/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:40:52,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:40:52,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:40:52,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:40:52,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:40:52,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:40:53,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:40:53,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:40:53,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:40:53,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:40:53,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:40:53,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:40:53,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:40:53,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:40:53,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:40:53,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:40:53,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:40:53,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:40:53,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:40:53,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:40:53,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:40:53,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:40:53,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:40:53,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:40:53,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:40:53,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:40:53,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:40:53,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:40:53,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:40:53,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:40:53,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:40:53,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:40:53,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:40:53,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:40:53,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:40:53,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:40:53,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:40:53,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:40:53,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:40:53,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:40:53,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:40:53,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:40:53,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:40:53,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:40:53,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:40:53,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:40:53,094 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:40:53,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:40:53,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:40:53,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:40:53,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:40:53,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:40:53,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:40:53,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:40:53,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:40:53,097 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:40:53,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:40:53,097 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:40:53,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:40:53,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:40:53,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:40:53,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:40:53,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:40:53,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:40:53,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:40:53,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:40:53,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:40:53,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:40:53,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:40:53,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:40:53,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:40:53,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:40:53,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:40:53,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:40:53,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:40:53,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:40:53,453 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:40:53,454 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-18 22:40:53,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02893dced/d205e2476e1d43b6b76e7ef75ee29123/FLAG83d65a931 [2020-08-18 22:40:54,001 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:40:54,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-18 22:40:54,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02893dced/d205e2476e1d43b6b76e7ef75ee29123/FLAG83d65a931 [2020-08-18 22:40:54,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02893dced/d205e2476e1d43b6b76e7ef75ee29123 [2020-08-18 22:40:54,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:40:54,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:40:54,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:40:54,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:40:54,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:40:54,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45241865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54, skipping insertion in model container [2020-08-18 22:40:54,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:40:54,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:40:54,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:40:54,654 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:40:54,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:40:54,832 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:40:54,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54 WrapperNode [2020-08-18 22:40:54,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:40:54,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:40:54,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:40:54,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:40:54,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (1/1) ... [2020-08-18 22:40:54,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:40:54,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:40:54,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:40:54,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:40:54,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:40:54,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:40:54,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:40:54,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:40:54,951 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-18 22:40:54,951 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-18 22:40:54,951 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-18 22:40:54,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:40:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:40:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 22:40:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 22:40:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:40:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-18 22:40:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-18 22:40:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-18 22:40:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:40:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:40:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:40:55,372 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:40:55,372 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 22:40:55,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:40:55 BoogieIcfgContainer [2020-08-18 22:40:55,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:40:55,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:40:55,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:40:55,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:40:55,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:40:54" (1/3) ... [2020-08-18 22:40:55,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57720afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:40:55, skipping insertion in model container [2020-08-18 22:40:55,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:40:54" (2/3) ... [2020-08-18 22:40:55,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57720afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:40:55, skipping insertion in model container [2020-08-18 22:40:55,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:40:55" (3/3) ... [2020-08-18 22:40:55,384 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-18 22:40:55,402 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:40:55,408 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:40:55,420 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:40:55,443 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:40:55,444 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:40:55,444 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:40:55,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:40:55,444 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:40:55,444 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:40:55,444 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:40:55,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:40:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-18 22:40:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 22:40:55,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:55,472 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:55,472 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:55,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-18 22:40:55,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:55,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549425960] [2020-08-18 22:40:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:55,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:55,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:55,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 22:40:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:55,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 22:40:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:55,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 22:40:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:55,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549425960] [2020-08-18 22:40:55,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:55,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 22:40:55,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798014118] [2020-08-18 22:40:55,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:40:55,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:40:55,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:40:55,862 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-18 22:40:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:56,010 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-18 22:40:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:40:56,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-18 22:40:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:56,026 INFO L225 Difference]: With dead ends: 136 [2020-08-18 22:40:56,026 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 22:40:56,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:40:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 22:40:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-18 22:40:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 22:40:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-18 22:40:56,091 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-18 22:40:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:56,092 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-18 22:40:56,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:40:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-18 22:40:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 22:40:56,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:56,096 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:56,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:40:56,097 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-18 22:40:56,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:56,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136603313] [2020-08-18 22:40:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 22:40:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 22:40:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:40:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:56,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136603313] [2020-08-18 22:40:56,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:56,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 22:40:56,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34699814] [2020-08-18 22:40:56,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:40:56,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:40:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:40:56,242 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-18 22:40:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:56,331 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-18 22:40:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:40:56,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-18 22:40:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:56,335 INFO L225 Difference]: With dead ends: 129 [2020-08-18 22:40:56,335 INFO L226 Difference]: Without dead ends: 79 [2020-08-18 22:40:56,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:40:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-18 22:40:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-18 22:40:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 22:40:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-18 22:40:56,371 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-18 22:40:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:56,372 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-18 22:40:56,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:40:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-18 22:40:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 22:40:56,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:56,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:56,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:40:56,375 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-18 22:40:56,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:56,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57982920] [2020-08-18 22:40:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 22:40:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 22:40:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 22:40:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:56,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57982920] [2020-08-18 22:40:56,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:56,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:40:56,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719857258] [2020-08-18 22:40:56,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:40:56,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:40:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:40:56,571 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-18 22:40:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:56,685 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-18 22:40:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:40:56,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-18 22:40:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:56,688 INFO L225 Difference]: With dead ends: 145 [2020-08-18 22:40:56,688 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 22:40:56,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:40:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 22:40:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-18 22:40:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 22:40:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-18 22:40:56,705 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-18 22:40:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:56,705 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-18 22:40:56,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:40:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-18 22:40:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 22:40:56,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:56,710 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:56,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:40:56,711 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-18 22:40:56,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:56,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919520431] [2020-08-18 22:40:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 22:40:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 22:40:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 22:40:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:56,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919520431] [2020-08-18 22:40:56,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:56,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:40:56,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414040715] [2020-08-18 22:40:56,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:40:56,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:56,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:40:56,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:40:56,824 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-18 22:40:56,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:56,904 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-18 22:40:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:40:56,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-18 22:40:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:56,907 INFO L225 Difference]: With dead ends: 156 [2020-08-18 22:40:56,907 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 22:40:56,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:40:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 22:40:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-18 22:40:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 22:40:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-18 22:40:56,923 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-18 22:40:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:56,923 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-18 22:40:56,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:40:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-18 22:40:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 22:40:56,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:56,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:56,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:40:56,927 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-18 22:40:56,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:56,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665548684] [2020-08-18 22:40:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:56,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:40:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 22:40:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 22:40:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:57,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665548684] [2020-08-18 