/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/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:57:52,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:57:52,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:57:52,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:57:52,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:57:52,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:57:52,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:57:52,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:57:52,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:57:52,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:57:52,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:57:53,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:57:53,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:57:53,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:57:53,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:57:53,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:57:53,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:57:53,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:57:53,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:57:53,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:57:53,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:57:53,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:57:53,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:57:53,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:57:53,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:57:53,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:57:53,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:57:53,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:57:53,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:57:53,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:57:53,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:57:53,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:57:53,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:57:53,044 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:57:53,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:57:53,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:57:53,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:57:53,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:57:53,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:57:53,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:57:53,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:57:53,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:57:53,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:57:53,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:57:53,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:57:53,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:57:53,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:57:53,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:57:53,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:57:53,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:57:53,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:57:53,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:57:53,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:57:53,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:57:53,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:57:53,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:53,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:57:53,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:57:53,049 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 [2020-07-21 10:57:53,348 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:57:53,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:57:53,373 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:57:53,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:57:53,376 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:57:53,377 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-07-21 10:57:53,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0886a89f/14d9b24bd115494a9f2d233a7ea6b4f9/FLAG7c603c245 [2020-07-21 10:57:53,976 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:57:53,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-07-21 10:57:53,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0886a89f/14d9b24bd115494a9f2d233a7ea6b4f9/FLAG7c603c245 [2020-07-21 10:57:54,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0886a89f/14d9b24bd115494a9f2d233a7ea6b4f9 [2020-07-21 10:57:54,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:57:54,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:57:54,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:57:54,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:57:54,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:57:54,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b58d8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54, skipping insertion in model container [2020-07-21 10:57:54,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:57:54,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:57:54,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:57:54,592 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:57:54,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:57:54,627 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:57:54,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54 WrapperNode [2020-07-21 10:57:54,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:57:54,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:57:54,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:57:54,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:57:54,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (1/1) ... [2020-07-21 10:57:54,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:57:54,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:57:54,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:57:54,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:57:54,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:57:54,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:57:54,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:57:54,840 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 10:57:54,840 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 10:57:54,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:57:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:57:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:57:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 10:57:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 10:57:54,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:57:54,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:57:54,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:57:55,053 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:57:55,053 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:57:55,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:57:55 BoogieIcfgContainer [2020-07-21 10:57:55,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:57:55,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:57:55,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:57:55,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:57:55,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:57:54" (1/3) ... [2020-07-21 10:57:55,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f3ff56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:57:55, skipping insertion in model container [2020-07-21 10:57:55,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:54" (2/3) ... [2020-07-21 10:57:55,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f3ff56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:57:55, skipping insertion in model container [2020-07-21 10:57:55,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:57:55" (3/3) ... [2020-07-21 10:57:55,065 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-07-21 10:57:55,078 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:57:55,086 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:57:55,100 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:57:55,124 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:57:55,125 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:57:55,125 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:57:55,125 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:57:55,125 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:57:55,126 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:57:55,126 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:57:55,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:57:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 10:57:55,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:57:55,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:55,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:55,156 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:55,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 10:57:55,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:55,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230502077] [2020-07-21 10:57:55,170 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 [2020-07-21 10:57:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:55,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:57:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:57:55,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:57:55,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230502077] [2020-07-21 10:57:55,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:57:55,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:57:55,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214229974] [2020-07-21 10:57:55,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:57:55,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:55,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:57:55,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:57:55,382 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 10:57:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:55,516 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 10:57:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:57:55,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:57:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:55,531 INFO L225 Difference]: With dead ends: 44 [2020-07-21 10:57:55,531 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:57:55,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:57:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:57:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 10:57:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:57:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:57:55,589 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 10:57:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:55,590 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:57:55,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:57:55,590 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:57:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:57:55,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:55,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:55,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:55,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:55,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:55,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 10:57:55,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:55,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518341085] [2020-07-21 10:57:55,812 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 [2020-07-21 10:57:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:57:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:57:55,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:57:55,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518341085] [2020-07-21 10:57:55,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:57:55,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:57:55,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481552028] [2020-07-21 10:57:55,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:57:55,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:55,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:57:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:57:55,884 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 10:57:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:55,961 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 10:57:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:57:55,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:57:55,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:55,964 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:57:55,965 