/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:33:45,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:33:45,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:33:45,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:33:45,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:33:45,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:33:45,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:33:45,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:33:45,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:33:45,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:33:45,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:33:45,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:33:45,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:33:45,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:33:45,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:33:45,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:33:45,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:33:45,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:33:45,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:33:45,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:33:45,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:33:45,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:33:45,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:33:45,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:33:45,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 03:33:45,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 03:33:45,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 03:33:45,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 03:33:45,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 03:33:45,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 03:33:45,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 03:33:45,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 03:33:45,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 03:33:45,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:33:45,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:33:45,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:33:45,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 03:33:45,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:33:45,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:33:45,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:33:45,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:33:45,154 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:33:45,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:33:45,155 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:33:45,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:33:45,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:33:45,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:33:45,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:33:45,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:33:45,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:33:45,157 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:33:45,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:33:45,158 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:33:45,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:33:45,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:33:45,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:33:45,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:33:45,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:33:45,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:33:45,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:33:45,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:33:45,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:33:45,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:33:45,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:33:45,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:33:45,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:33:45,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:33:45,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:33:45,491 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:33:45,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:33:45,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:33:45,496 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:33:45,497 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-19 03:33:45,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32689d943/92c659fa33b747b48fe0c96f245c16f9/FLAG8c3e12540 [2020-08-19 03:33:46,032 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:33:46,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-19 03:33:46,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32689d943/92c659fa33b747b48fe0c96f245c16f9/FLAG8c3e12540 [2020-08-19 03:33:46,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32689d943/92c659fa33b747b48fe0c96f245c16f9 [2020-08-19 03:33:46,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:33:46,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:33:46,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:33:46,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:33:46,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:33:46,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cdd711c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46, skipping insertion in model container [2020-08-19 03:33:46,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:33:46,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:33:46,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:33:46,622 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:33:46,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:33:46,655 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:33:46,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46 WrapperNode [2020-08-19 03:33:46,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:33:46,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:33:46,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:33:46,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:33:46,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (1/1) ... [2020-08-19 03:33:46,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:33:46,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:33:46,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:33:46,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:33:46,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 03:33:46,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:33:46,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:33:46,836 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-19 03:33:46,837 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-19 03:33:46,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:33:46,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 03:33:46,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:33:46,837 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-19 03:33:46,837 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-19 03:33:46,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:33:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:33:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:33:47,058 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:33:47,058 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 03:33:47,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:33:47 BoogieIcfgContainer [2020-08-19 03:33:47,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:33:47,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:33:47,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:33:47,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:33:47,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:33:46" (1/3) ... [2020-08-19 03:33:47,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae71ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:33:47, skipping insertion in model container [2020-08-19 03:33:47,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:33:46" (2/3) ... [2020-08-19 03:33:47,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae71ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:33:47, skipping insertion in model container [2020-08-19 03:33:47,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:33:47" (3/3) ... [2020-08-19 03:33:47,072 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-08-19 03:33:47,103 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:33:47,124 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:33:47,165 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:33:47,211 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:33:47,211 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:33:47,211 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:33:47,212 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:33:47,212 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:33:47,212 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:33:47,212 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:33:47,212 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:33:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 03:33:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 03:33:47,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:47,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:47,240 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:47,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-19 03:33:47,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:47,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986639159] [2020-08-19 03:33:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:47,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:47,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:33:47,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986639159] [2020-08-19 03:33:47,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:33:47,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:33:47,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159238812] [2020-08-19 03:33:47,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:33:47,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:47,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:33:47,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:33:47,512 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-19 03:33:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:47,677 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-19 03:33:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:33:47,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 03:33:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:47,698 INFO L225 Difference]: With dead ends: 44 [2020-08-19 03:33:47,698 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 03:33:47,703 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 [2020-08-19 03:33:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 03:33:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 03:33:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 03:33:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 03:33:47,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-19 03:33:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:47,779 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 03:33:47,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:33:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 03:33:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 03:33:47,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:47,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:47,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:33:47,785 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-19 03:33:47,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:47,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605927920] [2020-08-19 03:33:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:47,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:47,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:33:47,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605927920] [2020-08-19 03:33:47,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:33:47,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:33:47,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582699799] [2020-08-19 03:33:47,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:33:47,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:47,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:33:47,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:33:47,858 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-19 03:33:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:47,925 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-19 03:33:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:33:47,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 03:33:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:47,928 INFO L225 Difference]: With dead ends: 36 [2020-08-19 03:33:47,928 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 03:33:47,929 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 [2020-08-19 03:33:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 03:33:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 03:33:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 03:33:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 03:33:47,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-19 03:33:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:47,940 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 03:33:47,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:33:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 03:33:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 03:33:47,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:47,942 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] [2020-08-19 03:33:47,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:33:47,943 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:47,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-19 03:33:47,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:47,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020008229] [2020-08-19 03:33:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:47,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:47,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 03:33:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:33:48,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020008229] [2020-08-19 03:33:48,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:48,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 03:33:48,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577354449] [2020-08-19 03:33:48,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 03:33:48,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 03:33:48,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 03:33:48,074 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-19 03:33:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:48,164 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-19 03:33:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 03:33:48,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 03:33:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:48,167 INFO L225 Difference]: With dead ends: 58 [2020-08-19 03:33:48,167 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 03:33:48,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:33:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 03:33:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-19 03:33:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 03:33:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-19 03:33:48,178 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-19 03:33:48,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:48,179 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-19 03:33:48,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 03:33:48,179 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-19 03:33:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:33:48,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:48,181 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] [2020-08-19 03:33:48,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:33:48,182 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-19 03:33:48,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:48,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107819616] [2020-08-19 03:33:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:33:48,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107819616] [2020-08-19 03:33:48,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:48,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 03:33:48,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369854986] [2020-08-19 03:33:48,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 03:33:48,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:48,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 03:33:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 03:33:48,303 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-19 03:33:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:48,531 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-19 03:33:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 03:33:48,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-19 03:33:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:48,536 INFO L225 Difference]: With dead ends: 54 [2020-08-19 03:33:48,536 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 03:33:48,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:33:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 03:33:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-19 03:33:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 03:33:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-19 03:33:48,551 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-19 03:33:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:48,551 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-19 03:33:48,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 03:33:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-19 03:33:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 03:33:48,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:48,554 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] [2020-08-19 03:33:48,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:33:48,555 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:48,555 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-19 03:33:48,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:48,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575927544] [2020-08-19 03:33:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 03:33:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 03:33:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 03:33:48,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575927544] [2020-08-19 03:33:48,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:48,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 03:33:48,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132421958] [2020-08-19 03:33:48,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 03:33:48,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 03:33:48,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:33:48,678 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-19 03:33:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:48,757 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-19 03:33:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 03:33:48,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-19 03:33:48,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:48,760 INFO L225 Difference]: With dead ends: 94 [2020-08-19 03:33:48,760 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 03:33:48,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 03:33:48,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 03:33:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-19 03:33:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 03:33:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-19 03:33:48,774 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-19 03:33:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:48,774 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-19 03:33:48,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 03:33:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-19 03:33:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 03:33:48,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:48,777 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] [2020-08-19 03:33:48,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:33:48,777 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-19 03:33:48,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:48,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698314019] [2020-08-19 03:33:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:48,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-19 03:33:49,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698314019] [2020-08-19 03:33:49,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:49,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 03:33:49,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735590938] [2020-08-19 03:33:49,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 03:33:49,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:49,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 03:33:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:33:49,009 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-19 03:33:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:49,126 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-19 03:33:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 03:33:49,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 03:33:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:49,129 INFO L225 Difference]: With dead ends: 103 [2020-08-19 03:33:49,129 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 03:33:49,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:33:49,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 03:33:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 03:33:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 03:33:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-19 03:33:49,141 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-19 03:33:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:49,142 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-19 03:33:49,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 03:33:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-19 03:33:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 03:33:49,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:49,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:49,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:33:49,145 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-19 03:33:49,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:49,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650820554] [2020-08-19 03:33:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 03:33:49,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650820554] [2020-08-19 03:33:49,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:49,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 03:33:49,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505473485] [2020-08-19 03:33:49,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 03:33:49,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:49,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 03:33:49,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:33:49,260 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-19 03:33:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:49,454 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-19 03:33:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 03:33:49,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-19 03:33:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:49,457 INFO L225 Difference]: With dead ends: 86 [2020-08-19 03:33:49,457 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 03:33:49,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-19 03:33:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 03:33:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-19 03:33:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 03:33:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-19 03:33:49,473 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-19 03:33:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:49,474 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-19 03:33:49,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 03:33:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-19 03:33:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 03:33:49,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:49,477 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] [2020-08-19 03:33:49,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:33:49,477 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:49,478 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-19 03:33:49,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:49,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185968986] [2020-08-19 03:33:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 03:33:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-19 03:33:49,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185968986] [2020-08-19 03:33:49,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:49,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 03:33:49,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672419719] [2020-08-19 03:33:49,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 03:33:49,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 03:33:49,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:33:49,617 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-19 03:33:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:49,743 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-19 03:33:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 03:33:49,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-19 03:33:49,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:49,746 INFO L225 Difference]: With dead ends: 167 [2020-08-19 03:33:49,746 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 03:33:49,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:33:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 03:33:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-19 03:33:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 03:33:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-19 03:33:49,772 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-19 03:33:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:49,773 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-19 03:33:49,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 03:33:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-19 03:33:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 03:33:49,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:49,778 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:49,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:33:49,778 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-19 03:33:49,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:49,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564353221] [2020-08-19 03:33:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 03:33:49,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564353221] [2020-08-19 03:33:49,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:49,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 03:33:49,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367490013] [2020-08-19 03:33:49,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:33:49,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:33:49,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:33:49,980 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-19 03:33:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:50,208 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-19 03:33:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 03:33:50,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-19 03:33:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:50,229 INFO L225 Difference]: With dead ends: 188 [2020-08-19 03:33:50,230 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 03:33:50,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-19 03:33:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 03:33:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-19 03:33:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 03:33:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-19 03:33:50,256 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-19 03:33:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:50,257 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-19 03:33:50,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:33:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-19 03:33:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 03:33:50,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:50,259 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:50,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 03:33:50,260 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-19 03:33:50,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:50,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233716408] [2020-08-19 03:33:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-19 03:33:50,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233716408] [2020-08-19 03:33:50,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:50,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 03:33:50,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014438278] [2020-08-19 03:33:50,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 03:33:50,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 03:33:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 03:33:50,486 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-19 03:33:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:50,939 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-19 03:33:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 03:33:50,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-19 03:33:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:50,944 INFO L225 Difference]: With dead ends: 199 [2020-08-19 03:33:50,944 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 03:33:50,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-19 03:33:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 03:33:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-19 03:33:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 03:33:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-19 03:33:50,958 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-19 03:33:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:50,959 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-19 03:33:50,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 03:33:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-19 03:33:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 03:33:50,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:50,961 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:50,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 03:33:50,961 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:50,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-19 03:33:50,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:50,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523550242] [2020-08-19 03:33:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:50,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 03:33:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-19 03:33:51,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523550242] [2020-08-19 03:33:51,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:51,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 03:33:51,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844367264] [2020-08-19 03:33:51,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 03:33:51,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:51,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 03:33:51,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 03:33:51,175 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-19 03:33:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:51,369 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-19 03:33:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 03:33:51,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-19 03:33:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:51,371 INFO L225 Difference]: With dead ends: 142 [2020-08-19 03:33:51,371 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 03:33:51,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-19 03:33:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 03:33:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-19 03:33:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 03:33:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-19 03:33:51,379 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-19 03:33:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:51,380 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-19 03:33:51,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 03:33:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-19 03:33:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-19 03:33:51,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:51,382 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:51,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 03:33:51,382 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:51,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-19 03:33:51,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:51,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096942520] [2020-08-19 03:33:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 03:33:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 03:33:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 03:33:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-08-19 03:33:51,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096942520] [2020-08-19 03:33:51,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:51,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 03:33:51,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703498826] [2020-08-19 03:33:51,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 03:33:51,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:51,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 03:33:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:33:51,901 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states. [2020-08-19 03:33:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:52,584 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2020-08-19 03:33:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 03:33:52,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192 [2020-08-19 03:33:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:52,586 INFO L225 Difference]: With dead ends: 184 [2020-08-19 03:33:52,587 INFO L226 Difference]: Without dead ends: 111 [2020-08-19 03:33:52,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-08-19 03:33:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-19 03:33:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-19 03:33:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-19 03:33:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-19 03:33:52,602 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192 [2020-08-19 03:33:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:52,603 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-19 03:33:52,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 03:33:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-19 03:33:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-19 03:33:52,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:52,610 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:52,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 03:33:52,611 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:52,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:52,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times [2020-08-19 03:33:52,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:52,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738926329] [2020-08-19 03:33:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 03:33:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 03:33:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-08-19 03:33:52,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738926329] [2020-08-19 03:33:52,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:52,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 03:33:52,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970674394] [2020-08-19 03:33:52,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 03:33:52,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:52,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 03:33:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 03:33:52,940 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2020-08-19 03:33:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:53,202 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions. [2020-08-19 03:33:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 03:33:53,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-19 03:33:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:53,204 INFO L225 Difference]: With dead ends: 188 [2020-08-19 03:33:53,204 INFO L226 Difference]: Without dead ends: 101 [2020-08-19 03:33:53,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-19 03:33:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-19 03:33:53,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-08-19 03:33:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-19 03:33:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-19 03:33:53,214 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136 [2020-08-19 03:33:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:53,215 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-19 03:33:53,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 03:33:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-19 03:33:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-19 03:33:53,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:53,218 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:53,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 03:33:53,219 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-08-19 03:33:53,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:53,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451088996] [2020-08-19 03:33:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 03:33:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-19 03:33:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-08-19 03:33:53,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451088996] [2020-08-19 03:33:53,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:53,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 03:33:53,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272999870] [2020-08-19 03:33:53,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 03:33:53,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:53,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 03:33:53,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-19 03:33:53,680 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states. [2020-08-19 03:33:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:54,212 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions. [2020-08-19 03:33:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 03:33:54,213 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-08-19 03:33:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:54,215 INFO L225 Difference]: With dead ends: 217 [2020-08-19 03:33:54,215 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 03:33:54,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-19 03:33:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 03:33:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-08-19 03:33:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 03:33:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-08-19 03:33:54,233 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177 [2020-08-19 03:33:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:54,233 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-08-19 03:33:54,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 03:33:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-08-19 03:33:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 03:33:54,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:54,236 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] [2020-08-19 03:33:54,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 03:33:54,236 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2020-08-19 03:33:54,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:54,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957697160] [2020-08-19 03:33:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:33:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 03:33:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 03:33:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 03:33:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 03:33:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 03:33:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-08-19 03:33:54,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957697160] [2020-08-19 03:33:54,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:54,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 03:33:54,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35672929] [2020-08-19 03:33:54,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 03:33:54,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 03:33:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-19 03:33:54,636 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states. [2020-08-19 03:33:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:55,068 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2020-08-19 03:33:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 03:33:55,069 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-19 03:33:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:55,071 INFO L225 Difference]: With dead ends: 211 [2020-08-19 03:33:55,071 INFO L226 Difference]: Without dead ends: 114 [2020-08-19 03:33:55,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-19 03:33:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-19 03:33:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-08-19 03:33:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-19 03:33:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2020-08-19 03:33:55,081 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150 [2020-08-19 03:33:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:55,082 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2020-08-19 03:33:55,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 03:33:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2020-08-19 03:33:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-19 03:33:55,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:55,084 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] [2020-08-19 03:33:55,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 03:33:55,085 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-08-19 03:33:55,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:55,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054312280] [2020-08-19 03:33:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 03:33:55,112 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 03:33:55,112 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 03:33:55,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 03:33:55,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:33:55 BoogieIcfgContainer [2020-08-19 03:33:55,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:33:55,146 INFO L168 Benchmark]: Toolchain (without parser) took 8730.68 ms. Allocated memory was 141.0 MB in the beginning and 340.8 MB in the end (delta: 199.8 MB). Free memory was 104.7 MB in the beginning and 99.9 MB in the end (delta: 4.8 MB). Peak memory consumption was 204.6 MB. Max. memory is 7.1 GB. [2020-08-19 03:33:55,146 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 03:33:55,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.79 ms. Allocated memory is still 141.0 MB. Free memory was 104.3 MB in the beginning and 94.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 03:33:55,148 INFO L168 Benchmark]: Boogie Preprocessor took 112.22 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 182.2 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:33:55,148 INFO L168 Benchmark]: RCFGBuilder took 293.58 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 169.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-19 03:33:55,149 INFO L168 Benchmark]: TraceAbstraction took 8079.28 ms. Allocated memory was 203.4 MB in the beginning and 340.8 MB in the end (delta: 137.4 MB). Free memory was 168.4 MB in the beginning and 99.9 MB in the end (delta: 68.5 MB). Peak memory consumption was 205.9 MB. Max. memory is 7.1 GB. [2020-08-19 03:33:55,152 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.79 ms. Allocated memory is still 141.0 MB. Free memory was 104.3 MB in the beginning and 94.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.22 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 182.2 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 293.58 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 169.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8079.28 ms. Allocated memory was 203.4 MB in the beginning and 340.8 MB in the end (delta: 137.4 MB). Free memory was 168.4 MB in the beginning and 99.9 MB in the end (delta: 68.5 MB). Peak memory consumption was 205.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 8 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.9s, OverallIterations: 16, TraceHistogramMax: 17, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 472 SDslu, 2192 SDs, 0 SdLazy, 2654 SolverSat, 328 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 77 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 1333 NumberOfCodeBlocks, 1333 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1141 ConstructedInterpolants, 0 QuantifiedInterpolants, 236129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 2308/3324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...