22:40:57,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:57,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:40:57,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784678095] [2020-08-18 22:40:57,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:40:57,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:40:57,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:40:57,093 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-18 22:40:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:57,222 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-18 22:40:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:40:57,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-18 22:40:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:57,226 INFO L225 Difference]: With dead ends: 166 [2020-08-18 22:40:57,226 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 22:40:57,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:40:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 22:40:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-18 22:40:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 22:40:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-18 22:40:57,258 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-18 22:40:57,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:57,259 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-18 22:40:57,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:40:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-18 22:40:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 22:40:57,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:57,271 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:57,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:40:57,272 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:57,273 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-18 22:40:57,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:57,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471892039] [2020-08-18 22:40:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 22:40:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 22:40:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:40:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:57,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471892039] [2020-08-18 22:40:57,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:57,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:40:57,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011200353] [2020-08-18 22:40:57,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:40:57,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:40:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:40:57,435 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-18 22:40:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:57,551 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-18 22:40:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:40:57,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-18 22:40:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:57,554 INFO L225 Difference]: With dead ends: 176 [2020-08-18 22:40:57,554 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 22:40:57,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:40:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 22:40:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-18 22:40:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 22:40:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-18 22:40:57,580 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-18 22:40:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:57,581 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-18 22:40:57,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:40:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-18 22:40:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 22:40:57,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:57,583 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:57,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:40:57,584 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-18 22:40:57,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:57,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833904668] [2020-08-18 22:40:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 22:40:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:40:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:40:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:57,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833904668] [2020-08-18 22:40:57,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:57,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:40:57,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152945741] [2020-08-18 22:40:57,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:40:57,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:57,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:40:57,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:40:57,782 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-18 22:40:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:57,918 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-18 22:40:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:40:57,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-18 22:40:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:57,920 INFO L225 Difference]: With dead ends: 178 [2020-08-18 22:40:57,921 INFO L226 Difference]: Without dead ends: 115 [2020-08-18 22:40:57,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:40:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-18 22:40:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-18 22:40:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 22:40:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-18 22:40:57,949 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-18 22:40:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:57,951 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-18 22:40:57,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:40:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-18 22:40:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 22:40:57,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:57,954 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:57,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:40:57,955 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-18 22:40:57,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:57,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738608971] [2020-08-18 22:40:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:57,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 22:40:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 22:40:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 22:40:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:58,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738608971] [2020-08-18 22:40:58,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:58,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:40:58,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668021838] [2020-08-18 22:40:58,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:40:58,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:40:58,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:40:58,079 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-18 22:40:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:58,176 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-18 22:40:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:40:58,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-18 22:40:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:58,179 INFO L225 Difference]: With dead ends: 193 [2020-08-18 22:40:58,179 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 22:40:58,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:40:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 22:40:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-18 22:40:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 22:40:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-18 22:40:58,197 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-18 22:40:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:58,199 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-18 22:40:58,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:40:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-18 22:40:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 22:40:58,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:58,200 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:58,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:40:58,201 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-18 22:40:58,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:58,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160400563] [2020-08-18 22:40:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 22:40:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 22:40:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 22:40:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:58,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160400563] [2020-08-18 22:40:58,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:58,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:40:58,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339290293] [2020-08-18 22:40:58,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:40:58,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:40:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:40:58,395 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-18 22:40:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:58,552 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-18 22:40:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:40:58,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-18 22:40:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:58,555 INFO L225 Difference]: With dead ends: 190 [2020-08-18 22:40:58,555 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 22:40:58,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:40:58,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 22:40:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-18 22:40:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 22:40:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-18 22:40:58,566 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-18 22:40:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:58,566 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-18 22:40:58,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:40:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-18 22:40:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 22:40:58,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:58,568 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:58,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:40:58,569 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:58,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-18 22:40:58,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:58,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930134861] [2020-08-18 22:40:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 22:40:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:40:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:40:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:58,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930134861] [2020-08-18 22:40:58,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:58,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:40:58,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348797086] [2020-08-18 22:40:58,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:40:58,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:40:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:40:58,697 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-18 22:40:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:58,814 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-18 22:40:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:40:58,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-18 22:40:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:58,816 INFO L225 Difference]: With dead ends: 210 [2020-08-18 22:40:58,816 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 22:40:58,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:40:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 22:40:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-18 22:40:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 22:40:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-18 22:40:58,827 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-18 22:40:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:58,828 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-18 22:40:58,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:40:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-18 22:40:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 22:40:58,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:58,830 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:58,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:40:58,830 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:58,831 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-18 22:40:58,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:58,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583991857] [2020-08-18 22:40:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 22:40:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:40:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 22:40:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:58,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583991857] [2020-08-18 22:40:58,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:58,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:40:58,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335741855] [2020-08-18 22:40:58,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:40:58,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:58,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:40:58,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:40:58,992 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-18 22:40:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:59,149 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-18 22:40:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:40:59,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-18 22:40:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:59,152 INFO L225 Difference]: With dead ends: 202 [2020-08-18 22:40:59,152 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 22:40:59,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:40:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 22:40:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-18 22:40:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-18 22:40:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-18 22:40:59,172 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-18 22:40:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:59,172 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-18 22:40:59,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:40:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-18 22:40:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 22:40:59,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:59,174 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:59,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:40:59,174 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-18 22:40:59,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:59,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021681088] [2020-08-18 22:40:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:40:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 22:40:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 22:40:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:59,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021681088] [2020-08-18 22:40:59,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:59,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:40:59,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670203352] [2020-08-18 22:40:59,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:40:59,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:40:59,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:40:59,295 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-18 22:40:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:59,405 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-18 22:40:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:40:59,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 22:40:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:59,408 INFO L225 Difference]: With dead ends: 227 [2020-08-18 22:40:59,408 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 22:40:59,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:40:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 22:40:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-18 22:40:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 22:40:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-18 22:40:59,420 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-18 22:40:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:59,420 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-18 22:40:59,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:40:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-18 22:40:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 22:40:59,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:59,422 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:59,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:40:59,422 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-18 22:40:59,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:59,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140287450] [2020-08-18 22:40:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 22:40:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 22:40:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 22:40:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:40:59,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140287450] [2020-08-18 22:40:59,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:40:59,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:40:59,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161921480] [2020-08-18 22:40:59,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:40:59,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:40:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:40:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:40:59,608 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-18 22:40:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:40:59,828 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-18 22:40:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:40:59,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-18 22:40:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:40:59,831 INFO L225 Difference]: With dead ends: 214 [2020-08-18 22:40:59,832 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 22:40:59,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:40:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 22:40:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-18 22:40:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 22:40:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-18 22:40:59,846 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-18 22:40:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:40:59,847 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-18 22:40:59,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:40:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-18 