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 10:57:55,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:57:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 10:57:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 10:57:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:57:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:57:55,978 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 10:57:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:55,978 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:57:55,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:57:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:57:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:57:55,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:55,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:56,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:56,198 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:56,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:56,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 10:57:56,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:56,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556084321] [2020-07-21 10:57:56,202 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 [2020-07-21 10:57:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:56,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:56,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:56,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:56,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556084321] [2020-07-21 10:57:56,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:56,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:57:56,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798970481] [2020-07-21 10:57:56,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:57:56,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:56,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:57:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:57:56,567 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 10:57:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:56,723 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 10:57:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:57:56,723 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 10:57:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:56,726 INFO L225 Difference]: With dead ends: 41 [2020-07-21 10:57:56,726 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 10:57:56,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 10:57:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 10:57:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:57:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:57:56,737 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 10:57:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:56,738 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:57:56,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:57:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:57:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:57:56,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:56,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:56,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:56,956 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 10:57:56,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:56,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623369505] [2020-07-21 10:57:56,959 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 [2020-07-21 10:57:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:56,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:57,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:57,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:57,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623369505] [2020-07-21 10:57:57,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:57,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:57:57,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077458110] [2020-07-21 10:57:57,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:57:57,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:57:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:57:57,231 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 10:57:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:57,357 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 10:57:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:57:57,358 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 10:57:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:57,360 INFO L225 Difference]: With dead ends: 46 [2020-07-21 10:57:57,360 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 10:57:57,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 10:57:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 10:57:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:57:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:57:57,372 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 10:57:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:57,372 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:57:57,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:57:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:57:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:57:57,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:57,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:57,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:57,589 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 10:57:57,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:57,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174141258] [2020-07-21 10:57:57,591 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 [2020-07-21 10:57:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:57,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:57:57,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:57,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:57:58,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174141258] [2020-07-21 10:57:58,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:58,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:57:58,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321845664] [2020-07-21 10:57:58,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:57:58,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:58,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:57:58,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:58,104 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 10:57:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:58,308 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 10:57:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:58,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 10:57:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:58,311 INFO L225 Difference]: With dead ends: 51 [2020-07-21 10:57:58,311 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 10:57:58,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:57:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 10:57:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 10:57:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:57:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:57:58,334 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 10:57:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:58,334 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:57:58,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:57:58,336 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:57:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 10:57:58,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:58,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:58,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:58,557 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 10:57:58,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:58,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887935606] [2020-07-21 10:57:58,559 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 [2020-07-21 10:57:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:58,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 10:57:58,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:58,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:57:58,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887935606] [2020-07-21 10:57:58,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:58,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:57:58,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446138662] [2020-07-21 10:57:58,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:57:58,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:57:58,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:58,989 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 10:57:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:59,162 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 10:57:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:59,163 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 10:57:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:59,164 INFO L225 Difference]: With dead ends: 56 [2020-07-21 10:57:59,165 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:57:59,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:57:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:57:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 10:57:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:57:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:57:59,175 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 10:57:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:59,176 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:57:59,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:57:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:57:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:57:59,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:59,178 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:59,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:59,387 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:59,388 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 10:57:59,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:59,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858043377] [2020-07-21 10:57:59,390 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 [2020-07-21 10:57:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:59,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:59,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:57:59,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:59,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:59,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:00,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:00,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:58:00,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858043377] [2020-07-21 10:58:00,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:00,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:58:00,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060970144] [2020-07-21 10:58:00,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:58:00,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:00,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:58:00,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:00,110 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 10:58:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:00,326 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 10:58:00,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:00,327 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 10:58:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:00,329 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:58:00,329 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:58:00,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:58:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:58:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 10:58:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:58:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:58:00,343 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 10:58:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:00,343 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:58:00,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:58:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:58:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:58:00,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:00,346 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:00,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:00,560 