/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o100.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:18:39,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:18:39,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:18:39,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:18:39,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:18:40,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:18:40,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:18:40,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:18:40,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:18:40,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:18:40,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:18:40,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:18:40,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:18:40,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:18:40,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:18:40,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:18:40,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:18:40,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:18:40,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:18:40,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:18:40,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:18:40,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:18:40,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:18:40,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:18:40,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:18:40,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:18:40,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:18:40,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:18:40,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:18:40,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:18:40,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:18:40,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:18:40,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:18:40,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:18:40,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:18:40,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:18:40,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:18:40,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:18:40,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:18:40,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:18:40,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:18:40,067 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 [2020-08-21 13:18:40,109 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:18:40,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:18:40,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:18:40,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:18:40,113 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:18:40,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:18:40,114 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:18:40,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:18:40,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:18:40,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:18:40,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:18:40,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:18:40,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:18:40,116 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:18:40,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:18:40,117 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:18:40,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:18:40,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:18:40,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:18:40,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:18:40,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:18:40,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:18:40,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:18:40,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:18:40,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:18:40,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:18:40,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:18:40,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:18:40,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:18:40,120 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 -> false [2020-08-21 13:18:40,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:18:40,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:18:40,453 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:18:40,455 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:18:40,455 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:18:40,456 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o100.c [2020-08-21 13:18:40,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d1aa9852/b0f4ef58632b41a9afe8a5d029edd55a/FLAGf65b496fa [2020-08-21 13:18:40,998 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:18:40,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o100.c [2020-08-21 13:18:41,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d1aa9852/b0f4ef58632b41a9afe8a5d029edd55a/FLAGf65b496fa [2020-08-21 13:18:41,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d1aa9852/b0f4ef58632b41a9afe8a5d029edd55a [2020-08-21 13:18:41,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:18:41,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:18:41,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:41,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:18:41,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:18:41,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21715d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41, skipping insertion in model container [2020-08-21 13:18:41,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:18:41,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:18:41,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:41,608 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:18:41,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:41,642 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:18:41,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41 WrapperNode [2020-08-21 13:18:41,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:41,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:18:41,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:18:41,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:18:41,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (1/1) ... [2020-08-21 13:18:41,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:18:41,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:18:41,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:18:41,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:18:41,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (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 [2020-08-21 13:18:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:18:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:18:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 13:18:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:18:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 13:18:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:18:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 13:18:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:18:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:18:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:18:41,974 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:18:41,975 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:18:41,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:41 BoogieIcfgContainer [2020-08-21 13:18:41,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:18:41,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:18:41,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:18:41,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:18:41,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:18:41" (1/3) ... [2020-08-21 13:18:41,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bfcd58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:41, skipping insertion in model container [2020-08-21 13:18:41,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:41" (2/3) ... [2020-08-21 13:18:41,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bfcd58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:41, skipping insertion in model container [2020-08-21 13:18:41,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:41" (3/3) ... [2020-08-21 13:18:41,987 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o100.c [2020-08-21 13:18:41,997 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:18:42,003 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:18:42,017 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:18:42,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:18:42,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:18:42,043 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:18:42,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:18:42,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:18:42,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:18:42,044 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:18:42,044 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:18:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 13:18:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:18:42,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:42,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:42,070 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:42,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 13:18:42,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:42,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431553383] [2020-08-21 13:18:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:18:42,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431553383] [2020-08-21 13:18:42,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:18:42,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:18:42,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882309428] [2020-08-21 13:18:42,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:18:42,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:42,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:18:42,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:42,387 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 13:18:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:42,436 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-21 13:18:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:18:42,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 13:18:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:42,450 INFO L225 Difference]: With dead ends: 32 [2020-08-21 13:18:42,451 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 13:18:42,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 13:18:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 13:18:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 13:18:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 13:18:42,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 13:18:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:42,516 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 13:18:42,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:18:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 13:18:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:18:42,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:42,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:42,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:18:42,519 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 13:18:42,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:42,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440655006] [2020-08-21 13:18:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:18:42,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440655006] [2020-08-21 13:18:42,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:42,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:18:42,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60440722] [2020-08-21 13:18:42,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:18:42,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:42,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:18:42,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:18:42,735 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-21 13:18:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:42,765 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 