22:40:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 22:40:59,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:40:59,848 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:40:59,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:40:59,849 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:40:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:40:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-18 22:40:59,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:40:59,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701546618] [2020-08-18 22:40:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:40:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:40:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:40:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:40:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 22:40:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 22:40:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:40:59,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 22:40:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:00,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701546618] [2020-08-18 22:41:00,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:00,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:41:00,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712943581] [2020-08-18 22:41:00,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:41:00,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:41:00,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:41:00,019 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-18 22:41:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:00,140 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-18 22:41:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:41:00,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-18 22:41:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:00,145 INFO L225 Difference]: With dead ends: 244 [2020-08-18 22:41:00,145 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 22:41:00,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:41:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 22:41:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-18 22:41:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 22:41:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-18 22:41:00,157 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-18 22:41:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:00,157 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-18 22:41:00,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:41:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-18 22:41:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 22:41:00,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:00,159 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:00,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:41:00,159 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-18 22:41:00,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:00,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148390673] [2020-08-18 22:41:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 22:41:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:41:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:41:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:00,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148390673] [2020-08-18 22:41:00,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:00,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:41:00,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546582131] [2020-08-18 22:41:00,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:41:00,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:41:00,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:41:00,427 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-18 22:41:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:00,679 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-18 22:41:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:41:00,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-18 22:41:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:00,681 INFO L225 Difference]: With dead ends: 226 [2020-08-18 22:41:00,682 INFO L226 Difference]: Without dead ends: 151 [2020-08-18 22:41:00,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:41:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-18 22:41:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-18 22:41:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 22:41:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-18 22:41:00,693 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-18 22:41:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:00,694 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-18 22:41:00,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:41:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-18 22:41:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 22:41:00,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:00,696 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:00,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:41:00,696 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:00,696 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-18 22:41:00,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:00,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922549529] [2020-08-18 22:41:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:41:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 22:41:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 22:41:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:00,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922549529] [2020-08-18 22:41:00,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:00,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:41:00,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386837191] [2020-08-18 22:41:00,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:41:00,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:00,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:41:00,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:41:00,849 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-18 22:41:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:00,985 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-18 22:41:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:41:00,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-18 22:41:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:00,987 INFO L225 Difference]: With dead ends: 261 [2020-08-18 22:41:00,987 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 22:41:00,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:41:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 22:41:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-18 22:41:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-18 22:41:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-18 22:41:01,001 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-18 22:41:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:01,001 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-18 22:41:01,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:41:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-18 22:41:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-18 22:41:01,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:01,003 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:01,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:41:01,004 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:01,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-18 22:41:01,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:01,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228286329] [2020-08-18 22:41:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:41:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 22:41:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 22:41:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:01,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228286329] [2020-08-18 22:41:01,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:01,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:41:01,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597960092] [2020-08-18 22:41:01,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:41:01,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:41:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:41:01,236 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-18 22:41:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:01,532 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-18 22:41:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 22:41:01,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-18 22:41:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:01,536 INFO L225 Difference]: With dead ends: 238 [2020-08-18 22:41:01,536 INFO L226 Difference]: Without dead ends: 160 [2020-08-18 22:41:01,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:41:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-18 22:41:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-18 22:41:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 22:41:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-18 22:41:01,553 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-18 22:41:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:01,553 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-18 22:41:01,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 22:41:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-18 22:41:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 22:41:01,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:01,555 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:01,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:41:01,555 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-18 22:41:01,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:01,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125447321] [2020-08-18 22:41:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 22:41:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:41:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:41:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:01,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125447321] [2020-08-18 22:41:01,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:01,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:41:01,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011921057] [2020-08-18 22:41:01,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:41:01,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:41:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:41:01,789 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-18 22:41:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:01,940 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-18 22:41:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 22:41:01,941 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-18 22:41:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:01,943 INFO L225 Difference]: With dead ends: 278 [2020-08-18 22:41:01,943 INFO L226 Difference]: Without dead ends: 194 [2020-08-18 22:41:01,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:41:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-18 22:41:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-18 22:41:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 22:41:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-18 22:41:01,961 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-18 22:41:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:01,961 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-18 22:41:01,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 22:41:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-18 22:41:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 22:41:01,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:01,964 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:01,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:41:01,964 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-18 22:41:01,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:01,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448719128] [2020-08-18 22:41:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:01,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 22:41:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 22:41:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 22:41:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:02,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448719128] [2020-08-18 22:41:02,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:02,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:41:02,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569437978] [2020-08-18 22:41:02,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:41:02,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:02,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:41:02,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:41:02,236 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-18 22:41:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:02,509 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-18 22:41:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:41:02,510 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-18 22:41:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:02,511 INFO L225 Difference]: With dead ends: 250 [2020-08-18 22:41:02,512 INFO L226 Difference]: Without dead ends: 169 [2020-08-18 22:41:02,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:41:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-18 22:41:02,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-18 22:41:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-18 22:41:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-18 22:41:02,524 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-18 22:41:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:02,524 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-18 22:41:02,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:41:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-18 22:41:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 22:41:02,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:02,526 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:02,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:41:02,526 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:02,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-18 22:41:02,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:02,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141688895] [2020-08-18 22:41:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:41:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 22:41:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 22:41:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:02,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141688895] [2020-08-18 22:41:02,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:02,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:41:02,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336840579] [2020-08-18 22:41:02,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:41:02,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:02,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:41:02,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:41:02,707 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-18 22:41:02,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:02,850 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-18 22:41:02,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:41:02,851 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-18 22:41:02,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:02,853 INFO L225 Difference]: With dead ends: 295 [2020-08-18 22:41:02,853 INFO L226 Difference]: Without dead ends: 208 [2020-08-18 22:41:02,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:41:02,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-18 22:41:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-18 22:41:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 22:41:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-18 22:41:02,866 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-18 22:41:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:02,866 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-18 22:41:02,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:41:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-18 22:41:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 22:41:02,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:02,868 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:02,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:41:02,868 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-18 22:41:02,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:02,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799704643] [2020-08-18 22:41:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:02,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 22:41:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 22:41:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 22:41:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:03,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799704643] [2020-08-18 22:41:03,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:03,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:41:03,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647810375] [2020-08-18 22:41:03,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:41:03,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:03,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:41:03,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:41:03,220 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-18 22:41:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:03,587 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-18 22:41:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:41:03,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-18 22:41:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:03,589 INFO L225 Difference]: With dead ends: 262 [2020-08-18 22:41:03,590 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 22:41:03,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:41:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 22:41:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-18 22:41:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-18 22:41:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-18 22:41:03,603 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-18 22:41:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:03,603 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-18 22:41:03,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:41:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-18 22:41:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 22:41:03,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:03,605 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:03,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:41:03,607 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:03,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-18 22:41:03,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:03,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291326519] [2020-08-18 22:41:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 22:41:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 22:41:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:41:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:03,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291326519] [2020-08-18 