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:00,561 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 10:58:00,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:00,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482433533] [2020-07-21 10:58:00,563 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 [2020-07-21 10:58:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 10:58:00,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:01,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:58:01,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482433533] [2020-07-21 10:58:01,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:01,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:01,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890949473] [2020-07-21 10:58:01,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:01,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:01,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:01,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:01,294 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 13 states. [2020-07-21 10:58:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:01,499 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 10:58:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:01,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-21 10:58:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:01,507 INFO L225 Difference]: With dead ends: 66 [2020-07-21 10:58:01,507 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:58:01,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:58:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 10:58:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:58:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:58:01,523 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 10:58:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:01,524 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:58:01,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:58:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 10:58:01,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:01,526 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:01,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:01,742 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 10:58:01,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:01,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046886530] [2020-07-21 10:58:01,744 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 [2020-07-21 10:58:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:01,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:01,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 10:58:01,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:02,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 10:58:02,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046886530] [2020-07-21 10:58:02,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:02,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:02,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252875039] [2020-07-21 10:58:02,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:02,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:02,849 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 15 states. [2020-07-21 10:58:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:03,110 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 10:58:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:03,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-07-21 10:58:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:03,114 INFO L225 Difference]: With dead ends: 71 [2020-07-21 10:58:03,114 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 10:58:03,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 10:58:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 10:58:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:58:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:58:03,131 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 10:58:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:03,132 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:58:03,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:58:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 10:58:03,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:03,135 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:03,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:03,349 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 10:58:03,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:03,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804066519] [2020-07-21 10:58:03,351 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 [2020-07-21 10:58:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:03,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 79 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-07-21 10:58:03,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:03,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-21 10:58:04,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804066519] [2020-07-21 10:58:04,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:04,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:04,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866376970] [2020-07-21 10:58:04,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:04,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:04,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:04,135 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 13 states. [2020-07-21 10:58:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:04,325 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-07-21 10:58:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:04,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-07-21 10:58:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:04,334 INFO L225 Difference]: With dead ends: 84 [2020-07-21 10:58:04,334 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 10:58:04,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 10:58:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-07-21 10:58:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 10:58:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 10:58:04,348 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 108 [2020-07-21 10:58:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:04,348 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 10:58:04,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 10:58:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 10:58:04,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:04,350 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:04,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:04,565 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -60364660, now seen corresponding path program 1 times [2020-07-21 10:58:04,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:04,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942016242] [2020-07-21 10:58:04,567 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 [2020-07-21 10:58:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:04,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:58:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-21 10:58:04,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:05,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-21 10:58:05,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942016242] [2020-07-21 10:58:05,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:05,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:58:05,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58995899] [2020-07-21 10:58:05,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:58:05,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:05,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:58:05,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:58:05,164 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 11 states. [2020-07-21 10:58:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:05,310 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2020-07-21 10:58:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:58:05,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-07-21 10:58:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:05,315 INFO L225 Difference]: With dead ends: 79 [2020-07-21 10:58:05,315 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 10:58:05,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:05,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 10:58:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-21 10:58:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 10:58:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2020-07-21 10:58:05,328 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 109 [2020-07-21 10:58:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:05,328 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2020-07-21 10:58:05,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:58:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2020-07-21 10:58:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 10:58:05,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:05,331 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:05,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:05,547 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:05,548 INFO L82 PathProgramCache]: Analyzing trace with hash 836558126, now seen corresponding path program 1 times [2020-07-21 10:58:05,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:05,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469295902] [2020-07-21 10:58:05,550 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 [2020-07-21 10:58:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 105 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-07-21 10:58:05,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:06,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 113 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-21 10:58:06,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469295902] [2020-07-21 10:58:06,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:06,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:06,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133651995] [2020-07-21 10:58:06,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:06,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:06,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:06,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:06,788 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand 15 states. [2020-07-21 10:58:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:07,072 INFO L93 Difference]: Finished difference Result 94 states and 199 transitions. [2020-07-21 10:58:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:07,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 10:58:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:07,074 INFO L225 Difference]: With dead ends: 94 [2020-07-21 10:58:07,075 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:58:07,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:58:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-21 10:58:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 10:58:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2020-07-21 10:58:07,088 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 135 [2020-07-21 10:58:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:07,089 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2020-07-21 10:58:07,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2020-07-21 10:58:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:58:07,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:07,093 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:07,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:07,308 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:07,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1608635723, now seen corresponding path program 2 times [2020-07-21 10:58:07,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:07,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552024060] [2020-07-21 10:58:07,310 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 [2020-07-21 10:58:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-21 10:58:07,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:07,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:07,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 82 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-07-21 10:58:08,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552024060] [2020-07-21 