13:18:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:18:42,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-21 13:18:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:42,767 INFO L225 Difference]: With dead ends: 25 [2020-08-21 13:18:42,768 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 13:18:42,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:18:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 13:18:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 13:18:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 13:18:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 13:18:42,776 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 13:18:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:42,777 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 13:18:42,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:18:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 13:18:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:18:42,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:42,778 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:42,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:18:42,779 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:42,780 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 13:18:42,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:42,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758293750] [2020-08-21 13:18:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:42,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 13:18:43,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758293750] [2020-08-21 13:18:43,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:43,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:18:43,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490606732] [2020-08-21 13:18:43,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:18:43,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:43,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:18:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:18:43,017 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-21 13:18:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:43,072 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 13:18:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:18:43,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-21 13:18:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:43,074 INFO L225 Difference]: With dead ends: 28 [2020-08-21 13:18:43,075 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 13:18:43,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:18:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 13:18:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 13:18:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 13:18:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 13:18:43,083 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 13:18:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:43,083 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 13:18:43,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:18:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 13:18:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:18:43,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:43,085 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:43,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:18:43,086 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:43,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 13:18:43,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:43,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025485113] [2020-08-21 13:18:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 13:18:43,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025485113] [2020-08-21 13:18:43,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:43,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:18:43,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784418919] [2020-08-21 13:18:43,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:18:43,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:43,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:18:43,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:43,355 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-21 13:18:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:43,413 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 13:18:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:18:43,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-21 13:18:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:43,416 INFO L225 Difference]: With dead ends: 31 [2020-08-21 13:18:43,416 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 13:18:43,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 13:18:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 13:18:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 13:18:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 13:18:43,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 13:18:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:43,424 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 13:18:43,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:18:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 13:18:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 13:18:43,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:43,426 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:43,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:18:43,427 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:43,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 13:18:43,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:43,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608509490] [2020-08-21 13:18:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 13:18:43,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608509490] [2020-08-21 13:18:43,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:43,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 13:18:43,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163100249] [2020-08-21 13:18:43,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:18:43,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:18:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:18:43,780 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-21 13:18:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:43,869 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 13:18:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 13:18:43,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-21 13:18:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:43,872 INFO L225 Difference]: With dead ends: 34 [2020-08-21 13:18:43,872 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 13:18:43,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:18:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 13:18:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 13:18:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 13:18:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 13:18:43,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 13:18:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:43,884 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 13:18:43,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:18:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 13:18:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 13:18:43,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:43,886 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:43,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:18:43,886 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:43,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:43,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 13:18:43,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:43,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894790490] [2020-08-21 13:18:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:43,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 13:18:44,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894790490] [2020-08-21 13:18:44,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:44,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 13:18:44,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174760373] [2020-08-21 13:18:44,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:18:44,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:18:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:18:44,234 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-21 13:18:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:44,343 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 13:18:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:18:44,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-21 13:18:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:44,345 INFO L225 Difference]: With dead ends: 37 [2020-08-21 13:18:44,345 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 13:18:44,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:18:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 13:18:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 13:18:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 13:18:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 13:18:44,353 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 13:18:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:44,353 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 13:18:44,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:18:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 13:18:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 13:18:44,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:44,356 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:44,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:18:44,356 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 13:18:44,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:44,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152222107] [2020-08-21 13:18:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 13:18:44,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152222107] [2020-08-21 13:18:44,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:44,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 13:18:44,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736142980] [2020-08-21 13:18:44,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 13:18:44,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 13:18:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:18:44,727 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-21 13:18:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:44,839 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 13:18:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 13:18:44,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-21 13:18:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:44,841 INFO L225 Difference]: With dead ends: 40 [2020-08-21 13:18:44,841 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 13:18:44,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:18:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 13:18:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 13:18:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 13:18:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 13:18:44,849 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 13:18:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:44,849 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 13:18:44,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 13:18:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 13:18:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 13:18:44,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:44,851 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:44,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:18:44,851 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:44,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 13:18:44,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:44,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825158940] [2020-08-21 13:18:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:44,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 13:18:45,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825158940] [2020-08-21 13:18:45,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:45,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 13:18:45,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911655073] [2020-08-21 