:47:51,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 11:47:51,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2568197] [2020-07-20 11:47:51,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:47:51,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:47:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:47:51,194 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-07-20 11:47:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:51,297 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-07-20 11:47:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:47:51,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-07-20 11:47:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:51,299 INFO L225 Difference]: With dead ends: 68 [2020-07-20 11:47:51,299 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 11:47:51,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:47:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 11:47:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 11:47:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:47:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-07-20 11:47:51,308 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2020-07-20 11:47:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:51,308 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-07-20 11:47:51,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:47:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-07-20 11:47:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 11:47:51,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:51,310 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:51,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:51,516 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1360264712, now seen corresponding path program 3 times [2020-07-20 11:47:51,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:51,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125131262] [2020-07-20 11:47:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:51,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:47:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 11:47:51,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:51,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125131262] [2020-07-20 11:47:51,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:51,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:51,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936777193] [2020-07-20 11:47:51,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:51,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:51,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:51,608 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 4 states. [2020-07-20 11:47:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:51,651 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2020-07-20 11:47:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:51,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-07-20 11:47:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:51,655 INFO L225 Difference]: With dead ends: 115 [2020-07-20 11:47:51,655 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 11:47:51,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 11:47:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2020-07-20 11:47:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 11:47:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-07-20 11:47:51,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 36 [2020-07-20 11:47:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:51,671 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-07-20 11:47:51,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-07-20 11:47:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 11:47:51,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:51,673 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:51,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:51,888 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash -850791622, now seen corresponding path program 1 times [2020-07-20 11:47:51,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:51,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227758044] [2020-07-20 11:47:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:47:51,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:51,972 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:47:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 11:47:51,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:51,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227758044] [2020-07-20 11:47:51,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:51,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:47:51,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965932900] [2020-07-20 11:47:51,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:47:51,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:51,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:47:51,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:47:51,993 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-07-20 11:47:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:52,057 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-07-20 11:47:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:47:52,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-20 11:47:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:52,059 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:47:52,060 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 11:47:52,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 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 11:47:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 11:47:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-07-20 11:47:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 11:47:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-20 11:47:52,073 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 36 [2020-07-20 11:47:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:52,073 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-20 11:47:52,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:47:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-20 11:47:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 11:47:52,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:52,076 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:52,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:52,291 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 1 times [2020-07-20 11:47:52,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:52,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631750659] [2020-07-20 11:47:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:47:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-20 11:47:52,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:47:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-20 11:47:52,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631750659] [2020-07-20 11:47:52,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:47:52,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 11:47:52,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628754630] [2020-07-20 11:47:52,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:47:52,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:47:52,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:47:52,492 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-20 11:47:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:52,604 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-07-20 11:47:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:47:52,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-20 11:47:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:52,612 INFO L225 Difference]: With dead ends: 168 [2020-07-20 11:47:52,612 INFO L226 Difference]: Without dead ends: 133 [2020-07-20 11:47:52,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:47:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-20 11:47:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-20 11:47:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 11:47:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-20 11:47:52,630 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-07-20 11:47:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:52,630 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-20 11:47:52,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:47:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-20 