/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:34:22,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:34:22,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:34:22,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:34:22,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:34:22,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:34:22,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:34:22,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:34:22,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:34:22,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:34:22,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:34:22,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:34:22,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:34:22,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:34:22,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:34:22,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:34:22,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:34:22,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:34:22,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:34:22,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:34:22,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:34:22,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:34:22,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:34:22,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:34:22,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 03:34:22,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 03:34:22,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 03:34:22,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 03:34:22,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 03:34:22,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 03:34:22,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 03:34:22,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 03:34:22,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 03:34:22,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 03:34:22,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 03:34:22,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 03:34:22,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 03:34:22,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 03:34:22,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:34:22,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:34:22,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:34:22,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:34:22,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:34:22,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:34:22,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:34:22,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:34:22,245 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:34:22,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:34:22,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:34:22,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:34:22,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:34:22,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:34:22,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:34:22,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:34:22,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:34:22,247 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:34:22,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:34:22,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:34:22,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:34:22,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:34:22,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:34:22,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:34:22,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:34:22,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:34:22,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:34:22,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:34:22,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:34:22,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:34:22,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:34:22,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:34:22,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:34:22,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:34:22,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:34:22,523 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:34:22,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:34:22,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:34:22,529 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:34:22,530 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-20 03:34:22,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfa4576b5/a2e362dd470240dc8fa7b8af907998be/FLAGea4d0119c [2020-07-20 03:34:23,068 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:34:23,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-20 03:34:23,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfa4576b5/a2e362dd470240dc8fa7b8af907998be/FLAGea4d0119c [2020-07-20 03:34:23,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfa4576b5/a2e362dd470240dc8fa7b8af907998be [2020-07-20 03:34:23,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:34:23,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:34:23,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:34:23,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:34:23,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:34:23,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dae3980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23, skipping insertion in model container [2020-07-20 03:34:23,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:34:23,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:34:23,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:34:23,647 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:34:23,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:34:23,679 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:34:23,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23 WrapperNode [2020-07-20 03:34:23,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:34:23,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:34:23,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:34:23,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:34:23,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (1/1) ... [2020-07-20 03:34:23,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:34:23,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:34:23,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:34:23,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:34:23,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:34:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:34:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:34:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 03:34:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 03:34:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:34:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:34:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:34:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 03:34:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 03:34:23,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:34:23,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:34:23,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:34:24,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:34:24,050 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:34:24,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:34:24 BoogieIcfgContainer [2020-07-20 03:34:24,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:34:24,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:34:24,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:34:24,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:34:24,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:34:23" (1/3) ... [2020-07-20 03:34:24,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144e101f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:34:24, skipping insertion in model container [2020-07-20 03:34:24,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:23" (2/3) ... [2020-07-20 03:34:24,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144e101f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:34:24, skipping insertion in model container [2020-07-20 03:34:24,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:34:24" (3/3) ... [2020-07-20 03:34:24,077 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-07-20 03:34:24,089 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:34:24,111 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:34:24,129 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:34:24,150 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:34:24,151 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:34:24,151 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:34:24,151 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:34:24,151 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:34:24,151 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:34:24,152 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:34:24,152 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:34:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 03:34:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:34:24,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:24,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:24,177 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 03:34:24,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:24,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974904455] [2020-07-20 03:34:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:34:24,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974904455] [2020-07-20 