22:41:03,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:03,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:41:03,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016269123] [2020-08-18 22:41:03,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:41:03,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:03,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:41:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:41:03,930 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-18 22:41:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:04,141 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-18 22:41:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:41:04,144 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-18 22:41:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:04,147 INFO L225 Difference]: With dead ends: 312 [2020-08-18 22:41:04,147 INFO L226 Difference]: Without dead ends: 222 [2020-08-18 22:41:04,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:41:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-18 22:41:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-18 22:41:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 22:41:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-18 22:41:04,166 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-18 22:41:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:04,166 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-18 22:41:04,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:41:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-18 22:41:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 22:41:04,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:04,168 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:04,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 22:41:04,168 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-18 22:41:04,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:04,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672442668] [2020-08-18 22:41:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 22:41:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:41:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:41:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:04,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672442668] [2020-08-18 22:41:04,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:04,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 22:41:04,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696139043] [2020-08-18 22:41:04,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 22:41:04,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 22:41:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:41:04,508 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-18 22:41:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:04,945 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-18 22:41:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:41:04,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-18 22:41:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:04,947 INFO L225 Difference]: With dead ends: 274 [2020-08-18 22:41:04,947 INFO L226 Difference]: Without dead ends: 187 [2020-08-18 22:41:04,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:41:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-18 22:41:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-18 22:41:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 22:41:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-18 22:41:04,960 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-18 22:41:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:04,961 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-18 22:41:04,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 22:41:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-18 22:41:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 22:41:04,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:04,962 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:04,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 22:41:04,963 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:04,963 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-18 22:41:04,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:04,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008546343] [2020-08-18 22:41:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:04,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 22:41:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 22:41:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 22:41:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:05,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008546343] [2020-08-18 22:41:05,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:05,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 22:41:05,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488667866] [2020-08-18 22:41:05,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 22:41:05,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 22:41:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:41:05,199 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-18 22:41:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:05,409 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-18 22:41:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:41:05,410 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-18 22:41:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:05,412 INFO L225 Difference]: With dead ends: 329 [2020-08-18 22:41:05,412 INFO L226 Difference]: Without dead ends: 236 [2020-08-18 22:41:05,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:41:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-18 22:41:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-18 22:41:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-18 22:41:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-18 22:41:05,435 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-18 22:41:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:05,435 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-18 22:41:05,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 22:41:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-18 22:41:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 22:41:05,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:05,437 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:05,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 22:41:05,444 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:05,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-18 22:41:05,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:05,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923121772] [2020-08-18 22:41:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:41:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 22:41:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 22:41:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:05,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923121772] [2020-08-18 22:41:05,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:05,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 22:41:05,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631788358] [2020-08-18 22:41:05,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 22:41:05,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 22:41:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:41:05,801 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-18 22:41:06,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:06,303 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-18 22:41:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 22:41:06,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-18 22:41:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:06,305 INFO L225 Difference]: With dead ends: 286 [2020-08-18 22:41:06,305 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 22:41:06,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:41:06,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 22:41:06,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-18 22:41:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 22:41:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-18 22:41:06,318 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-18 22:41:06,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:06,318 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-18 22:41:06,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 22:41:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-18 22:41:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 22:41:06,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:06,320 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:06,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 22:41:06,320 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-18 22:41:06,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:06,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307478758] [2020-08-18 22:41:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 22:41:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:41:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:41:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:06,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307478758] [2020-08-18 22:41:06,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:06,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 22:41:06,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936705089] [2020-08-18 22:41:06,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 22:41:06,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 22:41:06,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:41:06,578 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-18 22:41:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:06,856 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-18 22:41:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 22:41:06,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-18 22:41:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:06,859 INFO L225 Difference]: With dead ends: 346 [2020-08-18 22:41:06,859 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 22:41:06,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:41:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 22:41:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-18 22:41:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 22:41:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-18 22:41:06,874 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-18 22:41:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:06,875 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-18 22:41:06,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 22:41:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-18 22:41:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 22:41:06,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:06,876 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:06,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 22:41:06,877 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-18 22:41:06,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:06,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999234875] [2020-08-18 22:41:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 22:41:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:41:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 22:41:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 22:41:06,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999234875] [2020-08-18 22:41:06,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:06,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:41:06,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091617900] [2020-08-18 22:41:06,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:41:06,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:41:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:41:06,936 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-18 22:41:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:06,949 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-18 22:41:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:41:06,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-18 22:41:06,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:06,951 INFO L225 Difference]: With dead ends: 160 [2020-08-18 22:41:06,951 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 22:41:06,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:41:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 22:41:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 22:41:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 22:41:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-18 22:41:06,963 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-18 22:41:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:06,964 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-18 22:41:06,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:41:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-18 22:41:06,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 22:41:06,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:06,965 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:06,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 22:41:06,966 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:06,966 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-18 22:41:06,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:06,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230763772] [2020-08-18 22:41:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:06,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 22:41:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:41:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:41:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 22:41:07,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230763772] [2020-08-18 22:41:07,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:07,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:41:07,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503218259] [2020-08-18 22:41:07,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:41:07,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:41:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:41:07,021 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-18 22:41:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:07,046 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-18 22:41:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:41:07,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-18 22:41:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:07,048 INFO L225 Difference]: With dead ends: 161 [2020-08-18 22:41:07,048 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 22:41:07,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:41:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 22:41:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 22:41:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 22:41:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-18 22:41:07,059 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-18 22:41:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:07,060 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-18 22:41:07,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:41:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-18 22:41:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 22:41:07,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:07,061 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:07,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 22:41:07,062 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-18 22:41:07,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:07,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786909189] [2020-08-18 22:41:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 22:41:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:41:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:41:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:07,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786909189] [2020-08-18 22:41:07,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:07,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 22:41:07,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232318276] [2020-08-18 22:41:07,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 22:41:07,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:07,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 22:41:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:41:07,536 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-18 22:41:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:08,181 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-18 22:41:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:41:08,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-18 22:41:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:08,191 INFO L225 Difference]: With dead ends: 298 [2020-08-18 22:41:08,192 INFO L226 Difference]: Without dead ends: 205 [2020-08-18 22:41:08,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:41:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-18 22:41:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-18 22:41:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-18 22:41:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-18 22:41:08,211 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-18 22:41:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:08,211 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-18 22:41:08,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 22:41:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-18 22:41:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 22:41:08,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:08,213 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:08,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 22:41:08,213 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-18 22:41:08,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:08,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022841070] [2020-08-18 22:41:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:41:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-18 22:41:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 22:41:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:08,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022841070] [2020-08-18 22:41:08,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:08,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 22:41:08,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98321207] [2020-08-18 22:41:08,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 22:41:08,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 22:41:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:41:08,532 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-18 22:41:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:08,814 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-18 22:41:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:41:08,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-18 22:41:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:08,816 INFO L225 Difference]: With dead ends: 363 [2020-08-18 22:41:08,817 INFO L226 Difference]: Without dead ends: 264 [2020-08-18 22:41:08,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:41:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-18 22:41:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-18 22:41:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 22:41:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-18 22:41:08,839 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-18 22:41:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:08,840 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-18 22:41:08,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 22:41:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-18 22:41:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 22:41:08,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:08,841 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:08,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 22:41:08,842 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-18 22:41:08,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:08,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383396408] [2020-08-18 22:41:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:08,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 22:41:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 22:41:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 22:41:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:09,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383396408] [2020-08-18 22:41:09,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:09,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 22:41:09,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028470167] [2020-08-18 22:41:09,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 22:41:09,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 22:41:09,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:41:09,253 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-18 22:41:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:09,935 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-18 22:41:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 22:41:09,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-18 22:41:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:09,940 INFO L225 Difference]: With dead ends: 310 [2020-08-18 22:41:09,940 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 22:41:09,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:41:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 22:41:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-18 22:41:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 22:41:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-18 22:41:09,954 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-18 22:41:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:09,955 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-18 22:41:09,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 22:41:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-18 22:41:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-18 22:41:09,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:09,956 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:09,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 22:41:09,957 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-18 22:41:09,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:09,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347025771] [2020-08-18 22:41:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:09,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 22:41:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:41:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:41:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:10,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347025771] [2020-08-18 22:41:10,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:10,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 22:41:10,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950067976] [2020-08-18 22:41:10,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 22:41:10,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 22:41:10,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:41:10,264 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-18 22:41:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:10,479 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-18 22:41:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 22:41:10,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-18 22:41:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:10,486 INFO L225 Difference]: With dead ends: 380 [2020-08-18 22:41:10,487 INFO L226 Difference]: Without dead ends: 278 [2020-08-18 22:41:10,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:41:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-18 22:41:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-18 22:41:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-18 22:41:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-18 22:41:10,505 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-18 22:41:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:10,506 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-18 22:41:10,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 22:41:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-18 22:41:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 22:41:10,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:10,508 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:10,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 22:41:10,508 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:10,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-18 22:41:10,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:10,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464383269] [2020-08-18 22:41:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 22:41:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:41:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 22:41:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:10,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464383269] [2020-08-18 22:41:10,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:10,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 22:41:10,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210165591] [2020-08-18 22:41:10,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 22:41:10,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 22:41:10,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:41:10,965 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-18 22:41:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:11,700 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-18 22:41:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:41:11,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 22:41:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:11,703 INFO L225 Difference]: With dead ends: 322 [2020-08-18 22:41:11,703 INFO L226 Difference]: Without dead ends: 223 [2020-08-18 22:41:11,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:41:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-18 22:41:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-18 22:41:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-18 22:41:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-18 22:41:11,718 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-18 22:41:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:11,719 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-18 22:41:11,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 22:41:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-18 22:41:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 22:41:11,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:11,720 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:11,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 22:41:11,721 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:11,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-18 22:41:11,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:11,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410538287] [2020-08-18 22:41:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:41:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 22:41:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 22:41:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:12,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410538287] [2020-08-18 22:41:12,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:12,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 22:41:12,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272765646] [2020-08-18 22:41:12,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 22:41:12,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 22:41:12,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:41:12,034 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-18 22:41:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:12,317 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-18 22:41:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:41:12,319 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-18 22:41:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:12,321 INFO L225 Difference]: With dead ends: 397 [2020-08-18 22:41:12,321 INFO L226 Difference]: Without dead ends: 292 [2020-08-18 22:41:12,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:41:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-18 22:41:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-18 22:41:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-18 22:41:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-18 22:41:12,337 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-18 22:41:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:12,337 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-18 22:41:12,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 22:41:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-18 22:41:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-18 22:41:12,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:12,338 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:12,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 22:41:12,339 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:12,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:12,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-18 22:41:12,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:12,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301904717] [2020-08-18 22:41:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:41:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 22:41:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 22:41:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:12,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301904717] [2020-08-18 22:41:12,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:12,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 22:41:12,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305864378] [2020-08-18 22:41:12,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 22:41:12,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 22:41:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:41:12,869 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-18 22:41:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:13,611 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-18 22:41:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 22:41:13,613 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-18 22:41:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:13,615 INFO L225 Difference]: With dead ends: 334 [2020-08-18 22:41:13,615 INFO L226 Difference]: Without dead ends: 232 [2020-08-18 22:41:13,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:41:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-18 22:41:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-18 22:41:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 22:41:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-18 22:41:13,630 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-18 22:41:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:13,630 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-18 22:41:13,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 22:41:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-18 22:41:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-18 22:41:13,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:13,632 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:13,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 22:41:13,632 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:13,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-18 22:41:13,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:13,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721807923] [2020-08-18 22:41:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 22:41:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:41:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 22:41:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:13,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721807923] [2020-08-18 22:41:13,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:13,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 22:41:13,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297745388] [2020-08-18 22:41:13,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 22:41:13,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 22:41:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:41:13,997 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-18 22:41:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:14,315 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-18 22:41:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 22:41:14,318 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-18 22:41:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:14,319 INFO L225 Difference]: With dead ends: 414 [2020-08-18 22:41:14,320 INFO L226 Difference]: Without dead ends: 306 [2020-08-18 22:41:14,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:41:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-18 22:41:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-18 22:41:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-18 22:41:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-18 22:41:14,336 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-18 22:41:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:14,336 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-18 22:41:14,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 22:41:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-18 22:41:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 22:41:14,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:14,338 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:14,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 22:41:14,338 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-18 22:41:14,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:14,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474788260] [2020-08-18 22:41:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:14,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:14,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:14,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:14,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 22:41:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:14,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 22:41:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:14,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:41:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:14,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474788260] [2020-08-18 22:41:14,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:14,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 22:41:14,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913413023] [2020-08-18 22:41:14,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 22:41:14,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 22:41:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:41:14,814 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-18 22:41:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:15,611 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-18 22:41:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 22:41:15,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-18 22:41:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:15,617 INFO L225 Difference]: With dead ends: 346 [2020-08-18 22:41:15,617 INFO L226 Difference]: Without dead ends: 241 [2020-08-18 22:41:15,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:41:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-18 22:41:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-18 22:41:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 22:41:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-18 22:41:15,633 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-18 22:41:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:15,633 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-18 22:41:15,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 22:41:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-18 22:41:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-18 22:41:15,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:15,635 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:15,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 22:41:15,635 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-18 22:41:15,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:15,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940278978] [2020-08-18 22:41:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:41:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 22:41:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:15,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 22:41:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:16,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940278978] [2020-08-18 22:41:16,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:16,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 22:41:16,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765787286] [2020-08-18 22:41:16,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 22:41:16,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 22:41:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:41:16,011 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-18 22:41:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:16,310 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-18 22:41:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 22:41:16,311 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-18 22:41:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:16,313 INFO L225 Difference]: With dead ends: 431 [2020-08-18 22:41:16,313 INFO L226 Difference]: Without dead ends: 320 [2020-08-18 22:41:16,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:41:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-18 22:41:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-18 22:41:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-18 22:41:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-18 22:41:16,330 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-18 22:41:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:16,330 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-18 22:41:16,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 22:41:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-18 22:41:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 22:41:16,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:16,332 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:16,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 22:41:16,332 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-18 22:41:16,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:16,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937977948] [2020-08-18 22:41:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:16,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:16,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:16,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:16,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 