10:58:08,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:08,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:08,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471128798] [2020-07-21 10:58:08,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:08,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:08,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:08,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:08,144 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand 13 states. [2020-07-21 10:58:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:08,333 INFO L93 Difference]: Finished difference Result 92 states and 161 transitions. [2020-07-21 10:58:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:08,333 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 10:58:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:08,336 INFO L225 Difference]: With dead ends: 92 [2020-07-21 10:58:08,336 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 10:58:08,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 10:58:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-07-21 10:58:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 10:58:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2020-07-21 10:58:08,349 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 121 [2020-07-21 10:58:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:08,349 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2020-07-21 10:58:08,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2020-07-21 10:58:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-21 10:58:08,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:08,351 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:08,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:08,566 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:08,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-21 10:58:08,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:08,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347503151] [2020-07-21 10:58:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:58:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 10:58:08,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:08,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-21 10:58:09,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347503151] [2020-07-21 10:58:09,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:09,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:58:09,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387791265] [2020-07-21 10:58:09,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:58:09,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:09,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:58:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:58:09,100 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand 11 states. [2020-07-21 10:58:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:09,237 INFO L93 Difference]: Finished difference Result 84 states and 140 transitions. [2020-07-21 10:58:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:58:09,238 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-07-21 10:58:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:09,241 INFO L225 Difference]: With dead ends: 84 [2020-07-21 10:58:09,241 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 10:58:09,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 10:58:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-21 10:58:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 10:58:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 122 transitions. [2020-07-21 10:58:09,252 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 122 transitions. Word has length 95 [2020-07-21 10:58:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:09,253 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 122 transitions. [2020-07-21 10:58:09,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:58:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 122 transitions. [2020-07-21 10:58:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 10:58:09,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:09,255 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:09,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:09,471 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 4 times [2020-07-21 10:58:09,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:09,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231907980] [2020-07-21 10:58:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:09,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 83 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-21 10:58:09,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:09,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 10:58:10,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231907980] [2020-07-21 10:58:10,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:10,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:10,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342533841] [2020-07-21 10:58:10,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:10,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:10,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:10,235 INFO L87 Difference]: Start difference. First operand 72 states and 122 transitions. Second operand 13 states. [2020-07-21 10:58:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:10,432 INFO L93 Difference]: Finished difference Result 92 states and 158 transitions. [2020-07-21 10:58:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:10,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2020-07-21 10:58:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:10,437 INFO L225 Difference]: With dead ends: 92 [2020-07-21 10:58:10,438 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 10:58:10,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 193 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 10:58:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-07-21 10:58:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 10:58:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 10:58:10,453 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 107 [2020-07-21 10:58:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:10,454 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 10:58:10,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 10:58:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 10:58:10,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:10,456 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:10,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:10,672 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 5 times [2020-07-21 10:58:10,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:10,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439967052] [2020-07-21 10:58:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:58:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-07-21 10:58:10,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:11,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 10:58:11,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439967052] [2020-07-21 10:58:11,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:11,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:58:11,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400145737] [2020-07-21 10:58:11,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:58:11,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:11,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:58:11,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:58:11,261 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 11 states. [2020-07-21 10:58:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:11,397 INFO L93 Difference]: Finished difference Result 91 states and 155 transitions. [2020-07-21 10:58:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:58:11,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-07-21 10:58:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:11,402 INFO L225 Difference]: With dead ends: 91 [2020-07-21 10:58:11,402 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 10:58:11,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:11,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 10:58:11,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-07-21 10:58:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 10:58:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 10:58:11,419 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 108 [2020-07-21 10:58:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:11,420 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 10:58:11,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:58:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 10:58:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 10:58:11,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:11,424 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:11,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:11,637 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:11,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-21 10:58:11,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:11,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675314496] [2020-07-21 10:58:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:58:11,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:58:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:58:11,747 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:58:11,811 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:58:11,813 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:58:12,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:12,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:58:12 BoogieIcfgContainer [2020-07-21 10:58:12,075 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:58:12,078 INFO L168 Benchmark]: Toolchain (without parser) took 17711.89 ms. Allocated memory was 143.1 MB in the beginning and 374.3 MB in the end (delta: 231.2 MB). Free memory was 101.0 MB in the beginning and 170.5 MB in the end (delta: -69.5 MB). Peak memory consumption was 161.7 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:12,079 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:58:12,080 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.07 ms. Allocated memory is still 143.1 MB. Free memory was 100.8 MB in the beginning and 91.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:12,081 INFO L168 Benchmark]: Boogie Preprocessor took 144.10 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 91.1 MB in the beginning and 179.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:12,081 INFO L168 Benchmark]: RCFGBuilder took 283.94 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 166.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:12,082 INFO L168 Benchmark]: TraceAbstraction took 17016.67 ms. Allocated memory was 200.8 MB in the beginning and 374.3 MB in the end (delta: 173.5 MB). Free memory was 165.3 MB in the beginning and 170.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 168.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:12,085 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.07 ms. Allocated memory is still 143.1 MB. Free memory was 100.8 MB in the beginning and 91.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.10 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 91.1 MB in the beginning and 179.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.94 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 166.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17016.67 ms. Allocated memory was 200.8 MB in the beginning and 374.3 MB in the end (delta: 173.5 MB). Free memory was 165.3 MB in the beginning and 170.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 168.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; VAL [x=5] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L37] int result = fibo1(x); [L38] COND TRUE result == 5 VAL [result=5, x=5] [L39] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.9s, OverallIterations: 17, TraceHistogramMax: 11, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 372 SDtfs, 564 SDslu, 1730 SDs, 0 SdLazy, 1686 SolverSat, 421 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2277 GetRequests, 1968 SyntacticMatches, 107 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 185 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 1235 NumberOfCodeBlocks, 1235 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2195 ConstructedInterpolants, 0 QuantifiedInterpolants, 368621 SizeOfPredicates, 67 NumberOfNonLiveVariables, 2536 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 3469/4520 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 incorrect! Received shutdown request...