03:34:24,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:34:24,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:34:24,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168076795] [2020-07-20 03:34:24,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:34:24,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:24,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:34:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:34:24,429 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 03:34:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:24,526 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 03:34:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:34:24,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:34:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:24,538 INFO L225 Difference]: With dead ends: 44 [2020-07-20 03:34:24,539 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:34:24,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:34:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:34:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:34:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:34:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 03:34:24,588 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 03:34:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:24,589 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 03:34:24,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:34:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 03:34:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 03:34:24,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:24,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:24,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:34:24,592 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 03:34:24,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:24,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95976539] [2020-07-20 03:34:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:34:24,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95976539] [2020-07-20 03:34:24,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:34:24,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:34:24,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351416740] [2020-07-20 03:34:24,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:34:24,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:24,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:34:24,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:34:24,661 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 03:34:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:24,732 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 03:34:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:34:24,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 03:34:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:24,735 INFO L225 Difference]: With dead ends: 36 [2020-07-20 03:34:24,735 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 03:34:24,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:34:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 03:34:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 03:34:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:34:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 03:34:24,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 03:34:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:24,747 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 03:34:24,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:34:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 03:34:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:34:24,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:24,750 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] [2020-07-20 03:34:24,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:34:24,750 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 03:34:24,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:24,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776649940] [2020-07-20 03:34:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:24,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776649940] [2020-07-20 03:34:24,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264975250] [2020-07-20 03:34:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ee92522 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:24,931 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ee92522 issued 3 check-sat command(s) [2020-07-20 03:34:24,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:34:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:25,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:25,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 03:34:25,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761774710] [2020-07-20 03:34:25,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:34:25,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:34:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:34:25,053 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 03:34:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:25,269 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-20 03:34:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:34:25,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 03:34:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:25,271 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:34:25,271 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 03:34:25,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:34:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 03:34:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-20 03:34:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 03:34:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-20 03:34:25,282 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-20 03:34:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:25,282 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-20 03:34:25,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:34:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-20 03:34:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 03:34:25,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:25,285 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] [2020-07-20 03:34:25,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:34:25,499 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 03:34:25,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:25,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239781493] [2020-07-20 03:34:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:25,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239781493] [2020-07-20 03:34:25,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838265256] [2020-07-20 03:34:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@41dae8cf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:25,679 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@41dae8cf issued 3 check-sat command(s) [2020-07-20 03:34:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:34:25,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:25,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:25,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 03:34:25,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770552497] [2020-07-20 03:34:25,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:34:25,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:34:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:34:25,735 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-20 03:34:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:25,915 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-20 03:34:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:34:25,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 03:34:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:25,919 INFO L225 Difference]: With dead ends: 54 [2020-07-20 03:34:25,920 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 03:34:25,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:34:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 03:34:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-20 03:34:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:34:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-20 03:34:25,933 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-20 03:34:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:25,933 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-20 03:34:25,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:34:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-20 03:34:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 03:34:25,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:25,936 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] [2020-07-20 03:34:26,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:26,153 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 03:34:26,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:26,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288742525] [2020-07-20 03:34:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 03:34:26,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288742525] [2020-07-20 03:34:26,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403088823] [2020-07-20 03:34:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4629ab4f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:26,350 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4629ab4f issued 3 check-sat command(s) [2020-07-20 03:34:26,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:26,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:26,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:34:26,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:26,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-20 03:34:26,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385967010] [2020-07-20 03:34:26,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:34:26,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:26,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:34:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:34:26,421 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-20 03:34:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:26,700 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-20 03:34:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:34:26,701 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 03:34:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:26,703 INFO L225 Difference]: With dead ends: 108 [2020-07-20 03:34:26,703 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:34:26,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:34:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:34:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 03:34:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 03:34:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-20 03:34:26,721 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-20 03:34:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:26,721 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-20 03:34:26,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:34:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-20 03:34:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 03:34:26,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:26,724 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] [2020-07-20 03:34:26,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:26,938 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 03:34:26,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:26,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102598773] [2020-07-20 03:34:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 03:34:27,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102598773] [2020-07-20 03:34:27,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420817793] [2020-07-20 03:34:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16f8d438 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:27,157 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16f8d438 issued 3 check-sat command(s) [2020-07-20 03:34:27,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:27,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 03:34:27,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:27,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 03:34:27,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852905532] [2020-07-20 03:34:27,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:34:27,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:27,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:34:27,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:34:27,230 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-20 03:34:27,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:27,677 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-20 03:34:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:34:27,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-20 03:34:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:27,681 INFO L225 Difference]: With dead ends: 180 [2020-07-20 03:34:27,681 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 03:34:27,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:34:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 03:34:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-20 03:34:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 03:34:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-20 03:34:27,706 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-20 03:34:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:27,707 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-20 03:34:27,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:34:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-20 03:34:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 03:34:27,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:27,710 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] [2020-07-20 03:34:27,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:27,924 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 03:34:27,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:27,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973160817] [2020-07-20 03:34:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 03:34:28,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973160817] [2020-07-20 03:34:28,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578519074] [2020-07-20 03:34:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@448f707c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:28,138 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@448f707c issued 3 check-sat command(s) [2020-07-20 03:34:28,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:28,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:34:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 03:34:28,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:28,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-20 03:34:28,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329583212] [2020-07-20 03:34:28,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:34:28,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:28,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:34:28,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:34:28,264 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-07-20 03:34:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:28,751 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-20 03:34:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:34:28,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 03:34:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:28,755 INFO L225 Difference]: With dead ends: 258 [2020-07-20 03:34:28,755 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 03:34:28,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:34:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 03:34:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-20 03:34:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 03:34:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-20 03:34:28,801 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-20 03:34:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:28,801 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-20 03:34:28,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:34:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-20 03:34:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 03:34:28,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:28,810 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 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] [2020-07-20 03:34:29,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:34:29,012 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:29,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-07-20 03:34:29,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:29,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596304760] [2020-07-20 03:34:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-20 03:34:29,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596304760] [2020-07-20 03:34:29,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910590095] [2020-07-20 03:34:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@340561a1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:29,345 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@340561a1 issued 3 check-sat command(s) [2020-07-20 03:34:29,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:29,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:34:29,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 03:34:29,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:29,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-07-20 03:34:29,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102985962] [2020-07-20 03:34:29,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:34:29,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:29,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:34:29,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:34:29,456 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 16 states. [2020-07-20 03:34:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:30,024 INFO L93 Difference]: Finished difference Result 243 states and 465 transitions. [2020-07-20 03:34:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 03:34:30,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-07-20 03:34:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:30,027 INFO L225 Difference]: With dead ends: 243 [2020-07-20 03:34:30,027 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 03:34:30,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:34:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 03:34:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-07-20 03:34:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 03:34:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-07-20 03:34:30,045 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 82 [2020-07-20 03:34:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:30,046 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-07-20 03:34:30,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:34:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-07-20 03:34:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 03:34:30,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:30,049 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:30,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:30,263 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:30,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times [2020-07-20 03:34:30,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:30,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557349539] [2020-07-20 03:34:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-07-20 