22:41:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:16,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 22:41:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:16,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 22:41:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:16,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937977948] [2020-08-18 22:41:16,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:16,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 22:41:16,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88765014] [2020-08-18 22:41:16,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 22:41:16,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:16,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 22:41:16,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:41:16,864 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-18 22:41:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:17,714 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-18 22:41:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 22:41:17,716 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-18 22:41:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:17,718 INFO L225 Difference]: With dead ends: 358 [2020-08-18 22:41:17,718 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 22:41:17,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:41:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 22:41:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-18 22:41:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-18 22:41:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-18 22:41:17,737 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-18 22:41:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:17,738 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-18 22:41:17,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 22:41:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-18 22:41:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 22:41:17,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:17,740 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:17,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 22:41:17,740 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-18 22:41:17,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:17,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403861861] [2020-08-18 22:41:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:17,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:18,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 22:41:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:18,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 22:41:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:18,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:18,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403861861] [2020-08-18 22:41:18,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:18,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 22:41:18,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095227328] [2020-08-18 22:41:18,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 22:41:18,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 22:41:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:41:18,166 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-18 22:41:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:18,419 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-18 22:41:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 22:41:18,420 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-18 22:41:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:18,422 INFO L225 Difference]: With dead ends: 448 [2020-08-18 22:41:18,423 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 22:41:18,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:41:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 22:41:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-18 22:41:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 22:41:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-18 22:41:18,447 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-18 22:41:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:18,448 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-18 22:41:18,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 22:41:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-18 22:41:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 22:41:18,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:18,449 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:18,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 22:41:18,449 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:18,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:18,450 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-18 22:41:18,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:18,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042334378] [2020-08-18 22:41:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:18,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:18,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:18,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 22:41:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:41:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 22:41:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:19,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042334378] [2020-08-18 22:41:19,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:19,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 22:41:19,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256509101] [2020-08-18 22:41:19,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 22:41:19,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 22:41:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:41:19,087 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-18 22:41:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:19,951 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-18 22:41:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:41:19,952 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-18 22:41:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:19,953 INFO L225 Difference]: With dead ends: 370 [2020-08-18 22:41:19,954 INFO L226 Difference]: Without dead ends: 259 [2020-08-18 22:41:19,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:41:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-18 22:41:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-18 22:41:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-18 22:41:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-18 22:41:19,970 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-18 22:41:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:19,970 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-18 22:41:19,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 22:41:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-18 22:41:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 22:41:19,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:19,972 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:19,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 22:41:19,972 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-18 22:41:19,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:19,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625545701] [2020-08-18 22:41:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 22:41:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 22:41:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 22:41:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:20,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625545701] [2020-08-18 22:41:20,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:20,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 22:41:20,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195168027] [2020-08-18 22:41:20,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 22:41:20,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:20,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 22:41:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:41:20,427 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-18 22:41:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:20,775 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-18 22:41:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:41:20,777 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-18 22:41:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:20,779 INFO L225 Difference]: With dead ends: 465 [2020-08-18 22:41:20,779 INFO L226 Difference]: Without dead ends: 348 [2020-08-18 22:41:20,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:41:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-18 22:41:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-18 22:41:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-18 22:41:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-18 22:41:20,797 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-18 22:41:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:20,798 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-18 22:41:20,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 22:41:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-18 22:41:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-18 22:41:20,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:20,799 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:20,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-18 22:41:20,800 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-18 22:41:20,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:20,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115511042] [2020-08-18 22:41:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:21,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:41:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:21,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 22:41:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:21,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 22:41:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:21,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115511042] [2020-08-18 22:41:21,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:21,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 22:41:21,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457677241] [2020-08-18 22:41:21,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 22:41:21,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 22:41:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:41:21,407 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-18 22:41:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:22,555 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-18 22:41:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 22:41:22,556 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-18 22:41:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:22,558 INFO L225 Difference]: With dead ends: 382 [2020-08-18 22:41:22,558 INFO L226 Difference]: Without dead ends: 268 [2020-08-18 22:41:22,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:41:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-18 22:41:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-18 22:41:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-18 22:41:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-18 22:41:22,577 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-18 22:41:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:22,577 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-18 22:41:22,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 22:41:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-18 22:41:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-18 22:41:22,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:22,579 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:22,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-18 22:41:22,579 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-18 22:41:22,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:22,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825313810] [2020-08-18 22:41:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:22,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 22:41:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:41:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 22:41:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:23,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825313810] [2020-08-18 22:41:23,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:23,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 22:41:23,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061533478] [2020-08-18 22:41:23,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 22:41:23,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:23,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 22:41:23,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:41:23,115 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-18 22:41:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:23,547 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-18 22:41:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 22:41:23,547 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-18 22:41:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:23,549 INFO L225 Difference]: With dead ends: 482 [2020-08-18 22:41:23,549 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 22:41:23,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:41:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 22:41:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-18 22:41:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-18 22:41:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-18 22:41:23,572 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-18 22:41:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:23,572 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-18 22:41:23,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 22:41:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-18 22:41:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 22:41:23,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:23,574 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:23,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-18 22:41:23,574 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-18 22:41:23,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:23,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372890571] [2020-08-18 22:41:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:23,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:24,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 22:41:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:24,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 22:41:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:24,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:41:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:24,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372890571] [2020-08-18 22:41:24,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:24,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 22:41:24,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697132604] [2020-08-18 22:41:24,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 22:41:24,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:24,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 22:41:24,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:41:24,266 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-18 22:41:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:25,542 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-18 22:41:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 22:41:25,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-18 22:41:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:25,545 INFO L225 Difference]: With dead ends: 394 [2020-08-18 22:41:25,545 INFO L226 Difference]: Without dead ends: 277 [2020-08-18 22:41:25,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:41:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-18 22:41:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-18 22:41:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-18 22:41:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-18 22:41:25,565 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-18 22:41:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:25,565 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-18 22:41:25,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 22:41:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-18 22:41:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-18 22:41:25,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:25,567 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:25,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-18 22:41:25,567 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-18 22:41:25,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:25,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497236878] [2020-08-18 22:41:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:25,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:41:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 22:41:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 22:41:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:26,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497236878] [2020-08-18 22:41:26,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:26,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 22:41:26,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196654398] [2020-08-18 22:41:26,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 22:41:26,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:26,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 22:41:26,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:41:26,117 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-18 22:41:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:26,474 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-18 22:41:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 22:41:26,475 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-18 22:41:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:26,477 INFO L225 Difference]: With dead ends: 499 [2020-08-18 22:41:26,477 INFO L226 Difference]: Without dead ends: 376 [2020-08-18 22:41:26,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:41:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-18 22:41:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-18 22:41:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-18 22:41:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-18 22:41:26,499 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-18 22:41:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:26,499 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-18 22:41:26,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 22:41:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-18 22:41:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 22:41:26,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:26,501 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:26,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-18 22:41:26,501 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-18 22:41:26,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:26,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256438447] [2020-08-18 22:41:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:26,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:27,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 22:41:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:27,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 22:41:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:27,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 22:41:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:27,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256438447] [2020-08-18 22:41:27,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:27,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 22:41:27,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23168994] [2020-08-18 22:41:27,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 22:41:27,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 22:41:27,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:41:27,247 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-18 22:41:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:28,621 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-18 22:41:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 22:41:28,622 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-18 22:41:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:28,624 INFO L225 Difference]: With dead ends: 406 [2020-08-18 22:41:28,624 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 22:41:28,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-18 22:41:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 22:41:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-18 22:41:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-18 22:41:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-18 22:41:28,645 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-18 22:41:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:28,645 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-18 22:41:28,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 22:41:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-18 22:41:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-18 22:41:28,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:28,647 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:28,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-18 22:41:28,647 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:28,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-18 22:41:28,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:28,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835616591] [2020-08-18 22:41:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:28,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 22:41:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 22:41:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:41:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:29,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835616591] [2020-08-18 22:41:29,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:29,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 22:41:29,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565934729] [2020-08-18 22:41:29,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 22:41:29,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 22:41:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:41:29,208 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-18 22:41:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:29,518 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-18 22:41:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 22:41:29,519 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-18 22:41:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:29,521 INFO L225 Difference]: With dead ends: 516 [2020-08-18 22:41:29,521 INFO L226 Difference]: Without dead ends: 390 [2020-08-18 22:41:29,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 22:41:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-18 22:41:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-18 22:41:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 22:41:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-18 22:41:29,543 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-18 22:41:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:29,543 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-18 22:41:29,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 22:41:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-18 22:41:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 22:41:29,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:29,545 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:29,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-18 22:41:29,545 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-18 22:41:29,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:29,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702482159] [2020-08-18 22:41:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:29,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:30,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 22:41:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:30,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:41:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:30,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 22:41:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:30,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702482159] [2020-08-18 22:41:30,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:30,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 22:41:30,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380066937] [2020-08-18 22:41:30,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 22:41:30,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 22:41:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-18 22:41:30,315 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-18 22:41:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:31,810 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-18 22:41:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 22:41:31,811 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-18 22:41:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:31,813 INFO L225 Difference]: With dead ends: 418 [2020-08-18 22:41:31,813 INFO L226 Difference]: Without dead ends: 295 [2020-08-18 22:41:31,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-18 22:41:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-18 22:41:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-18 22:41:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-18 22:41:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-18 22:41:31,833 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-18 22:41:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:31,833 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-18 22:41:31,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 22:41:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-18 22:41:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 22:41:31,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:31,835 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:31,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-18 22:41:31,835 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:31,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-18 22:41:31,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:31,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317108973] [2020-08-18 22:41:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:31,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:31,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:31,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 22:41:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 22:41:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-18 22:41:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 22:41:32,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317108973] [2020-08-18 22:41:32,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:32,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 22:41:32,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863218945] [2020-08-18 22:41:32,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 22:41:32,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 22:41:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 22:41:32,419 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-18 22:41:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:32,876 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-18 22:41:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 22:41:32,876 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-18 22:41:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:32,879 INFO L225 Difference]: With dead ends: 533 [2020-08-18 22:41:32,879 INFO L226 Difference]: Without dead ends: 404 [2020-08-18 22:41:32,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-18 22:41:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-18 22:41:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-18 22:41:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-18 22:41:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-18 22:41:32,904 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-18 22:41:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:32,905 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-18 22:41:32,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 22:41:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-18 22:41:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 22:41:32,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:32,907 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:32,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-18 22:41:32,907 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:32,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-18 22:41:32,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:32,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147122350] [2020-08-18 22:41:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:32,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 22:41:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 22:41:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 22:41:33,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147122350] [2020-08-18 22:41:33,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:33,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 22:41:33,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664013693] [2020-08-18 22:41:33,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:41:33,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:41:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:41:33,091 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-18 22:41:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:33,304 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-18 22:41:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:41:33,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 22:41:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:33,307 INFO L225 Difference]: With dead ends: 271 [2020-08-18 22:41:33,307 INFO L226 Difference]: Without dead ends: 261 [2020-08-18 22:41:33,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:41:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-18 22:41:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-18 22:41:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-18 22:41:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-18 22:41:33,331 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-18 22:41:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:33,332 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-18 22:41:33,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:41:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-18 22:41:33,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 22:41:33,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:33,333 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:33,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-18 22:41:33,334 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:33,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-18 22:41:33,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:33,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073018494] [2020-08-18 22:41:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 22:41:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 22:41:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 22:41:33,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073018494] [2020-08-18 22:41:33,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:33,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:41:33,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030603905] [2020-08-18 22:41:33,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:41:33,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:41:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:41:33,582 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-18 22:41:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:33,821 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-18 22:41:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:41:33,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 22:41:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:33,825 INFO L225 Difference]: With dead ends: 285 [2020-08-18 22:41:33,825 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 22:41:33,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:41:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 22:41:33,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-18 22:41:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 22:41:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-18 22:41:33,864 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-18 22:41:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:33,864 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-18 22:41:33,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:41:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-18 22:41:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 22:41:33,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:33,866 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:33,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-18 22:41:33,867 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:33,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-18 22:41:33,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:33,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580794722] [2020-08-18 22:41:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 22:41:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:33,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 22:41:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-18 22:41:34,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580794722] [2020-08-18 22:41:34,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:34,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:41:34,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769635841] [2020-08-18 22:41:34,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:41:34,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:34,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:41:34,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:41:34,010 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-18 22:41:34,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:34,074 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-18 22:41:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:41:34,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-18 22:41:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:34,077 INFO L225 Difference]: With dead ends: 271 [2020-08-18 22:41:34,077 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 22:41:34,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:41:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 22:41:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-18 22:41:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 22:41:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-18 22:41:34,108 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-18 22:41:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:34,108 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-18 22:41:34,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:41:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-18 22:41:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 22:41:34,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:34,110 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:34,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-18 22:41:34,111 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-18 22:41:34,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:34,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051352602] [2020-08-18 22:41:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 22:41:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 22:41:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 22:41:34,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051352602] [2020-08-18 22:41:34,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:34,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:41:34,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146134698] [2020-08-18 22:41:34,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:41:34,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:34,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:41:34,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:41:34,434 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-18 22:41:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:34,688 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-18 22:41:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:41:34,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-18 22:41:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:34,691 INFO L225 Difference]: With dead ends: 284 [2020-08-18 22:41:34,691 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 22:41:34,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:41:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 22:41:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-18 22:41:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-18 22:41:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-18 22:41:34,726 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-18 22:41:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:34,727 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-18 22:41:34,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 22:41:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-18 22:41:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 22:41:34,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:34,729 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:34,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-18 22:41:34,729 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:34,730 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-18 22:41:34,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:34,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209179803] [2020-08-18 22:41:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 22:41:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 22:41:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 22:41:34,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209179803] [2020-08-18 22:41:34,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:34,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 22:41:34,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238987368] [2020-08-18 22:41:34,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:41:34,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:41:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:41:34,906 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-18 22:41:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:35,025 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-18 22:41:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:41:35,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-18 22:41:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:35,029 INFO L225 Difference]: With dead ends: 303 [2020-08-18 22:41:35,030 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 22:41:35,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:41:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 22:41:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-18 22:41:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-18 22:41:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-18 22:41:35,068 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-18 22:41:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:35,068 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-18 22:41:35,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:41:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-18 22:41:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 22:41:35,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:35,071 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:35,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-18 22:41:35,071 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-18 22:41:35,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:35,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748893599] [2020-08-18 22:41:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 22:41:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:41:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 22:41:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 22:41:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 22:41:35,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748893599] [2020-08-18 22:41:35,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:35,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:41:35,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968987111] [2020-08-18 22:41:35,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:41:35,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:41:35,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:41:35,251 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-18 22:41:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:35,381 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-18 22:41:35,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:41:35,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-18 22:41:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:35,385 INFO L225 Difference]: With dead ends: 409 [2020-08-18 22:41:35,385 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 22:41:35,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:41:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 22:41:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-18 22:41:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 22:41:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-18 22:41:35,408 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-18 22:41:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:35,409 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-18 22:41:35,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:41:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-18 22:41:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 22:41:35,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:35,410 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:35,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-18 22:41:35,411 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:35,411 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-18 22:41:35,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:35,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884983570] [2020-08-18 22:41:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 22:41:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 22:41:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-18 22:41:35,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884983570] [2020-08-18 22:41:35,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:35,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:41:35,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381555653] [2020-08-18 22:41:35,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:41:35,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:35,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:41:35,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:41:35,615 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-18 22:41:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:35,751 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-18 22:41:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:41:35,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-18 22:41:35,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:35,753 INFO L225 Difference]: With dead ends: 173 [2020-08-18 22:41:35,753 INFO L226 Difference]: Without dead ends: 163 [2020-08-18 22:41:35,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:41:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-18 22:41:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-18 22:41:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-18 22:41:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-18 22:41:35,772 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-18 22:41:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:35,773 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-18 22:41:35,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:41:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-18 22:41:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 22:41:35,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:35,774 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:35,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-18 22:41:35,774 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-18 22:41:35,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:35,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722380056] [2020-08-18 22:41:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 22:41:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:35,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 22:41:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-18 22:41:36,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722380056] [2020-08-18 22:41:36,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:36,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:41:36,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808957172] [2020-08-18 22:41:36,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:41:36,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:36,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:41:36,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:41:36,062 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-18 22:41:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:36,366 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-18 22:41:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:41:36,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-18 22:41:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:36,369 INFO L225 Difference]: With dead ends: 175 [2020-08-18 22:41:36,369 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 22:41:36,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:41:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 22:41:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-18 22:41:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 22:41:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-18 22:41:36,385 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-18 22:41:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:36,386 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-18 22:41:36,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:41:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-18 22:41:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 22:41:36,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:36,387 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:36,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-18 22:41:36,388 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:36,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-18 22:41:36,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:36,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166414875] [2020-08-18 22:41:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 22:41:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:41:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-18 22:41:36,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166414875] [2020-08-18 22:41:36,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:41:36,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 22:41:36,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649622268] [2020-08-18 22:41:36,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:41:36,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:36,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:41:36,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:41:36,645 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-18 22:41:36,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:36,853 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-18 22:41:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:41:36,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-18 22:41:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:36,855 INFO L225 Difference]: With dead ends: 184 [2020-08-18 22:41:36,855 INFO L226 Difference]: Without dead ends: 174 [2020-08-18 22:41:36,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:41:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-18 22:41:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-18 22:41:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-18 22:41:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-18 22:41:36,876 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-18 22:41:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:36,878 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-18 22:41:36,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:41:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-18 22:41:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 22:41:36,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:36,880 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:36,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-18 22:41:36,880 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-18 22:41:36,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:36,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423785082] [2020-08-18 22:41:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 22:41:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:41:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 22:41:37,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423785082] [2020-08-18 22:41:37,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:37,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:41:37,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933960042] [2020-08-18 22:41:37,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:41:37,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:41:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:41:37,171 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-18 22:41:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:37,377 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-18 22:41:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:41:37,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-18 22:41:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:37,380 INFO L225 Difference]: With dead ends: 194 [2020-08-18 22:41:37,380 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 22:41:37,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:41:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 22:41:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-18 22:41:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 22:41:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-18 22:41:37,405 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-18 22:41:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:37,405 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-18 22:41:37,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:41:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-18 22:41:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 22:41:37,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:37,408 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:37,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-18 22:41:37,408 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-18 22:41:37,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:37,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697307802] [2020-08-18 22:41:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 22:41:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:41:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-18 22:41:37,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697307802] [2020-08-18 22:41:37,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:37,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:41:37,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948644735] [2020-08-18 22:41:37,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:41:37,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:41:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:41:37,673 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-18 22:41:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:37,852 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-18 22:41:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:41:37,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-18 22:41:37,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:37,854 INFO L225 Difference]: With dead ends: 160 [2020-08-18 22:41:37,854 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 22:41:37,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:41:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 22:41:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-18 22:41:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 22:41:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-18 22:41:37,877 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-18 22:41:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:37,877 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-18 22:41:37,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:41:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-18 22:41:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 22:41:37,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:37,879 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:37,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-18 22:41:37,879 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-18 22:41:37,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:37,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915781625] [2020-08-18 22:41:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 22:41:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:41:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 22:41:38,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915781625] [2020-08-18 22:41:38,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:38,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:41:38,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699316147] [2020-08-18 22:41:38,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:41:38,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:38,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:41:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:41:38,383 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-18 22:41:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:38,693 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-18 22:41:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 22:41:38,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-18 22:41:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:38,697 INFO L225 Difference]: With dead ends: 155 [2020-08-18 22:41:38,697 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 22:41:38,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:41:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 22:41:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-18 22:41:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 22:41:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-18 22:41:38,714 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-18 22:41:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:38,715 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-18 22:41:38,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:41:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-18 22:41:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 22:41:38,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:41:38,716 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:41:38,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-18 22:41:38,717 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:41:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:41:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-18 22:41:38,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:41:38,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307654796] [2020-08-18 22:41:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:41:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:41:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:41:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:41:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:41:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 22:41:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:41:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:41:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-18 22:41:38,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307654796] [2020-08-18 22:41:38,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:41:39,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:41:39,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17536018] [2020-08-18 22:41:39,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:41:39,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:41:39,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:41:39,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:41:39,001 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-18 22:41:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:41:39,168 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-18 22:41:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:41:39,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-18 22:41:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:41:39,169 INFO L225 Difference]: With dead ends: 137 [2020-08-18 22:41:39,169 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:41:39,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:41:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:41:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:41:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:41:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:41:39,174 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-18 22:41:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:41:39,174 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:41:39,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:41:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:41:39,174 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:41:39,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-18 22:41:39,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:41:40,011 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136