13:18:45,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 13:18:45,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:45,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 13:18:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:18:45,273 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-21 13:18:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:45,409 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 13:18:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:18:45,410 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-21 13:18:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:45,411 INFO L225 Difference]: With dead ends: 43 [2020-08-21 13:18:45,411 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 13:18:45,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:18:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 13:18:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 13:18:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 13:18:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 13:18:45,419 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 13:18:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:45,419 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 13:18:45,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 13:18:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 13:18:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 13:18:45,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:45,421 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:45,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:18:45,421 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:45,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 13:18:45,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:45,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009844900] [2020-08-21 13:18:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 13:18:45,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009844900] [2020-08-21 13:18:45,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:45,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 13:18:45,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820769868] [2020-08-21 13:18:45,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 13:18:45,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:45,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 13:18:45,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:18:45,939 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-21 13:18:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:46,107 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 13:18:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 13:18:46,107 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-21 13:18:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:46,109 INFO L225 Difference]: With dead ends: 46 [2020-08-21 13:18:46,109 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 13:18:46,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:18:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 13:18:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 13:18:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 13:18:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 13:18:46,121 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 13:18:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:46,122 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 13:18:46,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 13:18:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 13:18:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 13:18:46,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:46,126 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:46,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:18:46,126 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:46,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 13:18:46,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:46,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506467729] [2020-08-21 13:18:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 13:18:46,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506467729] [2020-08-21 13:18:46,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:46,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 13:18:46,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059673467] [2020-08-21 13:18:46,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 13:18:46,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:46,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 13:18:46,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:18:46,826 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-21 13:18:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:47,032 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 13:18:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 13:18:47,032 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-21 13:18:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:47,033 INFO L225 Difference]: With dead ends: 49 [2020-08-21 13:18:47,033 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 13:18:47,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:18:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 13:18:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 13:18:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 13:18:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 13:18:47,044 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 13:18:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:47,045 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 13:18:47,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 13:18:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 13:18:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 13:18:47,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:47,051 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:47,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:18:47,051 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:47,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 13:18:47,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:47,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184883358] [2020-08-21 13:18:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 13:18:47,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184883358] [2020-08-21 13:18:47,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:47,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 13:18:47,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146052493] [2020-08-21 13:18:47,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 13:18:47,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:47,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 13:18:47,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:18:47,763 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-21 13:18:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:48,038 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 13:18:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 13:18:48,039 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-21 13:18:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:48,040 INFO L225 Difference]: With dead ends: 52 [2020-08-21 13:18:48,040 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 13:18:48,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:18:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 13:18:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 13:18:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 13:18:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 13:18:48,053 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 13:18:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:48,054 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 13:18:48,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 13:18:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 13:18:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 13:18:48,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:48,057 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:48,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:18:48,058 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 13:18:48,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:48,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162529726] [2020-08-21 13:18:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 13:18:48,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162529726] [2020-08-21 13:18:48,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:48,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 13:18:48,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795248872] [2020-08-21 13:18:48,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 13:18:48,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:48,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 13:18:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-21 13:18:48,965 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-21 13:18:49,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:49,285 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 13:18:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 13:18:49,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-21 13:18:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:49,287 INFO L225 Difference]: With dead ends: 55 [2020-08-21 13:18:49,287 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 13:18:49,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-21 13:18:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 13:18:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 13:18:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 13:18:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 13:18:49,294 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 13:18:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:49,295 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 13:18:49,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 13:18:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 13:18:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 13:18:49,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:49,296 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:49,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:18:49,296 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-21 13:18:49,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:49,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435150573] [2020-08-21 13:18:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:49,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 13:18:50,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435150573] [2020-08-21 13:18:50,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:50,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 13:18:50,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055641045] [2020-08-21 13:18:50,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 13:18:50,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 13:18:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-21 13:18:50,197 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-21 13:18:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:50,543 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 13:18:50,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 13:18:50,543 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-21 13:18:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:50,544 INFO L225 Difference]: With dead ends: 58 [2020-08-21 13:18:50,545 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 13:18:50,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-21 13:18:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 13:18:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 13:18:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 13:18:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 13:18:50,560 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 13:18:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:50,560 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 13:18:50,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 13:18:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 13:18:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 13:18:50,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:50,562 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:50,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:18:50,562 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-21 13:18:50,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:50,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180007479] [2020-08-21 