03:34:30,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557349539] [2020-07-20 03:34:30,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797256046] [2020-07-20 03:34:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c97c03b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:30,572 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c97c03b issued 3 check-sat command(s) [2020-07-20 03:34:30,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:30,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:34:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-07-20 03:34:30,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:30,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-20 03:34:30,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538933455] [2020-07-20 03:34:30,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:34:30,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:34:30,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:34:30,663 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 15 states. [2020-07-20 03:34:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:31,122 INFO L93 Difference]: Finished difference Result 172 states and 251 transitions. [2020-07-20 03:34:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 03:34:31,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 123 [2020-07-20 03:34:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:31,125 INFO L225 Difference]: With dead ends: 172 [2020-07-20 03:34:31,125 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 03:34:31,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-07-20 03:34:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 03:34:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-07-20 03:34:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 03:34:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2020-07-20 03:34:31,136 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 123 [2020-07-20 03:34:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:31,137 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2020-07-20 03:34:31,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:34:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2020-07-20 03:34:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-20 03:34:31,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:31,139 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:31,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:31,353 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1830253150, now seen corresponding path program 2 times [2020-07-20 03:34:31,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:31,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67762232] [2020-07-20 03:34:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 110 proven. 86 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-07-20 03:34:31,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67762232] [2020-07-20 03:34:31,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548444709] [2020-07-20 03:34:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35085f94 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:31,738 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35085f94 issued 3 check-sat command(s) [2020-07-20 03:34:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:34:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 78 proven. 106 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-07-20 03:34:31,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:31,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2020-07-20 03:34:31,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270884413] [2020-07-20 03:34:31,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:34:31,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:34:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:34:31,869 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand 18 states. [2020-07-20 03:34:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:32,456 INFO L93 Difference]: Finished difference Result 204 states and 330 transitions. [2020-07-20 03:34:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 03:34:32,457 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 137 [2020-07-20 03:34:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:32,459 INFO L225 Difference]: With dead ends: 204 [2020-07-20 03:34:32,459 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 03:34:32,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:34:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 03:34:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-07-20 03:34:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 03:34:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-07-20 03:34:32,485 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 137 [2020-07-20 03:34:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:32,486 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-07-20 03:34:32,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:34:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-07-20 03:34:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 03:34:32,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:32,489 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:32,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 03:34:32,702 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:32,702 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 1 times [2020-07-20 03:34:32,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:32,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217284976] [2020-07-20 03:34:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-07-20 03:34:33,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217284976] [2020-07-20 03:34:33,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917730086] [2020-07-20 03:34:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@599ec80b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:33,279 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@599ec80b issued 4 check-sat command(s) [2020-07-20 03:34:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:33,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:34:33,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-07-20 03:34:33,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:33,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 17 [2020-07-20 03:34:33,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304472534] [2020-07-20 03:34:33,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 03:34:33,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:33,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 03:34:33,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:34:33,364 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 17 states. [2020-07-20 03:34:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:33,867 INFO L93 Difference]: Finished difference Result 202 states and 257 transitions. [2020-07-20 03:34:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 03:34:33,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 150 [2020-07-20 03:34:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:33,871 INFO L225 Difference]: With dead ends: 202 [2020-07-20 03:34:33,871 INFO L226 Difference]: Without dead ends: 114 [2020-07-20 03:34:33,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:34:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-20 03:34:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-07-20 03:34:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-20 03:34:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2020-07-20 03:34:33,889 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 150 [2020-07-20 03:34:33,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:33,891 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2020-07-20 03:34:33,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 03:34:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2020-07-20 03:34:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-20 03:34:33,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:33,895 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:34,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:34,109 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:34,109 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 2 times [2020-07-20 03:34:34,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:34,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128438183] [2020-07-20 03:34:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-20 03:34:35,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128438183] [2020-07-20 03:34:35,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696234238] [2020-07-20 03:34:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39b2114c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:35,207 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39b2114c issued 4 check-sat command(s) [2020-07-20 03:34:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-20 03:34:35,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-20 03:34:35,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:35,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-20 03:34:35,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533938835] [2020-07-20 03:34:35,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 03:34:35,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 03:34:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 03:34:35,942 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand 36 states. [2020-07-20 03:34:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:36,307 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2020-07-20 03:34:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 03:34:36,307 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-07-20 03:34:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:36,309 INFO L225 Difference]: With dead ends: 128 [2020-07-20 03:34:36,309 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 03:34:36,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 233 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 03:34:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 03:34:36,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-07-20 03:34:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 03:34:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-07-20 03:34:36,337 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 177 [2020-07-20 03:34:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:36,337 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-07-20 03:34:36,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 03:34:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-07-20 03:34:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-20 03:34:36,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:36,340 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:36,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:36,555 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:36,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1318513955, now seen corresponding path program 3 times [2020-07-20 03:34:36,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:36,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360252363] [2020-07-20 03:34:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6033782 [2020-07-20 03:34:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 153 proven. 211 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2020-07-20 03:34:36,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360252363] [2020-07-20 03:34:36,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528920869] [2020-07-20 03:34:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3fcb6f8f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:37,000 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3fcb6f8f issued 3 check-sat command(s) [2020-07-20 03:34:37,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:37,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:34:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 101 proven. 317 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2020-07-20 03:34:37,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:37,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2020-07-20 03:34:37,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615772756] [2020-07-20 03:34:37,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:34:37,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:37,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:34:37,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:34:37,195 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 19 states. [2020-07-20 03:34:37,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:37,480 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2020-07-20 03:34:37,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:34:37,482 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 204 [2020-07-20 03:34:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:37,482 INFO L225 Difference]: With dead ends: 154 [2020-07-20 03:34:37,482 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:34:37,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2020-07-20 03:34:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:34:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:34:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:34:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:34:37,485 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2020-07-20 03:34:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:37,486 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:34:37,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:34:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:34:37,486 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:34:37,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 03:34:37,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:34:38,634 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 21 [2020-07-20 03:34:39,093 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2020-07-20 03:34:39,097 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:34:39,098 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:34:39,098 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:34:39,098 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:34:39,098 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:34:39,098 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:34:39,098 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 03:34:39,099 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 03:34:39,099 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 03:34:39,099 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 03:34:39,099 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 03:34:39,099 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 03:34:39,100 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2020-07-20 03:34:39,100 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 03:34:39,100 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 03:34:39,100 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 03:34:39,100 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-20 03:34:39,100 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 03:34:39,100 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (or (<= 5 fibo2_~n) (and (<= |fibo2_#t~ret2| 1) (<= 1 |fibo2_#t~ret2|))) (or (<= |fibo2_#in~n| 3) (<= 6 |fibo2_#in~n|) (and (<= |fibo2_#t~ret2| 3) (<= 3 |fibo2_#t~ret2|))) (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-07-20 03:34:39,100 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 03:34:39,101 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 03:34:39,101 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 03:34:39,101 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 03:34:39,101 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 03:34:39,101 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 03:34:39,101 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-07-20 03:34:39,101 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 03:34:39,101 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (or (<= 5 |fibo1_#in~n|) (<= |fibo1_#in~n| 3) (and (<= |fibo1_#t~ret0| 2) (<= 2 |fibo1_#t~ret0|))) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse0) (and .cse0 (<= 4 |fibo1_#in~n|)))) (or (<= 7 |fibo1_#in~n|) (<= |fibo1_#in~n| 5) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)))) [2020-07-20 03:34:39,102 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 03:34:39,102 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 03:34:39,102 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 03:34:39,102 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 03:34:39,102 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 03:34:39,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:34:39 BoogieIcfgContainer [2020-07-20 03:34:39,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:34:39,110 INFO L168 Benchmark]: Toolchain (without parser) took 15660.80 ms. Allocated memory was 137.4 MB in the beginning and 428.3 MB in the end (delta: 291.0 MB). Free memory was 102.2 MB in the beginning and 363.9 MB in the end (delta: -261.7 MB). Peak memory consumption was 308.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:39,110 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 03:34:39,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.40 ms. Allocated memory is still 137.4 MB. Free memory was 101.8 MB in the beginning and 91.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:39,113 INFO L168 Benchmark]: Boogie Preprocessor took 106.84 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 180.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:39,114 INFO L168 Benchmark]: RCFGBuilder took 270.12 ms. Allocated memory is still 201.3 MB. Free memory was 180.2 MB in the beginning and 166.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:39,115 INFO L168 Benchmark]: TraceAbstraction took 15038.81 ms. Allocated memory was 201.3 MB in the beginning and 428.3 MB in the end (delta: 227.0 MB). Free memory was 166.8 MB in the beginning and 363.9 MB in the end (delta: -197.2 MB). Peak memory consumption was 308.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:39,117 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.40 ms. Allocated memory is still 137.4 MB. Free memory was 101.8 MB in the beginning and 91.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.84 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 180.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 270.12 ms. Allocated memory is still 201.3 MB. Free memory was 180.2 MB in the beginning and 166.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15038.81 ms. Allocated memory was 201.3 MB in the beginning and 428.3 MB in the end (delta: 227.0 MB). Free memory was 166.8 MB in the beginning and 363.9 MB in the end (delta: -197.2 MB). Peak memory consumption was 308.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.5s, OverallIterations: 13, TraceHistogramMax: 15, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 422 SDtfs, 544 SDslu, 3708 SDs, 0 SdLazy, 3771 SolverSat, 532 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1645 GetRequests, 1375 SyntacticMatches, 14 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=7, 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, 13 MinimizatonAttempts, 101 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 461 PreInvPairs, 643 NumberOfFragments, 110 HoareAnnotationTreeSize, 461 FomulaSimplifications, 3273 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3562 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 2145 NumberOfCodeBlocks, 1971 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 2121 ConstructedInterpolants, 0 QuantifiedInterpolants, 604931 SizeOfPredicates, 50 NumberOfNonLiveVariables, 2085 ConjunctsInSsa, 201 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 5082/6862 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...