/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:25:11,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:25:11,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:25:11,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:25:11,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:25:11,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:25:11,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:25:11,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:25:11,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:25:11,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:25:11,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:25:11,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:25:11,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:25:11,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:25:11,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:25:11,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:25:11,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:25:11,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:25:11,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:25:11,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:25:11,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:25:11,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:25:11,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:25:11,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:25:11,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 11:25:11,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:25:11,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:25:11,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:25:11,873 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 [2020-08-18 11:25:11,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:25:11,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:25:11,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:25:11,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:25:11,920 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:25:11,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:25:11,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:25:11,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:25:11,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:25:11,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:25:11,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:25:11,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:25:11,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:25:11,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:25:11,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:25:11,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:25:11,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:25:11,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:25:11,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:25:11,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:25:11,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:25:11,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:25:11,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:25:11,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:25:11,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:25:11,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:25:11,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:25:11,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:25:11,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:25:11,927 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 [2020-08-18 11:25:12,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:25:12,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:25:12,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:25:12,252 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:25:12,252 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:25:12,253 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-08-18 11:25:12,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6eb14ecda/2a566bceeb2b48cf9421659abc4a153d/FLAG5566eb03c [2020-08-18 11:25:12,867 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:25:12,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-08-18 11:25:12,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6eb14ecda/2a566bceeb2b48cf9421659abc4a153d/FLAG5566eb03c [2020-08-18 11:25:13,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6eb14ecda/2a566bceeb2b48cf9421659abc4a153d [2020-08-18 11:25:13,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:25:13,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:25:13,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:25:13,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:25:13,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:25:13,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:25:13" (1/1) ... [2020-08-18 11:25:13,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f14d527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:13, skipping insertion in model container [2020-08-18 11:25:13,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:25:13" (1/1) ... [2020-08-18 11:25:13,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:25:13,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:25:13,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:25:13,636 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:25:14,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:25:14,035 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:25:14,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14 WrapperNode [2020-08-18 11:25:14,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:25:14,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:25:14,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:25:14,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:25:14,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (1/1) ... [2020-08-18 11:25:14,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (1/1) ... [2020-08-18 11:25:14,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (1/1) ... [2020-08-18 11:25:14,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (1/1) ... [2020-08-18 11:25:14,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (1/1) ... [2020-08-18 11:25:14,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (1/1) ... [2020-08-18 11:25:14,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (1/1) ... [2020-08-18 11:25:14,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:25:14,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:25:14,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:25:14,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:25:14,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (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 [2020-08-18 11:25:14,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:25:14,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:25:14,335 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 11:25:14,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:25:14,335 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 11:25:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:25:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:25:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 11:25:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:25:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:25:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:25:15,959 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:25:15,960 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 11:25:15,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:25:15 BoogieIcfgContainer [2020-08-18 11:25:15,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:25:15,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:25:15,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:25:15,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:25:15,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:25:13" (1/3) ... [2020-08-18 11:25:15,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3450bfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:25:15, skipping insertion in model container [2020-08-18 11:25:15,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:14" (2/3) ... [2020-08-18 11:25:15,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3450bfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:25:15, skipping insertion in model container [2020-08-18 11:25:15,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:25:15" (3/3) ... [2020-08-18 11:25:15,976 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label36.c [2020-08-18 11:25:15,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:25:15,997 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:25:16,012 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:25:16,040 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:25:16,041 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:25:16,041 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:25:16,041 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:25:16,041 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:25:16,041 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:25:16,041 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:25:16,042 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:25:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 11:25:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 11:25:16,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:16,077 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-08-18 11:25:16,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash 406410443, now seen corresponding path program 1 times [2020-08-18 11:25:16,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:16,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676370020] [2020-08-18 11:25:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:16,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:25:16,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676370020] [2020-08-18 11:25:16,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:25:16,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:25:16,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081173116] [2020-08-18 11:25:16,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:25:16,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:16,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:25:16,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:25:16,535 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 11:25:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:19,433 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-18 11:25:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 11:25:19,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-18 11:25:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:19,474 INFO L225 Difference]: With dead ends: 886 [2020-08-18 11:25:19,474 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 11:25:19,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:25:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 11:25:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-18 11:25:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-18 11:25:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-18 11:25:19,613 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 54 [2020-08-18 11:25:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:19,614 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-18 11:25:19,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:25:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-18 11:25:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-18 11:25:19,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:19,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:19,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:25:19,624 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:19,625 INFO L82 PathProgramCache]: Analyzing trace with hash -724645666, now seen corresponding path program 1 times [2020-08-18 11:25:19,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:19,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80582255] [2020-08-18 11:25:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:19,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:19,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:25:19,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80582255] [2020-08-18 11:25:19,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:25:19,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:25:19,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126693714] [2020-08-18 11:25:19,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:25:19,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:25:19,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:25:19,991 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-18 11:25:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:21,925 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-18 11:25:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:25:21,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-08-18 11:25:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:21,936 INFO L225 Difference]: With dead ends: 1518 [2020-08-18 11:25:21,936 INFO L226 Difference]: Without dead ends: 964 [2020-08-18 11:25:21,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:25:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-18 11:25:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-18 11:25:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-18 11:25:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-18 11:25:22,017 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 148 [2020-08-18 11:25:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:22,020 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-18 11:25:22,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:25:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-18 11:25:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-08-18 11:25:22,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:22,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2020-08-18 11:25:22,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:25:22,039 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2026240930, now seen corresponding path program 1 times [2020-08-18 11:25:22,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:22,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478802958] [2020-08-18 11:25:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:22,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:22,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:25:22,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478802958] [2020-08-18 11:25:22,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:25:22,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:25:22,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84731312] [2020-08-18 11:25:22,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:25:22,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:25:22,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:25:22,548 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-18 11:25:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:24,496 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-18 11:25:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:25:24,503 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 194 [2020-08-18 11:25:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:24,514 INFO L225 Difference]: With dead ends: 2490 [2020-08-18 11:25:24,515 INFO L226 Difference]: Without dead ends: 1552 [2020-08-18 11:25:24,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:25:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-18 11:25:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-18 11:25:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-18 11:25:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-18 11:25:24,579 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 194 [2020-08-18 11:25:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:24,580 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-18 11:25:24,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:25:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-18 11:25:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-18 11:25:24,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:24,584 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:24,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:25:24,584 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1200176176, now seen corresponding path program 1 times [2020-08-18 11:25:24,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:24,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032992424] [2020-08-18 11:25:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:24,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:24,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:24,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 11:25:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 94 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 11:25:25,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032992424] [2020-08-18 11:25:25,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:25,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 11:25:25,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949559769] [2020-08-18 11:25:25,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:25:25,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:25:25,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:25:25,077 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-18 11:25:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:27,110 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-18 11:25:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:25:27,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 213 [2020-08-18 11:25:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:27,124 INFO L225 Difference]: With dead ends: 3412 [2020-08-18 11:25:27,124 INFO L226 Difference]: Without dead ends: 1900 [2020-08-18 11:25:27,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:25:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-18 11:25:27,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-18 11:25:27,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-18 11:25:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-18 11:25:27,201 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 213 [2020-08-18 11:25:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:27,202 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-18 11:25:27,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:25:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-18 11:25:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-08-18 11:25:27,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:27,208 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:27,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:25:27,209 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1683146711, now seen corresponding path program 1 times [2020-08-18 11:25:27,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:27,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139368249] [2020-08-18 11:25:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:27,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:27,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:27,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 11:25:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:27,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 11:25:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 175 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 11:25:27,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139368249] [2020-08-18 11:25:27,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:27,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:25:27,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171490859] [2020-08-18 11:25:27,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:25:27,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:25:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:25:27,888 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-18 11:25:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:30,482 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-18 11:25:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 11:25:30,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 297 [2020-08-18 11:25:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:30,494 INFO L225 Difference]: With dead ends: 3677 [2020-08-18 11:25:30,494 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 11:25:30,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-18 11:25:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 11:25:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-18 11:25:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 11:25:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-18 11:25:30,557 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 297 [2020-08-18 11:25:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:30,558 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-18 11:25:30,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:25:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-18 11:25:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-08-18 11:25:30,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:30,567 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:30,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:25:30,567 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:30,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:30,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1242283415, now seen corresponding path program 1 times [2020-08-18 11:25:30,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:30,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67532945] [2020-08-18 11:25:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:30,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:30,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:30,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:30,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:30,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-18 11:25:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 414 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-18 11:25:31,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67532945] [2020-08-18 11:25:31,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:31,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:25:31,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327970641] [2020-08-18 11:25:31,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:25:31,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:31,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:25:31,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:25:31,170 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-18 11:25:35,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:35,782 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-18 11:25:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 11:25:35,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 432 [2020-08-18 11:25:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:35,799 INFO L225 Difference]: With dead ends: 5238 [2020-08-18 11:25:35,799 INFO L226 Difference]: Without dead ends: 3356 [2020-08-18 11:25:35,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-08-18 11:25:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-18 11:25:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-18 11:25:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-18 11:25:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-18 11:25:35,872 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 432 [2020-08-18 11:25:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:35,872 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-18 11:25:35,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:25:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-18 11:25:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-08-18 11:25:35,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:35,886 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2020-08-18 11:25:35,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:25:35,886 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:35,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:35,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1681885400, now seen corresponding path program 1 times [2020-08-18 11:25:35,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:35,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216460909] [2020-08-18 11:25:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 11:25:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-18 11:25:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 638 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-18 11:25:37,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216460909] [2020-08-18 11:25:37,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:37,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:25:37,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354406862] [2020-08-18 11:25:37,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:25:37,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:25:37,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:25:37,094 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-18 11:25:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:40,205 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-18 11:25:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 11:25:40,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 552 [2020-08-18 11:25:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:40,222 INFO L225 Difference]: With dead ends: 5701 [2020-08-18 11:25:40,223 INFO L226 Difference]: Without dead ends: 3400 [2020-08-18 11:25:40,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-08-18 11:25:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-18 11:25:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-18 11:25:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-18 11:25:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3494 transitions. [2020-08-18 11:25:40,311 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3494 transitions. Word has length 552 [2020-08-18 11:25:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:40,312 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3494 transitions. [2020-08-18 11:25:40,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:25:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3494 transitions. [2020-08-18 11:25:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-08-18 11:25:40,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:40,341 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:40,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:25:40,342 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash 60264982, now seen corresponding path program 1 times [2020-08-18 11:25:40,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:40,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188017477] [2020-08-18 11:25:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:40,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:40,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:40,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:40,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-18 11:25:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 415 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-18 11:25:41,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188017477] [2020-08-18 11:25:41,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:41,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:25:41,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176678595] [2020-08-18 11:25:41,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:25:41,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:25:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:25:41,432 INFO L87 Difference]: Start difference. First operand 3174 states and 3494 transitions. Second operand 10 states. [2020-08-18 11:25:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:44,518 INFO L93 Difference]: Finished difference Result 5994 states and 6641 transitions. [2020-08-18 11:25:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 11:25:44,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 585 [2020-08-18 11:25:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:44,533 INFO L225 Difference]: With dead ends: 5994 [2020-08-18 11:25:44,533 INFO L226 Difference]: Without dead ends: 3192 [2020-08-18 11:25:44,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-18 11:25:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-18 11:25:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-18 11:25:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 11:25:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3485 transitions. [2020-08-18 11:25:44,617 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3485 transitions. Word has length 585 [2020-08-18 11:25:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:44,618 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3485 transitions. [2020-08-18 11:25:44,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:25:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3485 transitions. [2020-08-18 11:25:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2020-08-18 11:25:44,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:44,627 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:44,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:25:44,627 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash 762745801, now seen corresponding path program 2 times [2020-08-18 11:25:44,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:44,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187282187] [2020-08-18 11:25:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 11:25:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:45,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-18 11:25:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 579 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-18 11:25:46,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187282187] [2020-08-18 11:25:46,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:46,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:25:46,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149553340] [2020-08-18 11:25:46,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:25:46,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:25:46,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:25:46,140 INFO L87 Difference]: Start difference. First operand 3178 states and 3485 transitions. Second operand 9 states. [2020-08-18 11:25:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:48,593 INFO L93 Difference]: Finished difference Result 6354 states and 6980 transitions. [2020-08-18 11:25:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 11:25:48,593 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 695 [2020-08-18 11:25:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:48,607 INFO L225 Difference]: With dead ends: 6354 [2020-08-18 11:25:48,607 INFO L226 Difference]: Without dead ends: 3364 [2020-08-18 11:25:48,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:25:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-18 11:25:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-18 11:25:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 11:25:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3483 transitions. [2020-08-18 11:25:48,681 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3483 transitions. Word has length 695 [2020-08-18 11:25:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:48,682 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3483 transitions. [2020-08-18 11:25:48,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:25:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3483 transitions. [2020-08-18 11:25:48,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2020-08-18 11:25:48,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:48,690 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:48,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:25:48,690 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:48,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:48,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1185073778, now seen corresponding path program 1 times [2020-08-18 11:25:48,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:48,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243659269] [2020-08-18 11:25:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:48,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:48,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:48,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:48,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:48,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:25:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:49,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 11:25:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 586 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-18 11:25:50,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243659269] [2020-08-18 11:25:50,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:50,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:25:50,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794731770] [2020-08-18 11:25:50,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:25:50,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:50,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:25:50,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:25:50,033 INFO L87 Difference]: Start difference. First operand 3178 states and 3483 transitions. Second operand 10 states. [2020-08-18 11:25:51,763 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-08-18 11:25:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:53,515 INFO L93 Difference]: Finished difference Result 6540 states and 7198 transitions. [2020-08-18 11:25:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 11:25:53,516 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 702 [2020-08-18 11:25:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:53,530 INFO L225 Difference]: With dead ends: 6540 [2020-08-18 11:25:53,531 INFO L226 Difference]: Without dead ends: 3552 [2020-08-18 11:25:53,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 11:25:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-18 11:25:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-18 11:25:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-18 11:25:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3868 transitions. [2020-08-18 11:25:53,617 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3868 transitions. Word has length 702 [2020-08-18 11:25:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:53,618 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3868 transitions. [2020-08-18 11:25:53,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:25:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3868 transitions. [2020-08-18 11:25:53,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2020-08-18 11:25:53,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:53,629 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:53,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:25:53,630 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:53,630 INFO L82 PathProgramCache]: Analyzing trace with hash 326490438, now seen corresponding path program 1 times [2020-08-18 11:25:53,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:53,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415893906] [2020-08-18 11:25:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:53,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:53,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:53,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:53,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:53,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:25:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:54,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 11:25:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 733 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-18 11:25:54,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415893906] [2020-08-18 11:25:54,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:54,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 11:25:54,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076629140] [2020-08-18 11:25:54,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:25:54,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:54,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:25:54,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:25:54,710 INFO L87 Difference]: Start difference. First operand 3548 states and 3868 transitions. Second operand 7 states. [2020-08-18 11:25:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:56,169 INFO L93 Difference]: Finished difference Result 8032 states and 8888 transitions. [2020-08-18 11:25:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:25:56,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 728 [2020-08-18 11:25:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:56,193 INFO L225 Difference]: With dead ends: 8032 [2020-08-18 11:25:56,194 INFO L226 Difference]: Without dead ends: 4674 [2020-08-18 11:25:56,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:25:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-18 11:25:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-18 11:25:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 11:25:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4748 transitions. [2020-08-18 11:25:56,282 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4748 transitions. Word has length 728 [2020-08-18 11:25:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:56,283 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4748 transitions. [2020-08-18 11:25:56,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:25:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4748 transitions. [2020-08-18 11:25:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2020-08-18 11:25:56,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:56,293 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:56,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:25:56,294 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1244120290, now seen corresponding path program 1 times [2020-08-18 11:25:56,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:56,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832937171] [2020-08-18 11:25:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:56,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:56,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:56,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:56,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:25:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:56,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 11:25:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:56,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 11:25:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 291 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-18 11:25:57,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832937171] [2020-08-18 11:25:57,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:57,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 11:25:57,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74423627] [2020-08-18 11:25:57,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:25:57,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:57,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:25:57,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:25:57,389 INFO L87 Difference]: Start difference. First operand 4292 states and 4748 transitions. Second operand 5 states. [2020-08-18 11:25:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:58,528 INFO L93 Difference]: Finished difference Result 4296 states and 4751 transitions. [2020-08-18 11:25:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:25:58,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 783 [2020-08-18 11:25:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:58,544 INFO L225 Difference]: With dead ends: 4296 [2020-08-18 11:25:58,544 INFO L226 Difference]: Without dead ends: 4294 [2020-08-18 11:25:58,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:25:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-18 11:25:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-18 11:25:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 11:25:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-18 11:25:58,621 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 783 [2020-08-18 11:25:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:58,622 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-18 11:25:58,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:25:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-18 11:25:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-08-18 11:25:58,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:58,635 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 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, 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, 1, 1] [2020-08-18 11:25:58,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 11:25:58,636 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash 277730204, now seen corresponding path program 1 times [2020-08-18 11:25:58,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:58,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466840670] [2020-08-18 11:25:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:58,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:58,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:58,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:58,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:58,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:25:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:59,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 11:25:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:59,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 11:25:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:59,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 11:25:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 340 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-18 11:25:59,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466840670] [2020-08-18 11:25:59,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:59,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 11:25:59,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038280748] [2020-08-18 11:25:59,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:25:59,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:59,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:25:59,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:25:59,519 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-18 11:26:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:26:00,663 INFO L93 Difference]: Finished difference Result 4668 states and 5158 transitions. [2020-08-18 11:26:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:26:00,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 828 [2020-08-18 11:26:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:26:00,693 INFO L225 Difference]: With dead ends: 4668 [2020-08-18 11:26:00,693 INFO L226 Difference]: Without dead ends: 4666 [2020-08-18 11:26:00,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:26:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-08-18 11:26:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4292. [2020-08-18 11:26:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 11:26:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4751 transitions. [2020-08-18 11:26:00,775 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4751 transitions. Word has length 828 [2020-08-18 11:26:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:26:00,776 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4751 transitions. [2020-08-18 11:26:00,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:26:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4751 transitions. [2020-08-18 11:26:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-08-18 11:26:00,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:26:00,795 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 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, 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, 1, 1] [2020-08-18 11:26:00,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 11:26:00,795 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:26:00,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:26:00,796 INFO L82 PathProgramCache]: Analyzing trace with hash 117494447, now seen corresponding path program 1 times [2020-08-18 11:26:00,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:26:00,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234475686] [2020-08-18 11:26:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:26:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:26:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:26:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:26:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:26:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:26:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 11:26:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 11:26:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 11:26:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 337 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-18 11:26:01,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234475686] [2020-08-18 11:26:01,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:26:01,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 11:26:01,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775529969] [2020-08-18 11:26:01,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:26:01,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:26:01,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:26:01,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:26:01,689 INFO L87 Difference]: Start difference. First operand 4292 states and 4751 transitions. Second operand 7 states. [2020-08-18 11:26:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:26:04,241 INFO L93 Difference]: Finished difference Result 4854 states and 5352 transitions. [2020-08-18 11:26:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:26:04,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 839 [2020-08-18 11:26:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:26:04,244 INFO L225 Difference]: With dead ends: 4854 [2020-08-18 11:26:04,244 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 11:26:04,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:26:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 11:26:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 11:26:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 11:26:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 11:26:04,252 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 839 [2020-08-18 11:26:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:26:04,252 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 11:26:04,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:26:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 11:26:04,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 11:26:04,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 11:26:04,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 11:26:04,794 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 163 [2020-08-18 11:26:05,079 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 163 [2020-08-18 11:26:06,090 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 41 [2020-08-18 11:26:06,680 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 38