13:18:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:50,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 13:18:51,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180007479] [2020-08-21 13:18:51,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:51,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 13:18:51,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671943206] [2020-08-21 13:18:51,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 13:18:51,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 13:18:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-21 13:18:51,617 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-21 13:18:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:51,992 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 13:18:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 13:18:51,993 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-21 13:18:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:51,994 INFO L225 Difference]: With dead ends: 61 [2020-08-21 13:18:51,994 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 13:18:51,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-21 13:18:51,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 13:18:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 13:18:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 13:18:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 13:18:52,001 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 13:18:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:52,001 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 13:18:52,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 13:18:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 13:18:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 13:18:52,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:52,003 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:52,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:18:52,003 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:52,004 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-21 13:18:52,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:52,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255125729] [2020-08-21 13:18:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:52,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 13:18:53,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255125729] [2020-08-21 13:18:53,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:53,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-21 13:18:53,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648972035] [2020-08-21 13:18:53,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-21 13:18:53,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:53,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-21 13:18:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 13:18:53,077 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-21 13:18:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:53,545 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 13:18:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 13:18:53,546 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-21 13:18:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:53,547 INFO L225 Difference]: With dead ends: 64 [2020-08-21 13:18:53,547 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 13:18:53,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 13:18:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 13:18:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 13:18:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 13:18:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 13:18:53,563 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 13:18:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:53,565 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 13:18:53,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-21 13:18:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 13:18:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 13:18:53,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:53,567 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:53,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:18:53,567 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-21 13:18:53,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:53,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121773870] [2020-08-21 13:18:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:53,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 13:18:54,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121773870] [2020-08-21 13:18:54,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:54,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-21 13:18:54,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625796639] [2020-08-21 13:18:54,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-21 13:18:54,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:54,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-21 13:18:54,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 13:18:54,840 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-21 13:18:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:55,374 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 13:18:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-21 13:18:55,375 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-21 13:18:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:55,377 INFO L225 Difference]: With dead ends: 67 [2020-08-21 13:18:55,377 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 13:18:55,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 13:18:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 13:18:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 13:18:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 13:18:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 13:18:55,384 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 13:18:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:55,384 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 13:18:55,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-21 13:18:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 13:18:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 13:18:55,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:55,386 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:55,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:18:55,386 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-21 13:18:55,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:55,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680178098] [2020-08-21 13:18:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:55,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:56,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 13:18:57,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680178098] [2020-08-21 13:18:57,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:57,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-21 13:18:57,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963905593] [2020-08-21 13:18:57,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-21 13:18:57,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:57,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-21 13:18:57,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 13:18:57,018 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-21 13:18:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:57,595 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 13:18:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 13:18:57,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-21 13:18:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:57,597 INFO L225 Difference]: With dead ends: 70 [2020-08-21 13:18:57,597 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 13:18:57,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 13:18:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 13:18:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 13:18:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 13:18:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 13:18:57,603 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 13:18:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:57,604 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 13:18:57,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-21 13:18:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 13:18:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 13:18:57,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:57,606 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:57,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:18:57,606 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-21 13:18:57,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:57,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265549778] [2020-08-21 13:18:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:57,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:58,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 13:18:59,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265549778] [2020-08-21 13:18:59,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:59,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-21 13:18:59,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455619111] [2020-08-21 13:18:59,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-21 13:18:59,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-21 13:18:59,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 13:18:59,203 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-21 13:18:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:59,848 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 13:18:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-21 13:18:59,849 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-21 13:18:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:59,850 INFO L225 Difference]: With dead ends: 73 [2020-08-21 13:18:59,850 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 13:18:59,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 13:18:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 13:18:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 13:18:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 13:18:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 13:18:59,866 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 13:18:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:59,866 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 13:18:59,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-21 13:18:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 13:18:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 13:18:59,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:59,870 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:59,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 13:18:59,871 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-21 13:18:59,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:59,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928546079] [2020-08-21 13:18:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:59,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 13:19:01,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928546079] [2020-08-21 13:19:01,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:01,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-21 13:19:01,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261766185] [2020-08-21 13:19:01,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-21 13:19:01,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-21 13:19:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 13:19:01,475 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-21 13:19:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:02,181 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 13:19:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-21 13:19:02,181 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-21 13:19:02,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:02,183 INFO L225 Difference]: With dead ends: 76 [2020-08-21 13:19:02,183 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 13:19:02,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 13:19:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 13:19:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 13:19:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 13:19:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 13:19:02,189 