/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:19:15,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 00:19:15,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 00:19:15,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 00:19:15,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 00:19:15,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 00:19:15,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 00:19:15,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 00:19:15,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 00:19:15,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 00:19:15,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 00:19:15,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 00:19:15,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:19:15,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:19:15,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:19:15,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:19:15,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:19:15,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:19:15,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:19:15,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:19:15,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:19:15,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:19:15,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:19:15,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:19:15,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 00:19:15,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 00:19:15,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 00:19:15,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 00:19:15,688 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 00:19:15,711 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:19:15,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:19:15,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:19:15,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:19:15,713 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:19:15,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:19:15,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:19:15,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:19:15,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:19:15,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:19:15,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:19:15,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:19:15,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:19:15,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:19:15,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:19:15,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:19:15,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:19:15,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:19:15,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:19:15,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:19:15,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:19:15,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:19:15,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:19:15,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:19:15,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:19:15,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:19:15,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:19:15,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:19:15,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:19:15,718 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=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:19:16,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:19:16,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:19:16,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:19:16,095 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:19:16,095 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:19:16,096 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-08-19 00:19:16,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ce84ee07/82bb16ba87894543ae5a07be359390f4/FLAG70f4b832d [2020-08-19 00:19:16,712 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:19:16,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-08-19 00:19:16,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ce84ee07/82bb16ba87894543ae5a07be359390f4/FLAG70f4b832d [2020-08-19 00:19:17,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ce84ee07/82bb16ba87894543ae5a07be359390f4 [2020-08-19 00:19:17,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:19:17,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:19:17,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:19:17,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:19:17,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:19:17,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635b9b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17, skipping insertion in model container [2020-08-19 00:19:17,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:19:17,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:19:17,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:19:17,385 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:19:17,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:19:17,417 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:19:17,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17 WrapperNode [2020-08-19 00:19:17,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:19:17,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:19:17,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:19:17,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:19:17,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (1/1) ... [2020-08-19 00:19:17,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:19:17,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:19:17,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:19:17,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:19:17,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (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 00:19:17,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:19:17,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:19:17,606 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-19 00:19:17,606 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-19 00:19:17,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:19:17,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 00:19:17,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:19:17,607 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-19 00:19:17,607 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-19 00:19:17,607 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:19:17,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:19:17,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:19:17,813 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:19:17,814 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 00:19:17,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:19:17 BoogieIcfgContainer [2020-08-19 00:19:17,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:19:17,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:19:17,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:19:17,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:19:17,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:19:17" (1/3) ... [2020-08-19 00:19:17,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b94d8c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:19:17, skipping insertion in model container [2020-08-19 00:19:17,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:17" (2/3) ... [2020-08-19 00:19:17,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b94d8c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:19:17, skipping insertion in model container [2020-08-19 00:19:17,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:19:17" (3/3) ... [2020-08-19 00:19:17,829 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-08-19 00:19:17,848 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:19:17,857 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:19:17,875 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:19:17,913 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:19:17,913 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:19:17,914 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:19:17,914 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:19:17,914 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:19:17,915 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:19:17,915 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:19:17,915 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:19:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 00:19:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 00:19:17,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:17,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:17,956 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-19 00:19:17,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:17,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4710311] [2020-08-19 00:19:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,251 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 00:19:18,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4710311] [2020-08-19 00:19:18,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:19:18,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 00:19:18,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945782782] [2020-08-19 00:19:18,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:19:18,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:19:18,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:19:18,282 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-19 00:19:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:18,386 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-19 00:19:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:19:18,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 00:19:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:18,401 INFO L225 Difference]: With dead ends: 44 [2020-08-19 00:19:18,401 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 00:19:18,405 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 00:19:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 00:19:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 00:19:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 00:19:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 00:19:18,459 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-19 00:19:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:18,460 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 00:19:18,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:19:18,460 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 00:19:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 00:19:18,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:18,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:18,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:19:18,463 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-19 00:19:18,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:18,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054401564] [2020-08-19 00:19:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,536 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 00:19:18,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054401564] [2020-08-19 00:19:18,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:19:18,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 00:19:18,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648829435] [2020-08-19 00:19:18,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:19:18,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:18,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:19:18,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:19:18,541 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-19 00:19:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:18,623 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-19 00:19:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:19:18,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 00:19:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:18,625 INFO L225 Difference]: With dead ends: 36 [2020-08-19 00:19:18,626 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 00:19:18,627 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 00:19:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 00:19:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 00:19:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 00:19:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 00:19:18,638 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-19 00:19:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:18,638 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 00:19:18,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:19:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 00:19:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 00:19:18,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:18,640 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 00:19:18,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:19:18,641 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:18,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-19 00:19:18,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:18,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962064525] [2020-08-19 00:19:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 00:19:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:18,813 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 00:19:18,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962064525] [2020-08-19 00:19:18,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:18,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:19:18,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134468520] [2020-08-19 00:19:18,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:19:18,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:18,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:19:18,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:19:18,816 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-19 00:19:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:18,948 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-19 00:19:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 00:19:18,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 00:19:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:18,951 INFO L225 Difference]: With dead ends: 58 [2020-08-19 00:19:18,951 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 00:19:18,956 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 00:19:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 00:19:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-19 00:19:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 00:19:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-19 00:19:18,980 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-19 00:19:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:18,982 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-19 00:19:18,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:19:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-19 00:19:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 00:19:18,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:18,987 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 00:19:18,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:19:18,990 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:18,990 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-19 00:19:18,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:18,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108451798] [2020-08-19 00:19:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,155 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 00:19:19,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108451798] [2020-08-19 00:19:19,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:19,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:19:19,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749764943] [2020-08-19 00:19:19,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:19:19,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:19,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:19:19,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:19:19,159 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-19 00:19:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:19,347 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-19 00:19:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:19:19,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-19 00:19:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:19,351 INFO L225 Difference]: With dead ends: 54 [2020-08-19 00:19:19,352 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 00:19:19,353 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 00:19:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 00:19:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-19 00:19:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 00:19:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-19 00:19:19,367 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-19 00:19:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:19,368 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-19 00:19:19,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:19:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-19 00:19:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 00:19:19,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:19,370 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 00:19:19,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:19:19,371 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-19 00:19:19,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:19,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659609314] [2020-08-19 00:19:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 00:19:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 00:19:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,485 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 00:19:19,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659609314] [2020-08-19 00:19:19,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:19,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 00:19:19,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114516118] [2020-08-19 00:19:19,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 00:19:19,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:19,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 00:19:19,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:19:19,488 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-19 00:19:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:19,563 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-19 00:19:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 00:19:19,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-19 00:19:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:19,566 INFO L225 Difference]: With dead ends: 94 [2020-08-19 00:19:19,566 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 00:19:19,568 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 00:19:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 00:19:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-19 00:19:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 00:19:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-19 00:19:19,581 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-19 00:19:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:19,582 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-19 00:19:19,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 00:19:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-19 00:19:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 00:19:19,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:19,584 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 00:19:19,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:19:19,585 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-19 00:19:19,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:19,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989937267] [2020-08-19 00:19:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:19,796 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 00:19:19,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989937267] [2020-08-19 00:19:19,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:19,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 00:19:19,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207164847] [2020-08-19 00:19:19,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:19:19,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:19,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:19:19,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:19:19,799 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-19 00:19:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:19,950 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-19 00:19:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 00:19:19,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 00:19:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:19,960 INFO L225 Difference]: With dead ends: 103 [2020-08-19 00:19:19,960 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 00:19:19,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 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 00:19:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 00:19:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 00:19:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 00:19:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-19 00:19:19,983 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-19 00:19:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:19,984 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-19 00:19:19,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:19:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-19 00:19:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 00:19:19,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:19,987 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 00:19:19,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:19:19,987 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-19 00:19:19,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:19,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958997478] [2020-08-19 00:19:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,107 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 00:19:20,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958997478] [2020-08-19 00:19:20,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:20,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 00:19:20,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37220295] [2020-08-19 00:19:20,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:19:20,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:19:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:19:20,110 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-19 00:19:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:20,318 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-19 00:19:20,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:19:20,319 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-19 00:19:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:20,321 INFO L225 Difference]: With dead ends: 86 [2020-08-19 00:19:20,322 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 00:19:20,323 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 00:19:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 00:19:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-19 00:19:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 00:19:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-19 00:19:20,341 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-19 00:19:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:20,342 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-19 00:19:20,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:19:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-19 00:19:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 00:19:20,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:20,346 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:20,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:19:20,347 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-19 00:19:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:20,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031456342] [2020-08-19 00:19:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 00:19:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,518 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 00:19:20,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031456342] [2020-08-19 00:19:20,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:20,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 00:19:20,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781320648] [2020-08-19 00:19:20,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:19:20,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:19:20,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:19:20,521 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-19 00:19:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:20,657 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-19 00:19:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:19:20,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-19 00:19:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:20,661 INFO L225 Difference]: With dead ends: 167 [2020-08-19 00:19:20,661 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 00:19:20,662 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 00:19:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 00:19:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-19 00:19:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 00:19:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-19 00:19:20,694 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-19 00:19:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:20,694 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-19 00:19:20,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:19:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-19 00:19:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 00:19:20,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:20,702 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 00:19:20,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:19:20,703 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-19 00:19:20,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:20,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092470438] [2020-08-19 00:19:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:20,948 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 00:19:20,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092470438] [2020-08-19 00:19:20,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:20,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:19:20,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047434650] [2020-08-19 00:19:20,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:19:20,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:19:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:19:20,954 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-19 00:19:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:21,237 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-19 00:19:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:19:21,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-19 00:19:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:21,243 INFO L225 Difference]: With dead ends: 188 [2020-08-19 00:19:21,243 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 00:19:21,245 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 00:19:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 00:19:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-19 00:19:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 00:19:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-19 00:19:21,279 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-19 00:19:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:21,280 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-19 00:19:21,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:19:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-19 00:19:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 00:19:21,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:21,283 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 00:19:21,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:19:21,283 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-19 00:19:21,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:21,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055593500] [2020-08-19 00:19:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:21,568 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 00:19:21,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055593500] [2020-08-19 00:19:21,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:21,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:19:21,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38834366] [2020-08-19 00:19:21,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:19:21,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:19:21,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:19:21,572 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-19 00:19:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:21,975 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-19 00:19:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 00:19:21,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-19 00:19:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:21,981 INFO L225 Difference]: With dead ends: 199 [2020-08-19 00:19:21,981 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 00:19:21,983 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 00:19:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 00:19:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-19 00:19:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 00:19:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-19 00:19:22,002 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-19 00:19:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:22,003 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-19 00:19:22,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:19:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-19 00:19:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 00:19:22,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:22,005 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 00:19:22,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:19:22,005 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:22,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-19 00:19:22,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:22,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960017984] [2020-08-19 00:19:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 00:19:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,379 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 00:19:22,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960017984] [2020-08-19 00:19:22,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:22,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:19:22,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118003963] [2020-08-19 00:19:22,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:19:22,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:19:22,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:19:22,387 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-19 00:19:22,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:22,582 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-19 00:19:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 00:19:22,583 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-19 00:19:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:22,585 INFO L225 Difference]: With dead ends: 142 [2020-08-19 00:19:22,585 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 00:19:22,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 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 00:19:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 00:19:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-19 00:19:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 00:19:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-19 00:19:22,603 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-19 00:19:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:22,603 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-19 00:19:22,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:19:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-19 00:19:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-19 00:19:22,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:22,614 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 00:19:22,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:19:22,614 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-19 00:19:22,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:22,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207608727] [2020-08-19 00:19:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:22,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 00:19:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 00:19:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 00:19:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 98 proven. 322 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2020-08-19 00:19:23,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207608727] [2020-08-19 00:19:23,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:23,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:19:23,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088179889] [2020-08-19 00:19:23,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:19:23,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:23,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:19:23,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:19:23,257 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 12 states. [2020-08-19 00:19:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:23,608 INFO L93 Difference]: Finished difference Result 178 states and 263 transitions. [2020-08-19 00:19:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 00:19:23,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2020-08-19 00:19:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:23,611 INFO L225 Difference]: With dead ends: 178 [2020-08-19 00:19:23,611 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 00:19:23,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:19:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 00:19:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-08-19 00:19:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 00:19:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-08-19 00:19:23,621 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 192 [2020-08-19 00:19:23,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:23,621 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-08-19 00:19:23,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:19:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-08-19 00:19:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-19 00:19:23,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:23,624 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:23,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:19:23,624 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:23,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1677699577, now seen corresponding path program 1 times [2020-08-19 00:19:23,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:23,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294732029] [2020-08-19 00:19:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:19:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 77 proven. 26 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-08-19 00:19:23,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294732029] [2020-08-19 00:19:23,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:23,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 00:19:23,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576454301] [2020-08-19 00:19:23,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:19:23,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:23,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:19:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:19:23,854 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 11 states. [2020-08-19 00:19:24,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:24,145 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-08-19 00:19:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 00:19:24,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-08-19 00:19:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:24,148 INFO L225 Difference]: With dead ends: 172 [2020-08-19 00:19:24,148 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 00:19:24,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 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 00:19:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 00:19:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-08-19 00:19:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-19 00:19:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-08-19 00:19:24,161 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 96 [2020-08-19 00:19:24,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:24,162 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-08-19 00:19:24,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:19:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2020-08-19 00:19:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 00:19:24,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:24,164 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:24,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:19:24,165 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash 265701462, now seen corresponding path program 2 times [2020-08-19 00:19:24,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:24,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750263861] [2020-08-19 00:19:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 00:19:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-19 00:19:24,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750263861] [2020-08-19 00:19:24,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:24,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:19:24,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823226169] [2020-08-19 00:19:24,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:19:24,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:19:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:19:24,445 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 12 states. [2020-08-19 00:19:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:24,830 INFO L93 Difference]: Finished difference Result 185 states and 262 transitions. [2020-08-19 00:19:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 00:19:24,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-08-19 00:19:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:24,833 INFO L225 Difference]: With dead ends: 185 [2020-08-19 00:19:24,834 INFO L226 Difference]: Without dead ends: 104 [2020-08-19 00:19:24,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:19:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-19 00:19:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-08-19 00:19:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 00:19:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2020-08-19 00:19:24,845 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 110 [2020-08-19 00:19:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:24,846 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2020-08-19 00:19:24,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:19:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2020-08-19 00:19:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 00:19:24,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:24,848 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:24,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:19:24,849 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-08-19 00:19:24,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:24,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213907344] [2020-08-19 00:19:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:24,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:19:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-08-19 00:19:25,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213907344] [2020-08-19 00:19:25,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:25,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 00:19:25,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001832123] [2020-08-19 00:19:25,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 00:19:25,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:25,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 00:19:25,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-19 00:19:25,487 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand 22 states. [2020-08-19 00:19:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:25,867 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2020-08-19 00:19:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 00:19:25,867 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-08-19 00:19:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:25,869 INFO L225 Difference]: With dead ends: 105 [2020-08-19 00:19:25,870 INFO L226 Difference]: Without dead ends: 101 [2020-08-19 00:19:25,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-08-19 00:19:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-19 00:19:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-08-19 00:19:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-19 00:19:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2020-08-19 00:19:25,889 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 109 [2020-08-19 00:19:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:25,889 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2020-08-19 00:19:25,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 00:19:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2020-08-19 00:19:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 00:19:25,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:25,892 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, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:25,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 00:19:25,893 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1650675485, now seen corresponding path program 4 times [2020-08-19 00:19:25,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:25,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592895254] [2020-08-19 00:19:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:25,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:19:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 94 proven. 190 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-19 00:19:26,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592895254] [2020-08-19 00:19:26,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:26,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 00:19:26,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912045803] [2020-08-19 00:19:26,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 00:19:26,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 00:19:26,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-19 00:19:26,311 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 14 states. [2020-08-19 00:19:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:26,871 INFO L93 Difference]: Finished difference Result 208 states and 318 transitions. [2020-08-19 00:19:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 00:19:26,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-19 00:19:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:26,874 INFO L225 Difference]: With dead ends: 208 [2020-08-19 00:19:26,874 INFO L226 Difference]: Without dead ends: 113 [2020-08-19 00:19:26,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-19 00:19:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-19 00:19:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2020-08-19 00:19:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 00:19:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-08-19 00:19:26,887 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 150 [2020-08-19 00:19:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:26,888 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-08-19 00:19:26,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 00:19:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-08-19 00:19:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-19 00:19:26,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:26,891 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:26,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 00:19:26,892 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:26,892 INFO L82 PathProgramCache]: Analyzing trace with hash 215516676, now seen corresponding path program 5 times [2020-08-19 00:19:26,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:26,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820599079] [2020-08-19 00:19:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:26,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:19:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 00:19:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:19:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 119 proven. 187 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2020-08-19 00:19:27,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820599079] [2020-08-19 00:19:27,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:27,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 00:19:27,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038131966] [2020-08-19 00:19:27,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:19:27,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:19:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:19:27,383 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 11 states. [2020-08-19 00:19:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:27,655 INFO L93 Difference]: Finished difference Result 199 states and 275 transitions. [2020-08-19 00:19:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 00:19:27,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 190 [2020-08-19 00:19:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:27,658 INFO L225 Difference]: With dead ends: 199 [2020-08-19 00:19:27,659 INFO L226 Difference]: Without dead ends: 108 [2020-08-19 00:19:27,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 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 00:19:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-19 00:19:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-08-19 00:19:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-19 00:19:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2020-08-19 00:19:27,676 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 190 [2020-08-19 00:19:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:27,677 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2020-08-19 00:19:27,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:19:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2020-08-19 00:19:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 00:19:27,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:27,680 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 00:19:27,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 00:19:27,680 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 6 times [2020-08-19 00:19:27,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:27,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246540576] [2020-08-19 00:19:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:19:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:19:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:27,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:28,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:28,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 00:19:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:28,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:28,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:19:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:28,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 00:19:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:28,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 00:19:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 156 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-08-19 00:19:28,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246540576] [2020-08-19 00:19:28,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:28,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 00:19:28,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553672399] [2020-08-19 00:19:28,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:19:28,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:28,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:19:28,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:19:28,071 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand 11 states. [2020-08-19 00:19:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:28,395 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2020-08-19 00:19:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 00:19:28,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 150 [2020-08-19 00:19:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:28,396 INFO L225 Difference]: With dead ends: 123 [2020-08-19 00:19:28,396 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 00:19:28,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-08-19 00:19:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 00:19:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 00:19:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 00:19:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 00:19:28,399 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 150 [2020-08-19 00:19:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:28,399 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 00:19:28,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:19:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 00:19:28,400 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 00:19:28,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 00:19:28,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 00:19:29,260 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2020-08-19 00:19:29,683 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 24 [2020-08-19 00:19:29,687 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 00:19:29,687 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 00:19:29,687 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 00:19:29,688 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 00:19:29,688 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 00:19:29,688 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 00:19:29,688 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-19 00:19:29,688 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-19 00:19:29,689 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-19 00:19:29,689 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-19 00:19:29,689 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-19 00:19:29,689 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-19 00:19:29,689 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-19 00:19:29,690 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-19 00:19:29,690 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-19 00:19:29,690 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-19 00:19:29,690 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-19 00:19:29,690 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-19 00:19:29,691 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|)) (.cse1 (<= |fibo2_#in~n| 2))) (and (or (and .cse0 (<= 5 fibo2_~n)) (and (<= 4 fibo2_~n) (<= 2 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 2) .cse0) .cse1) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|)) (not .cse1)))) [2020-08-19 00:19:29,691 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-19 00:19:29,691 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-19 00:19:29,691 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-19 00:19:29,691 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-19 00:19:29,691 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-19 00:19:29,691 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-19 00:19:29,692 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (= fibo1_~n |fibo1_#in~n|)) [2020-08-19 00:19:29,692 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-19 00:19:29,692 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 |fibo1_#in~n|)) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#t~ret0|) .cse0 (<= |fibo1_#t~ret0| 3)) (and .cse0 (<= 6 |fibo1_#in~n|)) (and (<= fibo1_~n 4) .cse0)))) [2020-08-19 00:19:29,692 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-19 00:19:29,692 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-19 00:19:29,692 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-19 00:19:29,692 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-19 00:19:29,693 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-19 00:19:29,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 12:19:29 BoogieIcfgContainer [2020-08-19 00:19:29,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 00:19:29,701 INFO L168 Benchmark]: Toolchain (without parser) took 12614.05 ms. Allocated memory was 138.4 MB in the beginning and 415.8 MB in the end (delta: 277.3 MB). Free memory was 101.9 MB in the beginning and 354.4 MB in the end (delta: -252.4 MB). Peak memory consumption was 290.2 MB. Max. memory is 7.1 GB. [2020-08-19 00:19:29,702 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 00:19:29,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.93 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 92.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-19 00:19:29,703 INFO L168 Benchmark]: Boogie Preprocessor took 121.77 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 179.4 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-19 00:19:29,704 INFO L168 Benchmark]: RCFGBuilder took 278.02 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 166.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-19 00:19:29,704 INFO L168 Benchmark]: TraceAbstraction took 11878.58 ms. Allocated memory was 200.8 MB in the beginning and 415.8 MB in the end (delta: 215.0 MB). Free memory was 165.6 MB in the beginning and 354.4 MB in the end (delta: -188.7 MB). Peak memory consumption was 291.5 MB. Max. memory is 7.1 GB. [2020-08-19 00:19:29,707 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.93 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 92.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.77 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 179.4 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.02 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 166.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11878.58 ms. Allocated memory was 200.8 MB in the beginning and 415.8 MB in the end (delta: 215.0 MB). Free memory was 165.6 MB in the beginning and 354.4 MB in the end (delta: -188.7 MB). Peak memory consumption was 291.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.4s, OverallIterations: 18, TraceHistogramMax: 17, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 567 SDtfs, 507 SDslu, 3387 SDs, 0 SdLazy, 3114 SolverSat, 337 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 724 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 545 PreInvPairs, 724 NumberOfFragments, 111 HoareAnnotationTreeSize, 545 FomulaSimplifications, 2493 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3928 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1498 NumberOfCodeBlocks, 1498 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1480 ConstructedInterpolants, 0 QuantifiedInterpolants, 311578 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 3047/4287 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...