11:47:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 11:47:52,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:52,632 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:52,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:52,848 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 2 times [2020-07-20 11:47:52,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:52,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323213804] [2020-07-20 11:47:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:52,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:47:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:52,941 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:47:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 11:47:52,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:47:52,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:47:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 11:47:53,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323213804] [2020-07-20 11:47:53,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:47:53,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 11:47:53,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878800119] [2020-07-20 11:47:53,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:47:53,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:47:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:47:53,027 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 8 states. [2020-07-20 11:47:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:53,144 INFO L93 Difference]: Finished difference Result 167 states and 201 transitions. [2020-07-20 11:47:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:47:53,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-20 11:47:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:53,146 INFO L225 Difference]: With dead ends: 167 [2020-07-20 11:47:53,147 INFO L226 Difference]: Without dead ends: 165 [2020-07-20 11:47:53,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:47:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-20 11:47:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-07-20 11:47:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-20 11:47:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 197 transitions. [2020-07-20 11:47:53,165 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 197 transitions. Word has length 69 [2020-07-20 11:47:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:53,166 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 197 transitions. [2020-07-20 11:47:53,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:47:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 197 transitions. [2020-07-20 11:47:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-20 11:47:53,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:53,170 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:53,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:53,385 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:53,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash 419958136, now seen corresponding path program 3 times [2020-07-20 11:47:53,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:53,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916722256] [2020-07-20 11:47:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:47:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1019 proven. 297 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-07-20 11:47:53,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:47:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1007 proven. 297 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-20 11:47:53,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916722256] [2020-07-20 11:47:53,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:47:53,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-20 11:47:53,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227931986] [2020-07-20 11:47:53,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:47:53,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:53,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:47:53,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:47:53,700 INFO L87 Difference]: Start difference. First operand 163 states and 197 transitions. Second operand 11 states. [2020-07-20 11:47:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:53,902 INFO L93 Difference]: Finished difference Result 303 states and 358 transitions. [2020-07-20 11:47:53,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:47:53,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 168 [2020-07-20 11:47:53,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:53,906 INFO L225 Difference]: With dead ends: 303 [2020-07-20 11:47:53,907 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 11:47:53,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:47:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 11:47:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-07-20 11:47:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-20 11:47:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-07-20 11:47:53,926 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 168 [2020-07-20 11:47:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:53,927 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-07-20 11:47:53,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:47:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-07-20 11:47:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-20 11:47:53,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:53,930 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 27, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:54,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:54,144 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 4 times [2020-07-20 11:47:54,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:54,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190472453] [2020-07-20 11:47:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:54,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 11:47:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 838 proven. 768 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-20 11:47:54,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:47:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 828 proven. 768 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 11:47:54,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190472453] [2020-07-20 11:47:54,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:47:54,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-07-20 11:47:54,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921378500] [2020-07-20 11:47:54,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:47:54,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:54,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:47:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:47:54,484 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 14 states. [2020-07-20 11:47:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:54,858 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2020-07-20 11:47:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 11:47:54,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-20 11:47:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:54,865 INFO L225 Difference]: With dead ends: 268 [2020-07-20 11:47:54,865 INFO L226 Difference]: Without dead ends: 205 [2020-07-20 11:47:54,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:47:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-20 11:47:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2020-07-20 11:47:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-20 11:47:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2020-07-20 11:47:54,900 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 168 [2020-07-20 11:47:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:54,901 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2020-07-20 11:47:54,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:47:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2020-07-20 11:47:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-20 11:47:54,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:54,919 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 26, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:55,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:55,133 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:55,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1900915656, now seen corresponding path program 5 times [2020-07-20 11:47:55,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:55,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659863093] [2020-07-20 11:47:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 11:47:55,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-20 11:47:55,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:47:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-20 11:47:55,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659863093] [2020-07-20 11:47:55,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:47:55,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-07-20 11:47:55,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765412662] [2020-07-20 11:47:55,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:47:55,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:55,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:47:55,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:47:55,528 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand 17 states. [2020-07-20 11:47:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:56,144 INFO L93 Difference]: Finished difference Result 271 states and 313 transitions. [2020-07-20 11:47:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 11:47:56,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-07-20 11:47:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:56,152 INFO L225 Difference]: With dead ends: 271 [2020-07-20 11:47:56,152 INFO L226 Difference]: Without dead ends: 236 [2020-07-20 11:47:56,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:47:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-20 11:47:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2020-07-20 11:47:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 11:47:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 211 transitions. [2020-07-20 11:47:56,165 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 211 transitions. Word has length 168 [2020-07-20 11:47:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:56,166 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 211 transitions. [2020-07-20 11:47:56,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:47:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 211 transitions. [2020-07-20 11:47:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-20 11:47:56,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:56,170 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 25, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:56,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:56,385 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2135886202, now seen corresponding path program 6 times [2020-07-20 11:47:56,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:56,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923748176] [2020-07-20 11:47:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:56,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:47:56,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:56,527 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:47:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-20 11:47:56,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:47:56,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:47:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-20 11:47:56,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923748176] [2020-07-20 11:47:56,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:47:56,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 11:47:56,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556126306] [2020-07-20 11:47:56,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:47:56,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:47:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:47:56,693 INFO L87 Difference]: Start difference. First operand 184 states and 211 transitions. Second operand 14 states. [2020-07-20 11:47:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:56,889 INFO L93 Difference]: Finished difference Result 345 states and 414 transitions. [2020-07-20 11:47:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:47:56,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-20 11:47:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:56,892 INFO L225 Difference]: With dead ends: 345 [2020-07-20 11:47:56,892 INFO L226 Difference]: Without dead ends: 343 [2020-07-20 11:47:56,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:47:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-20 11:47:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2020-07-20 11:47:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-07-20 11:47:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 410 transitions. [2020-07-20 11:47:56,916 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 410 transitions. Word has length 168 [2020-07-20 11:47:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:56,917 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 410 transitions. [2020-07-20 11:47:56,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:47:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 410 transitions. [2020-07-20 11:47:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-20 11:47:56,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:56,924 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 61, 11, 11, 11, 11, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:57,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:57,139 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:57,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1434461414, now seen corresponding path program 7 times [2020-07-20 11:47:57,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:57,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061501731] [2020-07-20 11:47:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:47:57,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9761 backedges. 7345 proven. 0 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2020-07-20 11:47:57,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:57,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061501731] [2020-07-20 11:47:57,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:57,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 11:47:57,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617106249] [2020-07-20 11:47:57,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:47:57,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:47:57,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:47:57,518 INFO L87 Difference]: Start difference. First operand 341 states and 410 transitions. Second operand 9 states. [2020-07-20 11:47:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:57,648 INFO L93 Difference]: Finished difference Result 345 states and 413 transitions. [2020-07-20 11:47:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:47:57,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 366 [2020-07-20 11:47:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:57,650 INFO L225 Difference]: With dead ends: 345 [2020-07-20 11:47:57,650 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:47:57,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:47:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:47:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:47:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:47:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:47:57,653 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 366 [2020-07-20 11:47:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:57,653 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:47:57,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:47:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:47:57,654 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:47:57,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:57,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:47:58,131 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-20 11:47:58,277 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-07-20 11:47:58,488 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-07-20 11:47:58,488 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-07-20 11:47:58,489 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-07-20 11:47:58,489 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-07-20 11:47:58,489 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-07-20 11:47:58,489 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-07-20 11:47:58,489 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-07-20 11:47:58,489 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-07-20 11:47:58,489 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-07-20 11:47:58,489 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-07-20 11:47:58,489 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-07-20 11:47:58,490 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-07-20 11:47:58,490 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-07-20 11:47:58,490 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-07-20 11:47:58,490 INFO L271 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: true [2020-07-20 11:47:58,490 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-07-20 11:47:58,490 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-07-20 11:47:58,491 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-07-20 11:47:58,491 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-07-20 11:47:58,491 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-20 11:47:58,491 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-07-20 11:47:58,492 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-07-20 11:47:58,492 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-07-20 11:47:58,492 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-07-20 11:47:58,492 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-07-20 11:47:58,492 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-07-20 11:47:58,492 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-07-20 11:47:58,493 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-07-20 11:47:58,493 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-07-20 11:47:58,493 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-20 11:47:58,493 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-07-20 11:47:58,493 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-07-20 11:47:58,493 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-07-20 11:47:58,493 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:47:58,493 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:47:58,494 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:47:58,494 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-07-20 11:47:58,494 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-07-20 11:47:58,494 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-07-20 11:47:58,494 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-07-20 11:47:58,494 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-07-20 11:47:58,494 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:47:58,494 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:47:58,495 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:47:58,495 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:47:58,495 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-20 11:47:58,495 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-07-20 11:47:58,495 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-07-20 11:47:58,495 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-07-20 11:47:58,496 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 4 main_~i~0)) (and .cse0 .cse1 (= 0 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (< main_~i~0 47) (<= 6 main_~i~0)))) [2020-07-20 11:47:58,496 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-07-20 11:47:58,496 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-07-20 11:47:58,496 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 11:47:58,496 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-20 11:47:58,496 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: true [2020-07-20 11:47:58,496 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-07-20 11:47:58,497 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 0 main_~i~0)) (and .cse0 (<= main_~i~0 4) .cse1 (<= 4 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1))) [2020-07-20 11:47:58,497 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 0 main_~i~0)) (and .cse0 (<= main_~i~0 4) .cse1 (<= 4 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1))) [2020-07-20 11:47:58,497 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 11:47:58,497 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 11:47:58,497 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:47:58,498 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:47:58,498 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 11:47:58,498 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 11:47:58,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:58 BoogieIcfgContainer [2020-07-20 11:47:58,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:58,520 INFO L168 Benchmark]: Toolchain (without parser) took 10132.18 ms. Allocated memory was 136.8 MB in the beginning and 364.4 MB in the end (delta: 227.5 MB). Free memory was 101.6 MB in the beginning and 171.0 MB in the end (delta: -69.4 MB). Peak memory consumption was 158.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:58,521 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:58,522 INFO L168 Benchmark]: CACSL2BoogieTranslator took 487.39 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 101.4 MB in the beginning and 177.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:58,523 INFO L168 Benchmark]: Boogie Preprocessor took 63.36 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 175.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:58,523 INFO L168 Benchmark]: RCFGBuilder took 570.49 ms. Allocated memory is still 201.3 MB. Free memory was 175.9 MB in the beginning and 148.2 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:58,524 INFO L168 Benchmark]: TraceAbstraction took 9003.69 ms. Allocated memory was 201.3 MB in the beginning and 364.4 MB in the end (delta: 163.1 MB). Free memory was 147.5 MB in the beginning and 171.0 MB in the end (delta: -23.5 MB). Peak memory consumption was 139.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:58,527 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 487.39 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 101.4 MB in the beginning and 177.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.36 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 175.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 570.49 ms. Allocated memory is still 201.3 MB. Free memory was 175.9 MB in the beginning and 148.2 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9003.69 ms. Allocated memory was 201.3 MB in the beginning and 364.4 MB in the end (delta: 163.1 MB). Free memory was 147.5 MB in the beginning and 171.0 MB in the end (delta: -23.5 MB). Peak memory consumption was 139.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: ((((((n <= 5 && 5 <= n) && 0 == i) || (((n <= 5 && i <= 4) && 5 <= n) && 4 <= i)) || ((2 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i <= 1) && 1 <= i)) || (((n <= 5 && 5 <= i) && 5 <= n) && i < 46)) || ((3 == i && n <= 5) && 5 <= n) - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: (((((((n <= 5 && 5 <= n) && 4 == i) || ((n <= 5 && 5 <= n) && 0 == i)) || ((2 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i <= 1) && 1 <= i)) || (((n <= 5 && 5 <= i) && 5 <= n) && i < 46)) || ((3 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i < 47) && 6 <= i) - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.2s, OverallIterations: 13, TraceHistogramMax: 66, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 342 SDtfs, 304 SDslu, 1166 SDs, 0 SdLazy, 2009 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2183 GetRequests, 2061 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=341occurred in iteration=12, 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, 13 MinimizatonAttempts, 239 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 55 PreInvPairs, 121 NumberOfFragments, 238 HoareAnnotationTreeSize, 55 FomulaSimplifications, 2172 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 21 FomulaSimplificationsInter, 87 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 1316 NumberOfCodeBlocks, 1316 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 2149 ConstructedInterpolants, 0 QuantifiedInterpolants, 1139471 SizeOfPredicates, 24 NumberOfNonLiveVariables, 3199 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 18135/26835 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...