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 13:19:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:02,190 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 13:19:02,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-21 13:19:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 13:19:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 13:19:02,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:02,191 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:02,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 13:19:02,192 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:02,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-21 13:19:02,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:02,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385554269] [2020-08-21 13:19:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:02,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:03,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 13:19:04,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385554269] [2020-08-21 13:19:04,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:04,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-21 13:19:04,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439713331] [2020-08-21 13:19:04,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-21 13:19:04,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:04,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-21 13:19:04,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 13:19:04,006 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-21 13:19:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:04,776 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 13:19:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-21 13:19:04,776 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-21 13:19:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:04,778 INFO L225 Difference]: With dead ends: 79 [2020-08-21 13:19:04,778 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 13:19:04,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 13:19:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 13:19:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 13:19:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 13:19:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 13:19:04,784 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 13:19:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:04,785 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 13:19:04,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-21 13:19:04,785 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 13:19:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 13:19:04,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:04,786 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:04,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 13:19:04,786 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-21 13:19:04,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:04,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143687646] [2020-08-21 13:19:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:04,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:05,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:06,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:06,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:06,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:06,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:06,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-21 13:19:06,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143687646] [2020-08-21 13:19:06,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:06,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-21 13:19:06,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860829710] [2020-08-21 13:19:06,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-21 13:19:06,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:06,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-21 13:19:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 13:19:06,729 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-21 13:19:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:07,618 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-21 13:19:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-21 13:19:07,618 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-21 13:19:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:07,620 INFO L225 Difference]: With dead ends: 82 [2020-08-21 13:19:07,620 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 13:19:07,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 13:19:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 13:19:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 13:19:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 13:19:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-21 13:19:07,625 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-21 13:19:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:07,626 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-21 13:19:07,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-21 13:19:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-21 13:19:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 13:19:07,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:07,627 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:07,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 13:19:07,628 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-21 13:19:07,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:07,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144204795] [2020-08-21 13:19:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:07,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:07,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:07,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:07,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:07,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:07,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:08,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:09,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:09,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:09,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:09,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:09,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:09,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 13:19:09,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144204795] [2020-08-21 13:19:09,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:09,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-21 13:19:09,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126432877] [2020-08-21 13:19:09,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-21 13:19:09,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:09,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-21 13:19:09,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 13:19:09,817 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 47 states. [2020-08-21 13:19:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:10,789 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-21 13:19:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-21 13:19:10,792 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-08-21 13:19:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:10,794 INFO L225 Difference]: With dead ends: 85 [2020-08-21 13:19:10,794 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 13:19:10,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 13:19:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 13:19:10,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 13:19:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 13:19:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-21 13:19:10,799 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-21 13:19:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:10,800 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-21 13:19:10,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-21 13:19:10,800 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-21 13:19:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 13:19:10,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:10,802 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:10,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 13:19:10,802 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:10,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-21 13:19:10,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:10,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179959563] [2020-08-21 13:19:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:10,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:10,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:10,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:11,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:12,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:12,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:12,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:12,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:12,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:12,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:12,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:12,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-21 13:19:13,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179959563] [2020-08-21 13:19:13,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:13,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-21 13:19:13,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252545185] [2020-08-21 13:19:13,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-21 13:19:13,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-21 13:19:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-21 13:19:13,090 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 49 states. [2020-08-21 13:19:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:14,154 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-21 13:19:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-21 13:19:14,155 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-08-21 13:19:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:14,156 INFO L225 Difference]: With dead ends: 88 [2020-08-21 13:19:14,157 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 13:19:14,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-21 13:19:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 13:19:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 13:19:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 13:19:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-21 13:19:14,163 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-21 13:19:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:14,163 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-21 13:19:14,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-21 13:19:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-21 13:19:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 13:19:14,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:14,165 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:14,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 13:19:14,166 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-21 13:19:14,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:14,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475649197] [2020-08-21 13:19:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:14,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:16,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:16,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:16,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-21 13:19:16,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475649197] [2020-08-21 13:19:16,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:16,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-21 13:19:16,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808654011] [2020-08-21 13:19:16,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-21 13:19:16,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:16,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-21 13:19:16,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-21 13:19:16,574 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 51 states. [2020-08-21 13:19:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:17,742 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-21 13:19:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-21 13:19:17,743 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-08-21 13:19:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:17,745 INFO L225 Difference]: With dead ends: 91 [2020-08-21 13:19:17,745 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 13:19:17,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-21 13:19:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 13:19:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 13:19:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 13:19:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-21 13:19:17,751 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-21 13:19:17,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:17,752 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-21 13:19:17,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-21 13:19:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-21 13:19:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 13:19:17,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:17,754 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:17,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 13:19:17,754 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-21 13:19:17,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:17,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202104828] [2020-08-21 13:19:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:17,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:17,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:17,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:17,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:18,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:19,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:19,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:19,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:19,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:19,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:19,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:19,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:19,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:20,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:20,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-21 13:19:20,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202104828] [2020-08-21 13:19:20,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:20,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-21 13:19:20,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287135163] [2020-08-21 13:19:20,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-21 13:19:20,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-21 13:19:20,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-21 13:19:20,399 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 53 states. [2020-08-21 13:19:21,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:21,672 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-21 13:19:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-21 13:19:21,672 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2020-08-21 13:19:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:21,675 INFO L225 Difference]: With dead ends: 94 [2020-08-21 13:19:21,675 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 13:19:21,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-21 13:19:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 13:19:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 13:19:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 13:19:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-21 13:19:21,681 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-21 13:19:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:21,682 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-21 13:19:21,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-21 13:19:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-21 13:19:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-21 13:19:21,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:21,684 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:21,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 13:19:21,684 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:21,685 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-21 13:19:21,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:21,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220437207] [2020-08-21 13:19:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:21,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:21,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:21,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:21,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:22,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:23,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:23,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:23,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:23,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:23,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:23,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:23,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:23,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:24,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:24,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:24,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-21 13:19:24,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220437207] [2020-08-21 13:19:24,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:24,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-21 13:19:24,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162573624] [2020-08-21 13:19:24,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-21 13:19:24,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-21 13:19:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 13:19:24,595 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-21 13:19:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:25,930 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-21 13:19:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-21 13:19:25,931 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-21 13:19:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:25,933 INFO L225 Difference]: With dead ends: 97 [2020-08-21 13:19:25,933 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 13:19:25,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 13:19:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 13:19:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-21 13:19:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 13:19:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-21 13:19:25,939 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-21 13:19:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:25,939 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-21 13:19:25,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-21 13:19:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-21 13:19:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-21 13:19:25,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:25,941 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:25,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 13:19:25,941 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-21 13:19:25,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:25,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532288713] [2020-08-21 13:19:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:26,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:27,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:28,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-21 13:19:29,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532288713] [2020-08-21 13:19:29,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:29,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-21 13:19:29,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534477666] [2020-08-21 13:19:29,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-21 13:19:29,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:29,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-21 13:19:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-21 13:19:29,027 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 57 states. [2020-08-21 13:19:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:30,523 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-21 13:19:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-21 13:19:30,524 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2020-08-21 13:19:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:30,525 INFO L225 Difference]: With dead ends: 100 [2020-08-21 13:19:30,526 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 13:19:30,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-21 13:19:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 13:19:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-21 13:19:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 13:19:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-21 13:19:30,533 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 169 [2020-08-21 13:19:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:30,534 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-21 13:19:30,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-21 13:19:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-21 13:19:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-21 13:19:30,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:30,535 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:30,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 13:19:30,536 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1625096943, now seen corresponding path program 27 times [2020-08-21 13:19:30,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:30,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820385160] [2020-08-21 13:19:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:30,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:30,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:30,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:30,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:30,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:31,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-08-21 13:19:33,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820385160] [2020-08-21 13:19:33,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:33,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-21 13:19:33,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547095306] [2020-08-21 13:19:33,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-21 13:19:33,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-21 13:19:33,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-21 13:19:33,928 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 59 states. [2020-08-21 13:19:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:35,571 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2020-08-21 13:19:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-21 13:19:35,572 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2020-08-21 13:19:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:35,573 INFO L225 Difference]: With dead ends: 103 [2020-08-21 13:19:35,573 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 13:19:35,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-21 13:19:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 13:19:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-08-21 13:19:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 13:19:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-08-21 13:19:35,580 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 175 [2020-08-21 13:19:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:35,580 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-08-21 13:19:35,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-21 13:19:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-08-21 13:19:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-21 13:19:35,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:35,582 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:35,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 13:19:35,582 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:35,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1463833859, now seen corresponding path program 28 times [2020-08-21 13:19:35,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:35,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646315175] [2020-08-21 13:19:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat